【摘要】：劃分了西寶高速公路研究區(qū)域地震區(qū)帶和潛在震源區(qū),選取地震動峰值加速度(PGA)作為公路地震危險性評價指標,在PGA衰減關(guān)系、地震危險性概率計算方法和場地地震動影響分析的基礎(chǔ)上,計算了西寶高速公路研究區(qū)域未來50年內(nèi)超越概率2%、10%和63%的PGA分布,繪制了地震危險性分區(qū)圖�？偨Y(jié)了公路結(jié)構(gòu)物地震危險性評價方法,開展了漆水河大橋、千河大橋、灃河大橋和渭河大橋等典型結(jié)構(gòu)物的地震危險性評價。結(jié)果顯示,西寶高速公路沿線區(qū)域跨越Ⅶ度和Ⅷ度基本烈度區(qū),評價結(jié)果略高于我國第四代地震區(qū)劃圖,這是與渭河斷陷盆地地震活躍的現(xiàn)實一致的;漆水河大橋和千河大橋的地震危險性是可控的,灃河大橋和渭河大橋的地震危險性不可控,應(yīng)采取工程措施進行抗震加固。
[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，

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