joint structural division annual report...

Joint Structural Division Annual Report

2006/2007

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 2006/07

Ir Y.K. Cheng, J.P. Division Chairman

Current number of members (inclusive of all grades) of the Joint Structural Division stands at 5,279. Committee Activities The Joint Structural Division has continued to maintain a full agenda of activities which include :

• Monthly Committee Meetings • Technical Meetings and Technical Visits

covering a range of topics • Joint Institute Conference with HKIA,

HKIS and HKIP • Joint Structural Division Special Awards • Annual Dinner • Annual Seminar • Annual General Meeting • Annual Visit

Our committee members and senior members represented the Joint Structural Division on various boards and committees of the HKIE and government departments relating to the construction industry in general and structural engineering in particular. Many of these committees command an awesome workload, and I am grateful to them for so willingly devoting their time and talent. We are building up strong links with China. We initiated the China Award programme with the aim of bringing closer together ourselves and our counterparts in China. We attended major structural engineering conferences last autumn in Chongqing & Shanghai. The current situation, and reality, is that many Hong Kong structural engineers are working in China and on China projects, and a familiarization of China’s methodology and practice is of vital importance. Major Events The Annual Dinner was held on 19 January, 2007

at the Holiday Inn Golden Mile was once again a full house with well over 400 members and guests. It coincided with the official visit to Hong Kong by Mr. David Harvey, President of IStructE. For Annual Visit, Harbin in northeastern China in June 2007 has been planned. The Harbin Institute of Technology, the Institute of Mechanics as well as the many tourist attractions Harbin has to offer will prove interesting. The visit will be led by senior members, and we are expecting fruitful interactions with our counterparts there. The Judging Panel for this year’s Joint Structural Division Special Award had selected 1 project for the Special Award, and 2 projects for the Commendation award. All 3 projects are located in Hong Kong. No award is made under the “China Projects” category. These 3 projects will also be submitted for entry for the IStructE China Award 2007 to be held in Shanghai in late 2007. The standard of the submitted projects are very high. The Judging Panel members deserve our sincere thanks for their time and effort. Following last year’s very successful Annual Seminar on “Structural Fire Engineering” held in June 2006, we look forward to our Annual Seminar on 16 May, 2007. It is entitled “Conservation of Heritage Buildings”, a topic of contemporary and current interest in Hong Kong. The opportunity will be taken to highlight the role played by structural engineers, drawing relevant experience from overseas. Professional Recognition and Training It was decided that assessment for the Reciprocal Recognition Agreement between the HKIE and the NABER(S) of under the Ministry of Construction would not be held in the 2006-07 Session. Resumption of the test is expected for late 2007. Under the Professional Services Development Assistance Scheme funded by the Commerce, Industry and Technology Bureau, we have once again organized a training package to sharpen the

J O I N T S T R U C T U R A L D I V I S I O N

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competitive edge of local young engineers to work in the Mainland. Two series of seminars were held in March 2007 with presentations made by 4 renowned structural engineers from the Mainland to more than 100 young structural engineers. The topics covered range from seismic design, local practice in China, foundations to special structures. The internship will form the remaining part of the package. Handbooks on the new structural codes in the areas of foundation, structural concrete, structural steelwork and pre-casting have proved useful and popular to the profession. One handbook on demolition has since been commissioned. Our Best Reporters scheme has been initiated to encourage young engineers to develop an interest in writing, an aspect of communication so crucial to enhancing the image of engineers. IStructE Matters I did mention at the start that the 2006-07 Session would be a year of change for the Joint Structural Division especially on IStructE affairs as highlighted by a progressive migration of the “overseas representative” arrangement to that of a Sub-Committee under the Joint Structural Division Committee. In this connection, I very much wish to record a vote of thanks to Professor Peter K.K. Lee of the University of Hong Kong for all that he has done for IStructE and structural engineering in Hong Kong. Mr. David Harvey, President, and Dr. Keith Eaton,

