Joint Structural Division Annual Report 2007/2008

Joint Structural Division Annual Report

2007/2008

THE HONG KONG INSTITUTION OF ENGINEERS 香港工程師學會

THE INSTITUTION OFSTRUCTURAL ENGINEERS

英國結構工程師學會

JOINT STRUCTURAL DIVISION

Annual Report 2007/08

Ir K.K. Kwan Division Chairman

Many of you would have participated in the IStructE Centenary Conference (24-26 Jan 2008). The Conference is the fruit of two years’ hardwork of the Core Organising Committee led by Dr H K Cheng. In the run-up to the Conference, members of the committee and senior members of the JSD worked breathlessly editing papers, calling for sponsorships, inviting participants, procuring printer service, organizing conference reception, conference dinner and the memorabilia. The conference cannot be successful without so much work, design and organisation skills. On the first day, the Chief Executive of HKSAR, Mr Donald Tsang, opened the conference, which was attended by over 400 delegates from all over the world. Many past presidents also came from overseas to take part in this very important and memorable event. It was so successful that people are asking if it can be held at more frequent intervals! In the same week we hosted the Presidential Visit by Ms Sarah Buck with Dr Keith Eaton, Chief Executive of the Institution. Like past years, the Presidential Address was an emotional occasion as all newly elected members would be presented the certificate. Parents, husband/wife and boy/girl friends came to witness and share the joy of their loved ones. As usual the event was finished with a bustling photographic session. About 70 members passed the examination and 27 attended the presentation ceremony. I am sure they all went away for a bigger celebration afterwards.

Committee Activities Highlights of committee activities this session are the Special Award and the Annual Seminar. We have eight entries. Winners of the Special Award 2008 was ruled on 15 March 2008 with presentations and site visits and the judges decided that there would be two Special Awards for the HK Project Category, namely Megabox and Science Park Phase II, while MGM Grand Macao won the China Project Category. The Annual Seminar this year will be held on 7 May 2008 of the topic “Innovative Light-Weight Structures and Sustainable Facades”. Speakers will present state-of-the-art design and construction innovation on the subject. Structural Engineers in the Society The JSD nominates members to sit on various government committees and boards to represent the interest of the profession in particular and the community at large. We are consulted about policy changes and implementation issues. We worked as accreditators on university courses, as experts on HKIE Training Schemes and membership matters on the Discipline Board. We took part as committee member in the Quality Building Awards held once every two years. Entries are really professional and were well received by senior managements in site walks. Results of QBA 2008 will be announced in July. Professional Recognition and Training The Reciprocal Recognition-Agreement between HKIE Structural Division and NABER(S) of the Ministry of Construction held its fourth examination in December 2007. More than 80 experienced engineers from HK attended the examination in order to obtain their PRC Registered Structural Engineer I qualification. 2008 will be the last one under the current RRA and the examination is scheduled to be held in Guangzhou around September.

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We also held the second part of training of young structural engineers in China experience (funded 50% by the HKSAR Government under PSDAS). After four days of lectures in Hong Kong, eight young engineers went to Beijing and were attached to CABR Design Institute and Tsinghua Design Institute from 16 July to 21 July to have better understanding on design practices in China. IStructE Matters In addition to Paul T C Pang, Reuben P K Chu and Helen P J Kwan, K K Choy was elected to sit on the Council. In 2009, Paul and Reuben will retire and replacements have been proposed. The Chartered Membership examination was held on a Thursday (3 April 2008) this year as the following day falls on the Ching Ming Festival, a

public holiday in Hong Kong. 201 candidates attended. I am pleased to report that there are 5471 members of the JSD (which includes members of other disciplines, of which about 1800 are corporate members of the IStructE). To serve this large membership, we have the constant support of our committee members and members. I express my whole-hearted appreciations to those who have devoted time and efforts to organize activities of the JSD. Next year is promised to be another successful year.

