Earthquakes and Structures

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Analysis of seismic mid-column pounding between low rise buildings with unequal heights

  • Jiang, Shan (School of Civil Engineering, Qingdao University of Technology) ;
  • Zhai, Changhai (School of Civil Engineering, Harbin Institute of Technology) ;
  • Zhang, Chunwei (School of Civil Engineering, Qingdao University of Technology) ;
  • Ning, Ning (School of Civil Engineering, Qingdao University of Technology)
  • Received : 2018.02.27
  • Accepted : 2018.07.08
  • Published : 2018.10.25
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Abstract

Floor location of adjacent buildings may be different in terms of height elevation, and thus, the slab may hit on the columns of adjacent insufficiently separated buildings during severe ground motions. Such impacts, often referred to as mid-column pounding, can be catastrophic. Substantial pounding damage or even total collapse of structures was often observed in large amount of adjacent low rise buildings. The research on the mid-column pounding between low rise buildings is in urgency need. In present study, the responses of two adjacent low rise buildings with unequal heights and different dynamic properties have been analyzed. Parametric studies have also been conducted to assess the influence of story height difference, gap distance and input direction of ground motion on the effect of structural pounding response. Another emphasis of this study is to analyze the near-fault effect, which is important for the structures located in the near-fault area. The analysis results show that collisions exhibit significant influence on the local shear force response of the column suffering impact. Because of asymmetric configuration of systems, the structural seismic behavior is distinct by varying the incident directions of the ground motions. Results also show that near-fault earthquakes induced ground motions can cause more significant effect on the pounding responses.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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