Identification and variation of story lateral stiffness in buildings

Hong Li-Ling, Huang Lee-Hui, Jhou Wun-Yan

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

A sensitivity study is first performed on some damage indices of simple building systems. It is shown that the maximum softening index composed of the fundamental vibration period becomes insensitive to damage severity when damage occurs in high-rise buildings or at the upper stories of buildings. Directly identifying the story lateral stiffness is then necessary in order for damage diagnosis. Through a nonlinear regression analysis to the total sum of squares of the errors between recorded and predicted accelerograms, story parameters are identified using a model of shear building or non-shear frame in the case of full measurement. When the beams of a frame are not rigid, using the story stiffness reduction, indices from the identified results of a shear frame model to assess damage will underestimate the damage severity at the lower stories but overestimate that at the upper stories. In the case of incomplete measurement, an equivalent system with less number of degree-of-freedoms is proposed to identify the story lateral stiffness. The damage location and severity of an original system can be reasonably assessed by the identified story stiffness reduction indices of the equivalent system. Finally, the equivalent story lateral stiffness coefficients of a real building triggered by several events are identified to view their variations before and after a powerful earthquake.

原文English
頁(從 - 到)200-222
頁數23
期刊Structural Control and Health Monitoring
16
發行號2
DOIs
出版狀態Published - 2009 三月 1

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials

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