Ir. K.K. Kwan Division Chairman

IStructE Centenary Conference 24-26 January 2008


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Annual Dinner, 9 November 2007

Joint Structural Division Special Award 2008 The Joint Structural Division Special Award aims to promote excellence in structural engineering demonstrated through the design and construction of buildings and structures in the last few years. The first award was held in 1998/1999 and this is the tenth event. Following a site visit on 15 March 2008 by the Judging Panel, three awards were decided based on the following assessment criteria: aesthetics, engineering approach, integration, economy, innovation, buildability, unique features, sustainability and serviceability. Members of the Judging Panel Ir Prof Paul PANG, Tat-choi, Chairman of the Judging Panel Ir Dr The Hon Raymond HO Chung-tai Ir Dr LAU Ching-kwong Ir Prof Peter LEE Kai-kong Dr Ronald LU Yuen-cheung Prof TENG Jin-guang Ir WAI Chi-sing

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Joint Structural Division Special Award 2008 China Projects Special Award Siu Yin Wai & Associates (Int’l) Ltd for MGM Grand Macau

Structural Engineer and Technical Director Siu Yin Wai and Associates (Int’l) Ltd Developer MGM Grand Paradise Ltd Architect Wong Tung (Macau) Ltd Management Contractor Hip Hing Engineering (Macau) Co Ltd MGM GRAND Macau is a casino and hotel project at the Macau Nam Van district bounded by Avenida Dr. Sun Yat-Sen, Avenida 24 De Junho, and Rua Cidade De Porto with a waterfront view. The project consists of four levels of podium which houses the casino gaming area, retail district, restaurants and theatre; one level of basement for car park and back-of-house for the hotel; and a 35 storey hotel tower.

Special Features of MGM Grand Macau MGM has a unique outlook design simulating three layers of rolling waves with contradicting crests, resulting in a much slender frame with challenging structural design requirements for the hotel tower under high wind and seismic load design limits. MGM consists of unusual steel structures with large spans: the Conservatory Skylight, LED Steel Structure, and Main Entrance Canopy, etc. High speed construction; from start of piling work on June 05 to obtaining Occupation Permit on Dec 07.

Tower Design One of the most exceptional considerations of this project is the Wind + Seismic deflection requirement of the hotel tower. Vertical structural elements to resist the Wind + Seismic loading are restricted within Grid TA to TD i.e.17 meter width due to the special wave appearance of the hotel tower. When compared to the overall height of the hotel at 150m, the aspect ratio is approximately 9. The Macau Wind Code is based on 200 years return period which is nearly 50% higher than the Hong Kong Code. To deal with these unique criteria, Wind Tunnel testing result is adopted to find the wind load of the tower structure and applied to the structure. The result is an enhanced Core Wall and Shear Wall to resist these high lateral pressures. In the design for seismic effects, spectrum analysis is adopted according to the Code for Seismic Design of Building GB50011-2001, in which the seismic intensity of 7 is applied for the spectrum analysis of the structure. Unusual Special Steel Features Design Use of advance technology for steel design and analysis for unusual steel structures; including use of second-order elastic analysis to investigate structural response under different scenarios. Such technology facilitated simulation base approach for structural steel analysis and design, providing sustainable solution for these unusual features. Sophisticated software technology is chosen to model and perform second-order elastic (P-Δ-δ) analyses on unique structures like Conservatory Skylight, Main Entrance Canopy–Porte Cochere and the Large curve LED steel frame at the Northeast Entrance.


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Phase 2 development covers a site area of approximately 8 hectares with a total GFA about 105,000 square meters. Phase 2 comprises of eight laboratory/ office buildings, two E&M service “Energy Tower”, an oval-shaped auditorium in the middle of development, a services tunnel over 700m long around the car park basement, as well as an amphitheatre covered by tensile fabric steel structure. The HKSTP is one of the “Top Ten Science Park” in Asia. It creates a platform for innovation and R&D activities for high-tech and high-value industries. Instead of being a commercial development, large portion of area is assigned to be green open space which also shapes HKSTP into a valuable community recreation park in Hong Kong. In creating this unique world-class laboratory building, flexibility and sustainability were of utmost importance. With vibration performance analysis, waffle slab floor is adopted as an effective structural system in achieving Class C vibration performance; meanwhile, a better Class D vibration criterion is met by introducing an additional anti-vibration pile at the center of the 2-way beam-slab system at G/F. An oval shape auditorium is one of the icons of the HKSTP. The hybrid concrete-steel girder structure gives a more economic structure for the egg-shape auditorium. The hybrid concrete-steels structure

