公路地震灾害危险性评价
发布时间：2018-09-18 06:40
【摘要】：划分了西宝高速公路研究区域地震区带和潜在震源区,选取地震动峰值加速度(PGA)作为公路地震危险性评价指标,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研究区域未来50年内超越概率2%、10%和63%的PGA分布,绘制了地震危险性分区图。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。结果显示,西宝高速公路沿线区域跨越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]:The seismic zone and potential focal area of Xibao Expressway are divided. The peak acceleration of ground motion (PGA) is selected as the evaluation index of highway seismic risk. The attenuation relation of PGA is used to evaluate the seismic risk. Based on the calculation method of seismic hazard probability and the analysis of site ground motion effect, the PGA distribution of the transcendental probability of the Xibao Expressway study area in the next 50 years is calculated, and the seismic hazard zoning map is drawn. The methods of seismic hazard assessment of highway structures are summarized. The seismic hazard assessment of typical structures such as Qishui River Bridge, Qianhe Bridge and Weihe Bridge is carried out. The results show that the area along the Xibao Expressway spans the basic intensity areas of 鈪，
本文编号：2247091
[Abstract]:The seismic zone and potential focal area of Xibao Expressway are divided. The peak acceleration of ground motion (PGA) is selected as the evaluation index of highway seismic risk. The attenuation relation of PGA is used to evaluate the seismic risk. Based on the calculation method of seismic hazard probability and the analysis of site ground motion effect, the PGA distribution of the transcendental probability of the Xibao Expressway study area in the next 50 years is calculated, and the seismic hazard zoning map is drawn. The methods of seismic hazard assessment of highway structures are summarized. The seismic hazard assessment of typical structures such as Qishui River Bridge, Qianhe Bridge and Weihe Bridge is carried out. The results show that the area along the Xibao Expressway spans the basic intensity areas of 鈪，
本文编号：2247091
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