| 基于性态的液化场地多跨桥梁桩基地震响应分析 |
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| 引用本文： | 惠舒清,唐亮,凌贤长,苏雷,李雪伟,满孝峰.基于性态的液化场地多跨桥梁桩基地震响应分析[J].世界地震工程,2022,38(1):158-166. |
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| 作者姓名： | 惠舒清 唐亮 凌贤长 苏雷 李雪伟 满孝峰 |
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| 作者单位： | 1 哈尔滨工业大学 土木工程学院, 哈尔滨, 150090;2 青岛理工大学 土木工程学院, 青岛, 266033 |
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| 基金项目： | 国家重点研发计划战略性国际科技创新合作重点专项(2016YFE0205100);国家自然科学基金面上项目(51578195和51608533);国家自然科学基金重点项目(41430634);黑龙江省应用技术研究与开发计划项目(GA19A501)。 |
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| 摘 要： | 针对液化场地多跨简支桩基桥梁体系，考虑地震随机性的不确定性和认知的不确定性，结合地震危险性曲线自身的不确定性，推导性态指标危险性曲线的解析表达式。利用地震动强度指标PGV/PGA，输入不同幅值的地震动，进行液化场地多跨桩基桥梁体系地震反应有限元分析。基于有限元数值分析结果，选取地震过程中关键位置位移和弯矩的最大值作为性态指标的响应，通过在双对数坐标下进行线性拟合，得到不同性态指标的地震需求模型和地震危险性曲线，进而分析其响应特性。此工作可为同类桥梁工程抗震设计提供必要的参考和借鉴。
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| 关 键 词： | 不确定性 地震响应 地震危险性曲线 地震需求模型 液化场地 |
Performance-based seismic response of the multi-span pile-supported bridge system in liquefiable soil |
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| HUI Shuqing,TANG Liang,LING Xianzhang,SU Lei,LI Xuewei,MAN Xiaofeng.Performance-based seismic response of the multi-span pile-supported bridge system in liquefiable soil[J].World Information On Earthquake Engineering,2022,38(1):158-166. |
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| Authors: | HUI Shuqing TANG Liang LING Xianzhang SU Lei LI Xuewei MAN Xiaofeng |
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| Affiliation: | 1 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2 School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China |
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| Abstract: | In order to describe the performance of the multi-span simply pile-supported bridge system in liquefiable ground，the analytic expression of the hazard curve of the performance index is derived，which takes into account the uncertainty of the seismic randomness，the uncertainty of cognition，and the uncertainty of the seismic hazard curve. The finite element model is performed through inputting base motions with different amplitudes. The seismic response of the multi-span simply pile-supported bridge system in liquefiable ground is carried out by using the ground motion intensity index PGV/PGA. Based on the results of finite element analysis，the maximum of displacement and bending moment in typical locations during the earthquake is selected. By the linear fitting in the log-log coordinate，the seismic demand model and seismic hazard curve for the different performance indexes are obtained， and then the response characteristics are analyzed. This work can provide necessary reference for the seismic design of similar bridge engineering. |
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| Keywords: | uncertainty seismic response seismic hazard curve seismic demand model liquefiable soil |
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