gives an efficient solution in satisfying both the structural stability, architectural and acoustic requirement. The inclined composite columns and ring beams act together effectively in distributing both the gravity and lateral load by arching action. Moreover, by using curved steel structure as the roofing system facilitates an easy installation of cladding system which speeds up the construction process in return. The Amphitheatre is a large tension membrane fabricated from architectural grade PTFE coated fiberglass fabric. It is the first project which obtained the approval from Buildings Department for an amphitheatre covered by tensile fabric steel structure. Unconventional analysis approach of three-dimensional second-order non-linear elastic (P-Δ-δ) analysis methodology is adopted in determining the forces in members and in connections of the steel trusses. Buckling effects including snap-through, member and frame buckling and member imperfection is considered during the analysis process. Robustness was further considered to ensure progressive collapse would not occur in case of accidents. With the service tunnel, building service is centralized in the 2 E&M service “Energy Tower”. The centralization of building service brings out the concept for more efficient use of energy and resources; thus environmental friendly.


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Joint Structural Division Special Award 2008 Hong Kong Projects Special Award Meinhardt China for Hong Kong Science Park, Phase 2 Structural, Civil and Geotechnical Engineer Meinhardt China Developer Hong Kong Science and Technology Parks Corporation Architect Leigh & Orange Ltd.

Main Work Contractors Hsin Chong Construction Co. Ltd. (Area A1) Yau Lee Construction Co. Ltd. (Area B) China Resources Construction Co. Ltd. (Area A2 & Area C)

Joint Structural Division Special Award 2008 Hong Kong Projects Special Award Siu Yin Wai & Associates Ltd. for the Mega Box

Structural Engineer, Siu Yin Wai & Associates Ltd. Developer, Kerry Project Management (HK) Ltd. Project Architect, Wong Tung & Partners Ltd. Design Architect, The Jerde Partnership International Inc. Main Contractor, China Overseas Building Construction Ltd. Stand on the reclaimed land in Kowloon Bay with site area of 120mx100m, Mega Box is a composition of shopping, entertainment, car parking, and office into a 36-storeys building of 175m high. There are one 6.5m deep basement, 19 levels of podium structure, plus two 17 storey high office towers on top, and all of them are rested on 98 numbers of large diameter bored piles with 2m~3m deep pile cap. Because the project’s diverse usages with solid atmosphere, reinforced concrete structure of beam-slab with column and corewall were chosen for its adaptability. There are three special structural features in this building, and they are: “Vertical Integration Module (VIM)” and the two spacious atriums – “Hemispherical Atrium” and “Beehive Atrium”. The concept of “VIM” is to connect the building vertically at all retail floors with car park located at the

top most floors. For vehicles, driveways and ramps are wrapped around the building edges from street level up to L16. Series of escalators with floor voids at random locations plus 41m and 54m express escalators on single span steel trusses that crisscross within the RC frame are offered for those on foots. Due to this connection concept every floor is unique, and the floor diaphragms with voids plus the ramps are carefully modeled in the structural analysis. From L5 to L11, an impressive 36m diameter “Hemispherical Atrium” is inserted on the north face of the building. The half spherical voids and curved slab edges with extrusion balconies are formed complexly by 6~7m cantilever beams with only four columns around the perimeter. On elevation, a full height, 36m diameter, circular glass wall is constructed by using only five horizontal steel trusses that provide lightweight construction and natural lighting into the atrium space.

Beehive Atrium The “Beehive Atrium” is intruded to the upper zone of the box podium which created a 32m high, column free, atrium void with protruded platforms plus 7 mezzanine floors above the 56m x 26m indoor ice skating rink on L10. This challenging structure is achieved by 2 levels of 28m span reinforced concrete girders. Top girders at L18 with hanger posts are suspending the floors down to L16. The bottom girders at L13 support and hang those platforms at L12 to L15 that create the stepping floor edges of a beehive. On elevation, a 42m-wide and 27m high parabolic glass wall provides a view across the harbour. Five horizontal spanning trusses of 18~42m span are used similar to the ½ sphere atrium. In employing proven technologies and readily available material with comprehensive structural analysis model, this structure achieved practicality, durability and economy, as well as beauty of functional form. The fanciful three-dimensional curves on the architect’s drawings are turned into reality with well understood and economic material. Mega Box is the result of integrated design from all aspects and skillful engineering.


