Quantitative investigation on collapse margin of steel high-rise buildings subjected to extremely severe earthquakes

作     者：Lin Xuchuan Mikiko Kato Zhang Lingxin Masayoshi Nakashima 

作者机构：Key Laboratory of Earthquake Engineering and Engineering VibrationInstitute of Engineering MechanicsChina Earthquake AdministrationHarbinChina Nikken Sekkei LTD.OsakaJapan Kyoto UniversityKyotoJapan Kobori Research ComplexTokyoJapan 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2018年第17卷第3期

页      面：445-457页

核心收录：

学科分类：081405[工学-防灾减灾工程及防护工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0802[工学-机械工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Heilongjiang Province Application Technology Research and Development under Grant No.GX16C007 National Key Research and Development Program of China under Grant No.2017YFC1500605 

主　　题：collapse quantification steel high-rise building numerical models local buckling collapse mechanism 

摘      要：Reponses of structures subjected to severe earthquakes sometimes significantly surpass what was considered in the *** is important to investigate the failure mechanism and collapse margin of structures beyond design,especially for high-rise *** this study,steel high-rise buildings using either square concrete-filled-tube（CFT） columns or steel tube columns are designed.A detailed three-dimensional（3 D） structural model is developed to analyze the seismic behavior of a steel high-rise towards a complete *** effectiveness is verified by both component tests and a full-scale shaking table *** collapse margin,which is defined as the ratio of PGA between the collapse level to the design major earthquake level（Level 2）,is quantified by a series of numerical simulations using incremental dynamic analyses（IDA）.The baseline building using CFT columns collapsed with a weak first story mechanism and presented a collapse margin ranging from 10 to *** significant variation in the collapse margin was caused by the different characteristics of the input ground *** building using equivalent steel columns collapsed earlier due to the significant shortening of the locally buckled columns,exhibiting only 57% of the collapse margin of the baseline *** influence of reducing the height of the first story was quite *** shortened first story not only enlarged the collapse margin by 20%,but also changed the collapse mode.