跨断层桥梁抗震若干问题探讨

发布时间：2018-06-06 05:09

本文选题：桥梁 + 地表破裂　；参考：《地震工程学报》2017年05期

【摘要】：从断层时间尺度、活动性、场地效应等方面阐述跨断层桥梁的定义与内涵;从"功能性"、"制约性"、"地表破裂变异性"、"设计缺陷"4方面分析跨断层桥梁"不得不"面临较大的地震破坏风险的原因;最后以1979年Imperial Valley地震中El Centro台阵收集到的强震记录为基础,对断层破裂强震记录特征及地震动传播机理进行分析,研究断层两侧地面运动分布规律,建议跨走滑断层桥梁的地震动输入方向。本文研究结果对促进跨断层桥梁抗震设防具有借鉴意义。
[Abstract]:From fault time scale, activity, site effect and other aspects of cross-fault bridge definition and connotation; From the four aspects of "function", "constraint", "surface rupture variability" and "design defect", the paper analyzes the reasons why the cross-fault bridge "has to face the larger risk of earthquake damage;" Finally, based on the strong earthquake records collected by El Centro array during the Imperial Valley earthquake of 1979, the characteristics of strong earthquake records of fault rupture and the mechanism of ground motion propagation are analyzed, and the distribution of ground motion on both sides of the fault is studied. The input direction of ground motion across strike-slip fault bridge is suggested. The results of this paper can be used for reference to promote seismic fortification of cross-fault bridges.
【作者单位】：宁夏大学土木与水利工程学院;交通运输部公路科学研究院;
【基金】：宁夏自然科学基金项目(NZ16006) 宁夏大学高水平人才科研启动基金(BQD2015005)
【分类号】：U442.55

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