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Joint Structural Division Special Award 2008 Hong Kong Projects Commendation Award Hong Kong Housing Authority for Redevelopment of Kwai Chung Flatted Factory Client:

Hong Kong Housing Authority Structural Engineer:

Structural Engineering Section 2, Development & Construction Division, Hong Kong Housing Department

Architect: Architectural Section 1, Development & Construction Division, Hong Kong Housing Department

Main Contractor: Yau Lee Construction Co., Ltd.

This is a pilot project to try out an innovative Enhanced Precast and Prefabrication System (the System), bringing greater precasting benefits of enhanced quality, site safety and environmental protection. It is the first one in public housing developments to use Large Scale Precasting of Structural Shear Walls and Volumetric Components in high-rise residential buildings. The System is adopted in two 41-storey residential buildings, of basically wall-slab structural form. For each building, the precast concrete volume is substantially increased from 20% to a record 60%, involving the following 11 types and about 10,000 pieces of precast elements:-

Conventional Precast Elements Façade, Semi-precast Slab, Staircase, Non-structural Partition and Lintel

New Initiatives Precast Structural Shear Wall - ‘Welded’ Wall - Semi-precast Wall (some with bay windows) Volumetric Precast Components - Bathroom & Bathroom-cum-kitchen - Lift Core & Stair Core

The System achieves a breakthrough development of Precast Structural Shear Walls, which well address the global structural safety concern and incorporate effective structural connections. This breakthrough has enabled the development of large scale volumetric precast components integrated intelligently with shear walls, which satisfactorily overcome the design, fabrication and installation difficulties for such precast components of large size and weight (max 9.5 tonnes) and in large number (1,200 per block). Rigorous design of the precast elements and structural connections by finite element analysis with thorough checking of local effects, structural continuity and overall stability at different construction stages is carried out. Main design approaches of the key new initiatives are as follows:

‘Welded’ Wall, 200mm thick, with multiple waterproofing measures is developed for the external wall. The structural connection between upper and lower walls is by welding of the steel couplers cast in their wall ends. This neither requires special proprietary sleeved couplers nor special skills as quality welding is commonly obtainable. Besides, on-site quality control tests can be performed, and the couplers’ price and supply are more favourable than proprietary couplers that have limited suppliers.

Semi-precast Wall is designed for the gable end wall, located furthest from the tower crane. To avoid upgrading the crane, the wall is designed to comprise a 60mm thick external precast plank with 125mm thick ribs, and an internal insitu concrete portion. Composite structural action is by friction and shear dowels at the interfaces, i.e. the precast portion forms an integral, structural part of the wall and thus not a loss form.

Precast Bathroom and Bathroom-cum-Kitchen integrate with shear walls, i.e. no double walls. For the first time in public housing developments, a seamless fibre reinforced polymer floor pan is used to replace the traditional waterproof membrane and precast floor slab, i.e. no double slabs. More usable space can thus be provided. With so many new initiatives, the pilot project has indeed not only advanced the frontiers of precasting and prefabrication technology in public housing developments but also, through more than 30 site visits and experience sharing forums with various stakeholders - academic institutes, consultants, contractors and government departments, promoted awareness of how the construction industry can contribute more to sustainable development.


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Awards H K Cheng Award is sponsored by Ir Dr Cheng Hon-kwan to recognise the best Hong Kong candidate who scores the highest marks in the Chartered Membership (Part 3) Examination of the Institution of Structural Engineers and the best Hong Kong candidate in 2007 is Mr Choy Hon-kee. Sponsored by structural engineering firms in Hong Kong, 4 Best Student Awards have been announced to commend our undergraduates who demonstrated excellent overall academic results and high level of competence in structural engineering.

Sponsors Awardee Meinhardt (HK) Limited Miss Lau Ching-ling, University of Hong Kong Ove Arup & Partners HK Ltd Mr Lau Pak-yan, Hong Kong Polytechnic University Siu Yin Wai & Associates Mr Tang Siu Kit, Hong Kong University of Science and Technology T K Tsui & Associates Ltd Mr Chow Heung-ming, City University of Hong Kong

Best Reporter Award was introduced in November 2005 to encourage participation in events organized by the Joint Structural Division; to promote interests in the respective themes of the events; and to promote report writing skills among members. Winners of the Best Reporter Award for session 2007/2008 are as follows.