Chief Executive, IStructE, visited Hong Kong in January 2007. Their week long stay enabled the President to spend more time with members, culminating in their attending our Annual Dinner. As in past years, the President addressed us and presented certificates to newly elected Fellows and corporate members. Our 3 members on the IStructE Council – Paul T.C. Pang, Reuben P.K. Chu & Helen P.J. Kwan – have served as a useful link between IStructE Headquarters and Hong Kong. The Chartered Membership examination was held on 13 April, 2007 with a total of 218 candidates. Appreciation I take this opportunity to salute members of the Structural Division. I am impressed by the quiet yet efficient way they contribute towards a better environment, a more settled existence, and an improved quality of life. Thank you for all that you have done for structural engineering. The activities of the Joint Structural Division cannot be realized without the staunch support by our members. Our Committee members have devoted much of their time and energy to ensure smooth running of the Division. This is very much appreciated. To all of you, my profound and eternal gratitude.

Ir. Y.K. Cheng J.P. Division Chairman

Presidential Address and Certificate Presentation Ceremony on 15 Feb 2007


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Technical Meetings

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IStructE Presidential Address, 16 January 2007

Half-day Technical Seminar on IStru

Annual Dinner, 19 January 2007


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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 2006 is Mr Patrick Wong Ka-yiu. 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 Mr To Chiu-yin, University of Hong Kong Ove Arup & Partners HK Ltd Miss Lam Sze-yun, Hong Kong Polytechnic University Siu Yin Wai & Associates Mr Chau Hiu-tik, Hong Kong University of Science and Technology T K Tsui & Associates Ltd Miss Lau Chau-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 2006/2007 are as follows.

Date of event Winner 22 May 2006 Miss LEE Ching Man 7 Jul 2006 Miss TONG Man Man 14 Sep 2006 Ir LAU Wai Hin 20 Oct 2006 Mr LIU Kin Ming 25 Oct 2006 Ir M RAMANATHAN 19 Dec 2006 Mr NG Pui Lam 15 Jan 2007 Mr LIU Kin Ming 14 Feb 2007 Ir LAM Wai Keung

Photos from left to right: Ir Dr HK Cheng presenting the H K Cheng Award to Mr Patrick Wong Ka-yiu; Ir Reuben PK Chu presenting the Best Student Award to Mr To Chiu-yin; Ir KK Kwan presenting the Best Student Award to Miss Lam Sze-yun; Ir Benny Lai presenting the Best Student Award to Mr Chau Hiu-tik; Ir TK Tsui presenting the Best Student Award to Miss Lau Chau-ming


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Joint Structural Division Special Awards 2007 The Joint Structural Division Special Awards 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 ninth event. Following a site visit on 30 March 2007 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 Dr The Hon Raymond C T HO, Chairman of the Judging Panel Ir Professor J M KO Ir Professor Peter K K LEE Ir Professor James C W LAU Dr Ronald LU Ir Professor Paul T C PANG Ir T K Tsui

Site Visit by the Judging Panel on 30 March 2007


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Joint Structural Division Special Award 2007 Hong Kong Projects Special Award Maunsell Aecom Group for the York House

Structural, Civil and Geotechnical Engineer Maunsell Aecom Group Developer Hongkong Land Ltd Architect Aedas Ltd Main Contractor Gammon Construction Ltd York House is a 26-storey mixed-use commercial building with 14 office floors, 7 levels of retail podium and 2 levels of basement carpark redeveloped from the original 7-storey building built in the early 1980s. The site was confined by existing buildings and busy traffic. The retail levels were linked to the existing Landmark retail podium on the west side and to other commercial buildings by a footbridge on the east side. Tube-In-Tube bored pile installation method was used to overcome the underground water pressure

