长江城建讲坛(2018年第五讲):Development of high-performance structural systems for seismic applications

时间:2018-04-23 17:45 点击数:89

长江城建讲坛(2018年第五讲):Development of  high-performance structural systems for seismic applications
        报  告  人:Tony T.Y. Yang, Ph.D., P.Eng
                           Executive Director, Professor
                           International Joint Research Laboratory of  Earthquake Engineering
        报告时间:2018年4月25日 (星期三)下午14:30
        报告地点:东校区13教-C-120
        主 持 人:杜国锋教授
                
                         欢迎广大师生积极参加!
                                                                                                                
                                                                                                                                               城市建设学院
                                                                                                                                              2018年4月23日
 

Bio: Prof. Yang is a professor and the executive director for the International Joint Research Laboratory of Earthquake Engineering (ILEE). He received his B.Sc. (2001) and M.Sc. (2002) from the University of Buffalo, New York, and his Ph.D. from the University of California, Berkeley in 2006. His researches focus on the improving the structural performance through advanced analytical simulation and experimental testing. He has developed the next-generation performance-based design guidelines (adopted by the Applied Technology Council, the ATC-58 research team) in the United States; developed advanced experimental testing technologies, such as hybrid simulation and nonlinear control of shake table, to evaluate structural response under extreme loading conditions; developed risk-based simulation models for countries in the North and South America and the Global Earthquake Model (GEM) for the counties in the South East Asia. Prof. Yang’s research has been well applied to national and international research and code committees. He has been given over 50 invited speeches in many leading research institutes worldwide. Prof. Yang is one of the 19 voting members of the Standing Committee for Earthquake Design, which is responsible for writing the seismic design provision of the 2020 National Building Code of Canada (NBCC). Prof. Yang is also a committee member of S16, which is responsible for writing the seismic design provision of steel structures in the Canada. Prof. Yang is an active member of the Tall Buildings Initiative Project which has developed seismic design guidelines for tall buildings in the West Coast of United States. Prof. Yang’s work has been well recognized by his colleagues, he is the recipient of the 2014 CISC H.A. Krentz Award (highest research award given by the Canadian Institute of Steel Construction) and the 2011 Kwang-Hua Professor Title from Kwang-Hua Foundation, China.
Abstract: Recent earthquakes in Japan and New Zealand have shown that even the most developed countries with modern building codes still vulnerable to strong earthquake shaking. The issue lies in the fundamental approach in the structural design, where the earthquake energy is absorbed through inelastically deformation of the structural components. This design approach leads to unrecoverable structural damages and hefty social and financial losses. The loss due to earthquake can be minimized using high-performance earthquake resilient structures, where designated structural fuses, analogous to electrical fuses, are used to dissipate the sudden surge of earthquake energy. This design philosophy will achieve higher performance and allowing the structure to recover efficiently and economically after strong earthquake shaking. Innovative earthquake resilient structures has been developed in the past. However, there is a lack of practical design procedure that can be used by engineering design committee. In this presentation, a novel design procedure, named equivalent energy-based design procedure (EEDP) for fused structures in earthquake applications will be presented. EEDP allows engineers to select structure performance objectives when the structure is experiencing different levels of seismic shaking intensities. With the use of the developed methodology, engineers can efficiently select the structural member sizes to achieve the desire structural period, strength and deformation with simple hand calculation without iteration. Hence, it is very practical and useful for the seismic engineering design communities. Two innovative earthquake resilient structures named Linked Column Frame (LCF) and fused truss moment frames (FTMF) are designed using EEDP and presented. Nonlinear dynamic analyses were conducted to examine the performance of these two innovative fused structural systems. The result shows the proposed EEDP methodology is able to achieve the performance defined by the engineer, making this design procedure ideal for practicing engineering community where high-performance structural systems can be developed for seismic applications.