Date of event Winner 20 June 2007 Miss LEE Ching Man, Joy 20 Aug 2007 Ir RAMANATHAN, M. 10 Sept 2007 Ir RAMANATHAN, M. 24 Oct 2007 Miss TONG Man Man 13 Dec 2007 Mr. CHAN Ka Ho, Enoch 29 Dec 2007 Mr. CHAN Chi Hang, Wilfred 5 & 12 Jan 2008 Mr. CHAN Ho Sun 28 Jan 2008 Miss CHAN Hiu Kwan, Winzie

Photos from left to right: Ir Dr HK Cheng presenting the H K Cheng Award to Mr Choy Hon-kee; Ir Aldows HC Tang presenting the Best Student Award to Miss Lau Ching-ling; Ir KK Kwan presenting the Best Student Award to Mr Lau Pak-yan; Ir Siu Yin Wai presenting the Best Student Award to Mr Tang Siu Kit; Ir TK Tsui presenting the Best Student Award to Mr Chow Heung-ming.


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Technical Meetings 2007/2008 Date Details

20 Aug 2007 “Instant Structural Analysis: A Tool for Structural Engineering Students and Engineers” by Ir Prof S Kitipornchai and Dr Paul HF Lam (jointly with City University of Hong Hong)

10 Sep 2007 “The Design and Construction of York House” by Ir James Lam, Maunsell Structural Consultants Ltd.

24 Oct 2007 “A Story about International Commerce Centre” by Ir George Chan and Ir Ernest Chan, Ove Arup & Partners

31 Oc 2007 “Sustainable Construction” by Prof Roger Plank, Vice President of IStructE

28 Nov 2007 “Enhancing Ductility of Non-seismically Designed RC Shear Walls and Columns” by Ir Dr JS Kuang (jointly with the HKUST)

13 Dec 2007 “The Design and Construction of the Miu Fat Buddhist Monastery” by Ir HK Ng, JMK Consulting Engineers Limited

21 Jan 2008 “IStructE – our Centenary and beyond”, IStructE Presidential Address, by Ms Sarah Buck 28 Jan 2008 “Bridge Aesthetics”, the second YK Cheung Lecture by Dr. Man-Chung Tang, Board of TY

Lin International, (jointly with The HKU) 4 Feb 2008 “The New Hong Kong Concrete Code”, by Ir Prof Albert K.H. Kwan, The HKU

15 Feb 2008 “Fire Resistance of High Strength Concrete” by Ir Dr Wong Yuk Lung, The HKPU 10 Mar 2008 “Improvement Works to Lo Wu Station” by Ir David Howe and Ir Kenith Ho, Meinhardt

Consulting Engineers 10 April 2008 “Young Structural Engineers working in Mainland – An Experience Sharing Seminar” by Ir

Goman Ho and Ir Eric Lam, Ove Arup & Partners plus young engineers participated in PSDAS scheme

27 June 2008 “The Venetian® Macao Resort Hotel” by Ir Anthony Chiu, Ove Arup & Partners 2 July 2008 “1 Island East” by Ir Maverick Chan, Ove Arup & Partners

Seminars 2007/2008

Date Details 24 ~ 26 Jan 2008 IStructE Centenary Conference “Turning Ideas into Reality” by eminent and world renown

structural engineers 1 Mar 2008 Technical Seminar on “Examination Technique for the IStructE Chartered Membership Part

3 Examination” 3 Mar 2008 Half-day seminar on “Urban Design and Heritage Conservation”, co-organized with British

Consulate General 7 May 2008 Annual Seminar on “Innovative Light-weight structures and sustainable facade”

Technical Visits 2007/2008

Date Details 29 Dec 2007 Full-day technical visit to Praia and Venetian Cotai in Macau

5 & 12 Jan 2008 Half-day technical visits to International Commercial Centre 11 ~ 14 Apr 2008 Annual Visit to Nanjing PRC