and to eliminate dewatering during installation of the new bored piles. Top-down basement reconstruction was adopted to make use of existing rigid basement carpark floors and perimeter basement walls as earth retaining structures for this confined urban site. This method minimised the ground movements and also allowed early commencement of the superstructure works. The corewall was built by bottom-up method to improve the overall integrity and stability of the superstructure. The basement construction sequence and shoring arrangement were considered comprehensively to cater for the stability and load transfer of the top-down plus bottom-up basement reconstruction. The existing basement perimeter walls and slabs acted as the temporary excavation lateral support system as well as the permanent basement structures. Together with the reuse of existing caisson foundations to support the basement floor loads, it offered a sustainable structural design. The corewall was designed as vertical diaphragms to transfer the tower loads directly to the bored piles so that pile caps were eliminated. No major excavation and dewatering were therefore required at the existing lowest basement level. Comprehensive structural analysis and design allowed half of the core wall to be cantilevered above the existing car ramp to cater for vehicular traffic throughout construction. Construction Analysis Monitoring Technique was used to simulate the movement behaviors of the building with special geometry according to the construction sequence. The building movement and curvature were predicted by this method and this allowed the lifts, curtainwall, retail glass wall, and other movement sensitive installations to be properly installed at different construction stages. The actual building movements were monitored against the predicted movements and the construction sequence was adjusted to keep the overall building movements within acceptable limits. A transfer steel trusses system at the 7th level mechanical floor provided maximum flexibility on column arrangement for the office tower and retail podium below. These structural forms enabled effective floor usage to fulfill the Client’s requirements. Composite slab with structural steel floor system eliminated the use of timber form work. Recycling of demolished debris for construction material production and use of Jump Form are also the environmentally friendly features of this Project.


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Joint Structural Division Special Award 2007 Hong Kong Projects Commendation Award JMK Consulting Engineers Ltd. for the Grand Hall Building of the Miu Fat Buddhist Monastery, Nam Tei, Tuen Mun, NT

Structural, Civil and Geotechnical Engineer JMK Consulting Engineers Limited Developer Miu Fat Buddhist Monastery Architect Michael Chiang & Associates Limited Main Contractor W. M. Construction Limited The Grand Hall Building of the Miu Fat Buddhist Monastery takes the form of a seven-level stepped structure of 22m tall topped by a lotus-shape glazed shrine hall of 20m in height. The building design reflects the Buddhist view of the universe. The stepped structure is of concrete construction. It houses a car park, culture and welfare facilities, administration offices, a double-storey mediation hall and a library floor. Top level of the stepped structure is an overhanging podium platform. The lotus-shape shrine hall above the platform measured 52.5m by 52.5m on plan without any internal column. The roof structure of the shrine hall is a space steel frame construction supported by 28 inclined truss frames along the edges of the roof. The roof space frame together with the widely spaced inclined trusses enables maximum provision of glazing. In the shape of a 50-degree inverted pyramid, the structural form elegantly conforms to the shape of a “crystal lotus" and adequately satisfies client’s requirements on

transparency, natural ventilation and environmental aspects.

Basic elements of the roof space frame are square base double-layer grids. Upper and lower chords are 200mm diameter circular hollow steel sections and the web members are 195mm hollow tubes. Depth of the space frame is 3m. All members are principally connected by welded construction. The inclined truss frames supporting the roof structure are designed as hinged connection at the base. The external glazing of the hall consists of 29mm laminated structural glass panels mounted onto the inclined frames by poles and spider supporters.

One of the major considerations of the structural design and construction is the erection of the roof space frame. The mega roof structure is 42m above ground and supported only by 28 perimeter inclined truss frames. In order to minimize the construction cost and to avoid extensive temporary work, the structural engineer has developed a unique construction method which employed four lifting towers with hydraulic jacking system to elevate the 200-tonne space frame to the required roof level.

Elements of the roof frame were initially assembled on the podium platform. The frame was then elevated by 7m and locked to the lifting towers to facilitate the construction of the concrete perimeter frames of the hall. Upon completion of the concrete perimeter frames, the roof frame was lifted to the final level. At this stage, the base hinges of the 28 pre-fabricated support trusses were embedded into the concrete perimeter frame. Finally, the support truss frames were lifted and fixed to the roof according to the designed sequence and angle to provide inclined permanent supports to the roof space frame.

In planning the structural form, the structural engineer has fully considered the maximization of the glazing transparency for the aesthetic, functional and energy efficiency principles. The levels and pacing of each jacking point were precisely monitored by laser beams. The most critical variation of stresses occurs at the stage of transferring the overhanging roof frame supported by four temporary lifting towers to the permanent structural form supported by 28 inclined perimeter frames.


