【摘要】 本文按有关规范的要求，结合大凌河桥的实际情况，分别计算在地震烈度为Ⅶ，Ⅷ和Ⅸ度情况下桥的周期、应力和位移等有关参数，给出了随桥架设的输油管线对桥体地震反应的影响程度。计算结果表明，在上述三种烈度情况下，桥体的破坏情况有所不同。更多还原

【Abstract】 According to the requirements of relative design standard and practice situation of Dalinghe bridge,we calculated the periods,stresses,displacements of the bridge under the intenesities of Ⅶ,Ⅷand Ⅸ respectively,and determined level of influence of the pipeline laid along the bridge on the bridge because of seismic response. The results show that the damage grades of the bridge are different under the intensities mentioned above更多还原