26 Apr 2008 Technical visit to Construction Projects in Guangzhou PRC, jointly with HKIPM & BD

Left and center photos: Technical Meetings; Right photo: Technical Visit


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Technical Meetings

IStructE Presidential Address, 16 January 2007

List of Chairmen of the Joint Structural Division

Session Name of Chairman Session Name of Chairman 1st 79/80 Ir TSUI Tack Kong 21st 99/00 Ir Kenneth LAU Kwong Hon 2nd 80/81 Ir Prof Fred NG Sai Ho 22nd 00/01 Ir Reuben CHU Pui Kwan 3rd 81/82 Ir Dr Raymond HO Chung Tai 23rd 01/02 Ir Prof Paul PANG Tat Choi 4th 82/83 Ir Andrew NGAI Bick Yau 24th 02/03 Ir Johnny FAN Siu Kay 5th 83/84 Ir David George HOLMES 25th 03/04 Ir Helen KWAN Po Jen 6th 84/85 Ir Brian POON Hon Yin 26th 04/05 Ir Joseph MAK Yiu Wing 7th 85/86 Ir David CHAN Wing Keung 27th 05/06 Ir Professor CHOY Kin Kuen 8th 86/87 Ir Barry John STUBBINGS 28th 06/07 Ir CHENG Yan Kee 9th 87/88 Ir Dr LAW Kwok Sang 29th 07/08 Ir KWAN Kin Kei 10th 88/89 Ir Patrick YIM Chun Nam 11th 89/90 Ir Dr Joseph CHOW Ming Kuen 12th 90/91 Ir Bruce Malcolm FOX 13th 91/92 Ir TSE Pak Kin 14th 92/93 Ir Ricky SO Yau Chi 15th 93/94 Ir Hugh WU Sai Him 16th 94/95 Ir Ignatuis LAU Yik Sum 17th 95/96 Ir WONG Chi Ming 18th 96/97 Ir CHEUNG Kwok Ming 19th 97/98 Ir Prof KO Jan Ming 20th 98/99 Ir Prof James LAU Chi Wang

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Joint Structural Division Committee Members

Joint Structural Division Honorary Advisors

Ir Dr C K LAU Ir Professor Fred S H NG

AP/RSE/RGE Committee Representative

Ir Dr K S LAW (Chairman of the AP/RSE/RGE Committee) IStructE Council Member

Ir Professor K K CHOY Ir Helen P J KWAN Ir Reuben P K CHU Ir Professor Paul T C PANG

Sub-committee on IStructE Business

Convener Ir Professor Paul T C PANG Deputy Convener Ir Reuben P K CHU

IStructE Examiners (Chartered Membership)

Chief Examiner Ir Professor H K NG Marking Examiner Ir Helen P J KWAN Ir Dr C K LAU Ir Dr James C W LAU Ir Dr K S LAW

THE HONG KONG INSTITUTION OF ENGINEERS 香港工程師學會

THE INSTITUTION OF STRUCTURAL ENGINEERS

英國結構工程師學會 JOINT STRUCTURAL DIVISION

Chairman Ir K K KWAN Immediate Past Chairman Ir Y K CHENG Deputy Chairman Ir S T CHAN Hon. Secretary Ir Dr Eddie S S LAM Hon. Treasurer Ir Aldows H C TANG Programme Coordinator Ir Eric P W CHAN Deputy Hon. Secretary Ir Raymond W M TANG Deputy Programme Coordinator Ir Dr Ray K L SU Members Ir Allan S K CHAN Ir Alkin C W KWONG Ir Professor K F CHUNG Ir Philip C T KWOK Ir Professor S KITIPORNCHAI Ir C K LAU Ir Dr J S KUANG Ir Y W SIU Ir Professor Albert K H KWAN Ir Gabriel L K YU Ex-officio Member (AMC) Mr David P S CHAN Ex-officio Member (YMC) Ir Laurel S K LEUNG Ex-officio Council Member (Division) Ir Professor K K CHOY Ex-officio Discipline Rep (Division) Ir Professor Paul T C PANG Co-opted Member Ir Dr C M KOON Ir S C LAM

Joint Structural Division Annual Report 2007/2008

Documents

Transcript of Joint Structural Division Annual Report 2007/2008