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Joint Structural Division Special Award 2007 Hong Kong Projects Commendation Award Architectural Services Department for the Hong Kong Wetland Park and Visitor Centre

Structural Engineer : Architectural Services Department, HKSAR Government Client : Agriculture, Fisheries and Conservation Department, HKSAR Government Architects : Architectural Services Department, HKSAR Government Main Contractors : Gammon Skanska Ltd. (Sub-structures), Chevalier Construction Co. Ltd. (Main building)

The Hong Kong Wetland Park is on a 61-hectare site on the north-eastern edge of Tin Shui Wai, New Territories, Hong Kong. The Park is envisaged as a prime example of harmony with nature, environmental practice and sustainable development unique to Hong Kong, seeking to provide equally for the very varied functions of conservation, tourism, education and recreation. The Visitor Centre has a footprint of 10,000m2 with three major Galleries, Resource Centre, Office, Café, Shop and Play area. A Discovery Centre and three Bird Hides are situated in the external area. All display unique functions to convey wetland messages. The Visitor Centre is purposely hidden within the landscaped sloping roof to demonstrate the design team’s environmental consciousness of the development and its intention to harmonize the natural setting both visually and functionally. The Visitor Centre is a two-storey building using traditional reinforced concrete construction with an extensive use of fairface concrete to minimize the unnecessary use of resources. The columns are on a 9m grid except in places such as the lecture room and galleries where the span is increased to 18m. The structural form is simple and well proportioned with effective design solution yet coherent to the lively and elegant piece of architecture with green concept throughout. The project was chosen as ArchSD’s pilot project in the use of structural concrete containing recycled aggregates. Apart from areas requiring watertight construction, all other concrete used in the substructures, ground floor, retaining walls and majority of the external works structures contained recycled aggregates. 75% of the total volume of structural concrete used contains recycled aggregates or PFA and the deliberate reuse of scrap materials delivers a clear message of conservation to natural resources.


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Technical Meetings 2006/2007 Date Details

7 Jul 2006 “Serviceability and Strength of Normal and High Strength Concrete Structures” by Prof YC Loo, Griffith University (jointly with HKU)

14 Sep 2006 “The Cambridge House” by Ir James Lam, Maunsell Structural Consultants Ltd 20 Oct 2006 “Grandstands and Design for Dynamic Crowd Loading” by Prof John Dougill, King’s College

and Imperial College, London (jointly with HKU) 25 Oct 2006 “Technical Guidelines on Bamboo Scaffolds” by Ir Joseph CC Chan, Buildings Department 19 Dec 2006 “Three Pacific Place Hong Kong”, by Ir Gordon Ng, Ove Arup & Partners HK Ltd 15 Jan 2007 “The Choi Hung Park & Ride Development” by Ir David Lee and Ir HY Lee, Maunsell

Structural Consultants Ltd 16 Jan 2007 Presidential Address “The Value of the Institution – A New Perspective”, by Mr David Harvey,

President of the IStructE 2006/07 14 Feb 2007 “Hong Kong MTR – a success story”, by Ir Thomas SK Lai, Chairman of North Thames

Branch of IStructE 26 Mar 2007 “Special Features of Hong Kong Code of Practice for the Structural Use of Concrete 2004”, by

Ir Prof Paul TC Pang, Buildings Department 28 Mar 2007 “Standard Fire Tests for Building Structures” by Dr SW Yuen (jointly with Building Division) 13 Apr 2007 “Case Study for Tension Fabric Steel Structure of Amphitheatre Located at Hong Kong Science

Park Phase II”, by Ir Adam Choy and Ir Alex Lai 20 Jun 2007 “Thunderstorm Wind in Hong Kong”, by Prof Edmond Choi and Mr HY Mok from the Hong

Kong Observatory (jointly with City University)

Seminars 2006/2007 Date Details

23 Aug 2006 Technical Seminar on “Large-Span Structures by Architectural Services Department” by Ir Francis MK Tong (jointly with ArchSD, Building Division and YMC)

