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反应谱离散性对梁桥概率地震需求预计的影响

Effects of Response Spectra Dispersion of Earthquake Ground Motions on Probabilistic Seismic Demand Assessment of Bridge Structures
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摘要 以一座三跨非规则钢筋混凝土连续梁桥为例,选择2组实际地震波作为输入地面运动,通过IDA分析探讨地震波反应谱的离散度对于梁桥结构概率地震需求预计的影响,得到以下结论:实际地震波的反应谱离散度与桥梁结构概率地震需求预计的离散度密切相关;针对基于概率理论的PBEE和PBSD,合理的选择实际地震波进行动力分析,可以使地震需求的概率分布更加符合实际情况,提高概率地震需求预计、易损性曲线等计算结果的精确性和计算效率。 A three-span regular continuous RC girder highway bridge and two bins of real accelerograms were selected for incremental dynamic analysis to study the correlation of the dispersions of response spectra of earthquake ground motions and probabilistic seismic demand assessments of bridge structures. It is found that the dispersions of seismic demands are closely related to the dispersions of response spectra of selected ground motions. The rational selection of real earthquake ground motions to be rationally chosen for dynamic analysis can make the probability distribution of seismic demands in accordance with the real situation and improve the computational precision and efficiency of the probabilistic seismic demand assessment and fragility curve for performance-based earthquake engineering and seismic design of bridges based on probability theory.
作者 章劲松 陈亮
机构地区 安徽交通职业技术学院土木工程系 合肥工业大学土木与水利工程学院
出处 《土木建筑与环境工程》 CSCD 北大核心 2013年第3期75-80,共6页 Journal of Civil,Architectural & Environment Engineering
基金 安徽省交通科技进步计划项目(201107) 安徽高校省级自然科学重点研究项目(KJ2012Z053) 中国博士后科学基金资助项目(2012M521219) 合肥工业大学博士专项科研资助基金项目(2011HGBZ1284)
关键词 桥梁 地震工程学 地震波 反应谱 概率地震需求预计 bridges earthquake engineering earthquake ground motion response spectra probabilisticseismic demand assessment
分类号 U442.5 [建筑科学—桥梁与隧道工程]
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参考文献20

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土木建筑与环境工程
2013年 第3期

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