西安-宝鸡高速公路地震危险性评价

发布时间：2018-02-15 07:07

  本文关键词： 地震危险性 地震区带 潜在震源区 地震区划 结构物地震危险性　出处：《地震工程与工程振动》2017年02期 　论文类型：期刊论文

【摘要】：本文划分了西宝高速公路研究区域地震区带和潜在震源区,采用历史地震资料计算了地震活动性参数,在PGA衰减关系、地震危险性概率计算方法和场地地震动影响分析的基础上,计算了西宝高速公路未来50年超越概率2%、10%和63%的PGA分布,基于Arc GIS绘制了西宝高速公路地震危险性分区图;从设计地震危险性和实际地震危险性2方面总结了公路结构物地震危险性评价方法,开展了漆水河大桥、千河大桥、沣河大桥和渭河大桥等典型结构物的地震危险性评价。研究结果表明:西宝高速公路PGA跨越Ⅶ度和Ⅷ度基本烈度区,评价结果略高于我国第四代地震区划图,这是与渭河断陷盆地地震活跃的现实一致的;漆水河大桥和千河大桥的地震危险性是可控的,沣河大桥和渭河大桥的地震危险性不可控,应采取工程措施进行抗震加固。
[Abstract]:In this paper, the seismic zones and potential focal areas of Xibao Expressway are divided. The seismicity parameters are calculated by using historical seismic data, and the attenuation relationship in PGA is obtained. Based on the calculation method of seismic hazard probability and the analysis of site ground motion effect, the PGA distribution of 10% and 63% over the next 50 years for Xibao Expressway is calculated, and the seismic hazard zoning map of Xibao Expressway is drawn based on Arc GIS. In this paper, the evaluation methods of seismic risk of highway structures are summarized from the aspects of design seismic risk and actual seismic risk, and the Qishui River Bridge and Qianhe Bridge are carried out. The seismic risk assessment of typical structures such as Qianhe Bridge and Weihe Bridge. The results show that the basic intensity of PGA crossing 鈪，

本文编号：1512709