21 Nov 1006 Open Forum on IStructE-NABER(S) Supplementary Test, convener Ir Prof Paul TC Pang 24 Nov 2006 Joint Conference on “Urban Survival” organised by HKIA, HKIE (JSD & BD) and HKIS, and

co-organized by HKIP (Theatre II, HKCEC) 3 Mar 2007 Technical Seminar on “Examination Technique for the IStructE Chartered Membership Part 3

Examination” (Chiang Chen Studio Theatre, HKPU) 16 May 2007 Annual Seminar on “Conservation of Heritage Buildings” (Theatre II, HKCEC)

Technical Visits 2006/2007

Date Details 26 Aug 2006 Hong Kong Museum of Coastal Defence and Ma On Shan Sports Centre by Ir KT Leung and Ir

CC Choy (jointly with ArchSD, Building Division and YMC) 6 & 20 Jan 2007

Redevelopment of Kwai Chung Flatted Factory by Ir Martin Cheung, Ir SC Lam and Ir Conrad Wong (jointly with Building Division and YMC)

24 Feb & 10 Mar 2007

Motion Simulator Laboratory in the Hong Kong University of Science and Technology (jointly with YMC)

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


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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 HKIE Council Members

Immediate Past Chairman Ir Dr Greg C Y WONG Elected Ordinary Member Ir C K LAU Ir P K LEE Ir Professor Paul T C PANG Ir K W LEE Ir Y W SIU Council Member (Division) Ir Professor K K CHOY Observers Ir Dr The Hon Raymond C T HO (Legislative Council) Ir Dr James C W LAU (Chairman of Engineers Registration Board)

AP/RSE/RGE Committee Representative

Ir K K KWAN (Chairman of the AP/RSE/RGE Committee) IStructE Council Member

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

IStructE Representatives

Ir Dr The Hon Raymond C T HO Ir Professor Peter K K LEE IStructE Examiners (Chartered Membership)

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

Chairman Ir Y K CHENG Immediate Past Chairman Ir Professor K K CHOY Deputy Chairman Ir K K KWAN Hon. Secretary Ir Dr Eddie S S LAM Hon. Treasurer Ir Joseph W J CHI Programme Coordinator Ir Dr Francis T K AU Deputy Hon. Secretary Ir Professor K F CHUNG Deputy Hon. Treasurer Ir C K LAU Deputy Programme Coordinator Ir Eric P W CHAN Members Ir Allan S K CHAN Ir Y W SIU Ir S T CHAN Ir Aldows H C TANG Ir Dr J S KUANG Ir Raymond W M TANG Ir Professor Albert K H KWAN Ir Gabriel L K YU Ir Philip C T KWOK Ex-officio Member (AMC) Mr Tony T LUNG Ex-officio Member (YMC) Ms Crystal W C HO 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 Professor S KITIPORNCHAI Ir Alkin C W KWONG


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List of Chairmen of the Joint Structural Division

Session Name of Chairmen 1st 79/80 Ir TSUI Tack Kong 2nd 80/81 Ir Professor Fred NG Sai Ho 3rd 81/82 Ir Dr the Hon Raymond HO Chung Tai 4th 82/83 Ir Andrew NGAI Bick Yau 5th 83/84 Ir David George HOLMES 6th 84/85 Ir Brian POON Hon Yin 7th 85/86 Ir David CHAN Wing Keung 8th 86/87 Ir Barry John STUBBINGS 9th 87/88 Ir Professor LAW Kwok Sang

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 Professor KO Jan Ming 20th 98/99 Ir Professor James LAU Chi Wang 21st 99/00 Ir Kenneth LAU Kwong Hon 22nd 00/01 Ir Reuben CHU Pui Kwan 23rd 01/02 Ir Professor Paul PANG Tat Choi 24th 02/03 Ir Johnny FAN Siu Kay 25th 03/04 Ir Helen KWAN Po Jen 26th 04/05 Ir Joseph MAK Yiu Wing 27th 05/06 Ir Professor CHOY Kin Kuen 28th 06/07 Ir CHENG Yan Kee

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

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