Date, time & venue
2017-07-14;8:45 am (registration) for 9:00 am to 5:45 pm;Room N002, The Hong Kong Polytechnic University, Hunghom, Kowloon.
(Supported by Structural Division)
Scope and Objectives
Further to the seminar on the Seismic Design Concept in Buildings held on 24 June 2016,the present workshop is tailor-made to elaborate the static and dynamic seismic design analysis methods with sophisticated worked examples for practicing engineers to grasp the seismic design analysis methods in a more thorough manner.
This full-day workshop presents worked examples to elaborate the following analysis methods adopted in seismic design:
1. Static (Elastic and linear) – the approach is to first determine the amount of base shear Fb as a function of seismic and site parameters and then construct the lateral load profile to represent the seismic action. Method is simple but is very restrictive and hence not commonly used (as it is only applicable to buildings which are regular both vertically and horizontally). It is also known as the lateral force method of analysis.
2. Static (Inelastic and non-linear) – Pushover analysis is a non-linear static analysis procedure carried out under conditions of constant gravity loads and monotonically increasing horizontal loads. It may be applied to verify the structural performance of newly designed and of existing buildings for the purpose of verifying or revising the over-strength ratio values; estimating the expected plastic mechanisms and the distribution of damage; assessing the structural performance of existing on retrofitted buildings; and as an alternative to the design based on linear-elastic analysis which uses the behavior factor q. Method requires knowledge of the post-elastic behaviour of the building and is rarely used in areas of low to moderate seismicity.
3. Generalised Force Method of Analysis – This method which was introduced recently by the speaker is based on adapting the procedure of a pushover analysis for solving a linear elastic problem thereby making the static elastic analysis more versatile. This method retains the simplicity of a static elastic linear analysis and yet is much more accurate and is also applicable to buildings of up to 30 m in height including buildings with vertical and/or horizontal irregularities.
4. Dynamic (elastic and linear) – This type of analysis shall be applied to tall buildings and buildings which do not satisfy the conditions for applying the lateral force method of analysis. The response of all modes of vibration contributing significantly to the global response shall be taken into account. This requirement may be deemed to be satisfied if either of the following can be demonstrated: (i) sum of effective modal masses for modes taken into account the amounts to at least 90% of the total mass of the structure; (ii) all modes with effective modal masses greater than 5% of the total mass are taken into account.
5. Dynamic (inelastic and non-linear) – The time-dependent response of the structure may be obtained through direct numerical integration of its differential equations of motion, using accelerograms to represent earthquake ground motions. The structural element models should conform to rules describing the element behavior under post-elastic unloading and reloading cycles. These rules should realistically reflect the energy dissipation in the element over the range of displacement amplitudes expected in the seismic design situations. If the response is obtained from at least 7 non-linear history analyses, the average of the response quantities should be used as the design value. Otherwise, the most unfavourable value of the response quantity should be used.
To this end, we are very honoured to invite Prof. Nelson LAM of Melbourne University to deliver the practical worked examples in detail.
Prof. Nelson Lam in Department of Infrastructure Engineering at The University of Melbourne, has 35 years of experience in structural engineering. He has been working in the specialized field of earthquake engineering, impact dynamics and structural dynamics; he is a member of the standing committee for future revisions to the Australian standard for seismic actions; he is the principal international advisor to the drafting of the National Annex to Eurocode 8 on the seismic design of building structures for Malaysia, and is a member of the Seismic and Dynamic Events Panel commissioned by the London Headquarter of The Institution of Structural Engineers. His achievement in research in this field was recognized by the award of the Chapman Medal (1999) and Warren Medal(2006) by Engineers Australia; the Best Paper Award (2004-2007) by the ISET Journal of Earthquake Technology; and Chapman Medal for the second time in 2010. He is also recipient of Award for Teaching Excellence given out by Engineers Australia in 2012and Academic Staff Teaching Award by Melbourne School of Engineering in 2013. His early career as structural engineer was with Scott Wilson International throughout the1980’s and attained British chartered engineer status during that period. He was awarded the degree of BSc in civil engineering with first class honours at the University of Leeds, England in 1981, MSc degree in concrete structures at Imperial College of Science &Technology, London in 1982 and PhD in earthquake engineering at the University of Melbourne in 1993.
English will be the official language.
The registration fee includes a copy of lecture notes, a copy of CPD certificate.
Regular Registration: HK$ 1,000 each for HKISC Members, HK$ 1,200 each for HKIE Members; HK$ 1,400 each for non HKISC/ HKIE Members.
Group Registration: HK$ 1,200 each for group registration of at least 5 people
CPD Certificates: This seminar is recommended for 6-hour CPD.
Please send the completed registration form with registration fee to Mr. Sam Chan, HKISC c/o ZS972, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon by 30 June 2017 (Fax No.: 852-2334 6389). You can download this form on HKISC web (http://www.hkisc.org) or request through emailing to: email@example.com. For further information, please contact Mr. Sam Chan above.