Earthquakes and Structures

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Quantifying the seismic resilience of two tall buildings designed using Chinese and US Codes

  • Tian, Yuan (Beijing Engineering Research Center of Steel and Concrete Composite Structures, Tsinghua University) ;
  • Lu, Xiao (Department of Civil Engineering, Beijing Jiaotong University) ;
  • Lu, Xinzheng (Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University) ;
  • Li, Mengke (Beijing Engineering Research Center of Steel and Concrete Composite Structures, Tsinghua University) ;
  • Guan, Hong (Griffith School of Engineering, Griffith University Gold Coast Campus)
  • Received : 2016.01.19
  • Accepted : 2016.08.02
  • Published : 2016.12.25

Abstract

With ongoing development of earthquake engineering research and the lessons learnt from a series of strong earthquakes, the seismic design concept of "resilience" has received much attention. Resilience describes the capability of a structure or a city to recover rapidly after earthquakes or other disasters. As one of the main features of urban constructions, tall buildings have greater impact on the sustainability and resilience of major cities. Therefore, it is important and timely to quantify their seismic resilience. In this work, a quantitative comparison of the seismic resilience of two tall buildings designed according to the Chinese and US seismic design codes was conducted. The prototype building, originally designed according to the US code as part of the Tall Building Initiative (TBI) Project, was redesigned in this work according to the Chinese codes under the same design conditions. Two refined nonlinear finite element (FE) models were established for both cases and their seismic responses were evaluated at different earthquake intensities, including the service level earthquake (SLE), the design-based earthquake (DBE) and the maximum considered earthquake (MCE). In addition, the collapse fragility functions of these two building models were established through incremental dynamic analysis (IDA). Based on the numerical results, the seismic resilience of both models was quantified and compared using the new-generation seismic performance assessment method proposed by FEMA P-58. The outcomes of this study indicate that the seismic resilience of the building according to the Chinese design is slightly better than that according to the US design. The conclusions drawn from this research are expected to guide further in-depth studies on improving the seismic resilience of tall buildings.

Keywords

Acknowledgement

Supported by : National Key Technology R&D Program

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