| 基于IDA的基础不均匀沉降张弦梁结构的地震易损性分析 |
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| 引用本文： | 柳明亮,王常浩,张虎,何晴光,.基于IDA的基础不均匀沉降张弦梁结构的地震易损性分析[J].世界地震工程,2022,38(4):072-82. |
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| 作者姓名： | 柳明亮 王常浩 张虎 何晴光 |
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| 作者单位： | 1. 陕西省建筑科学研究院有限公司, 陕西 西安 710082;2. 兰州理工大学 甘肃省土木工程防灾减灾重点实验室, 甘肃 兰州 730050;3. 西部土木工程防灾减灾教育部工程研究中心, 甘肃 兰州 730050 |
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| 摘 要： | 基于IDA方法的地震易损性分析是目前一种较为常用的建筑结构抗震性能评价方法。选取15条地震动，三向作用于结构，对影响最大的两类支座分别施加200mm沉降量后的模型和未沉降模型基于IDA方法进行地震易损性分析。结果表明:在地震动强度较小时，短柱端支座沉降模型由于预应力增加会使结构相比与未沉降模型更加趋于稳定；当地震动强度较大时，短柱端支座沉降模型的破坏概率随着地震动强度的增加而迅速增加，此时未沉降模型的破坏概率将大幅低于另外两类模型。
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| 关 键 词： | 张弦梁结构 支座局部沉降 地震易损性分析 增量动力分析 地震动强度指标 |
Seismic vulnerability analysis of beam string structure with uneven foundation settlement based on IDA |
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| LIU Mingliang,WANG Changhao,ZHANG Hu,HE Qingguang,' target="_blank" rel="external">.Seismic vulnerability analysis of beam string structure with uneven foundation settlement based on IDA[J].World Information On Earthquake Engineering,2022,38(4):072-82. |
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| Authors: | LIU Mingliang WANG Changhao ZHANG Hu HE Qingguang " target="_blank">' target="_blank" rel="external"> |
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| Affiliation: | 1. Shaanxi Architecture Science Research Institute Co., Ltd, Xi’an 710082, China;2. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University-of Technology, Lanzhou 730050, China;3. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou 730050, China |
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| Abstract: | Seismic vulnerability analysis based on IDA method is a commonly used seismic performance evaluation method of building structures. The seismic vulnerability of the model and the model without settlement after applying 200 mm settlement to the two types of bearings with the greatest impact is analyzed based on IDA method. The results show that when the ground motion intensity is small,the increase of prestress caused by the settlement of short column end support slightly improves the stability of the structure compared with the non settlement model; When the local seismic intensity is large,the failure probability of the settlement model of the short column end support increases rapidly with the increase of the seismic intensity. At this time,the failure probability of the non settlement model will be significantly lower than that of the other two types of models. |
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| Keywords: | beam string structure local settlement of support seismic fragility estimation incremental dynamic analysis ground motion intensity index |
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