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建筑抗震评价方法英文文献和中文翻译(4)

时间:2017-05-18 22:48来源:毕业论文
is selected to illustrate the collapse risk assessment process. The six-story building is 22.6 m in height, with a seismic fortification category of C, and it is located on a site with a seismic forti


is selected to illustrate the collapse risk assessment process.
The six-story building is 22.6 m in height, with a seismic
fortification category of C, and it is located on a site with a
seismic fortification degree of seven (for which the corre-
sponding peak ground acceleration, PGA, corresponding to
a 10% exceedance probability in 50 years, is 0.10 g) and a
site classification of II. The structure is designed in accord-
ance with the Chinese Code for Seismic Design of Build-
ings (GB50010-2010) [9]. A detailed description of its
seismic design can be found in the study by Shi et al. [5].
4.2  Collapse fragility analysis
Nonlinear finite element modeling and IDA are performed
using TECS (Tsinghua Earthquake Collapse Simulation)
[14–18], a program developed based on the general-purpose
finite element software MSC. MARC for collapse simula-
tion of complex structures. The collapse fragility analysis
adopts the 22 far-field ground motion records proposed in
the FEMA 695 report [11]. The spectral acceleration at the
fundamental period Sa(T1) is selected as the intensity meas-
ure [4, 5, 19]. The collapse criterion is defined as the struc- 摘要: 建筑结构的抗震设计、尤其是抗倒塌能力设计目标应根据其所在场地未来一定设计使用年限内可能遭遇的地震危险性来设定。首先介绍了基于动力增量分析( IDA) 的结构倒塌易损性分析方法,随后结合地震危险性分析,分别给出了结构抗倒塌能力和结构所面临地震危险性的概率模型,进而根据结构在未来一定设计使用年限内的倒塌概率,对建筑结构的抗地震倒塌风险进行定量评价,并给出了相应的计算方法。以一座7度抗震设防的RC 框架结构为例,计算了该RC 框架结构在3个同为7度抗震设防而地震危险性不同地区的地震倒塌风险,指出仅以抗震设防烈度作为建筑结构抗震设计的依据所存在的不足,建议应基于一致倒塌风险进行结构抗震设计,并提出了相关结构抗震设计方法需开展的研究工作。
关键词: 建筑结构; 地震需求; 结构倒塌易损性; 地震危险性; 一致倒塌风险
1 引言
强烈地震作用下建筑结构的倒塌破坏是造成人员伤亡和财产损失的主要原因,保证强震作用下建筑结构的抗倒塌能力是抗震设计的核心目标。近年来基于动力增量分析的倒塌易损性分析方法,可以更合理地评价强震作用下建筑结构的抗倒塌能力。基于结构倒塌易损性评价结果,进一步结合建筑结构所在场地的地震危险性,能够定量评价建筑结构在未来设计使用年限内可能遭遇的地震倒塌风险,从而实现基于一致倒塌风险的结构抗震设计。所谓一致倒塌风险是指在未来给定设计基准期内,对不同地震风险场地上的建筑结构,其地震倒塌风险一致、并控制在可接受范围内。地震倒塌风险采用倒塌概率定量评价。 建筑抗震评价方法英文文献和中文翻译(4):http://www.youerw.com/fanyi/lunwen_7390.html
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