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从“5.12汶川大地震”及世界范围的工程结构物震害情况看,在强震条件下,隧道工程震害依然较突出,合适的抗震设计方法是工程界共同面临的课题。当前进行抗震设计计算的拟静力方法主要有地震系数法与反应位移法,文章结合工程实例阐述了两者的基本原理。通过改变埋深、地震烈度和偏压等参数,对隧道受力情况进行了计算,对比分析两种方法的计算结果,就其适用性进行了探讨和研究。
From the “5.12 Wenchuan Earthquake” and the damage caused by the engineering structures worldwide, the seismic damage of tunnel projects is still outstanding under strong earthquake conditions. Appropriate seismic design methods are the common problems facing the engineering community. At present, the quasi-static methods for seismic design calculation mainly include seismic coefficient method and reaction displacement method. The article expounds the basic principle of the two together with engineering examples. By changing the parameters of depth, seismic intensity and bias and so on, the stress of the tunnel is calculated, the results of the two methods are compared and analyzed, and the applicability of the method is discussed and studied.