【摘要】 以某减震体系梁桥为研究对象,通过比较分析地震荷载单独作用和地震与爆炸组合作用下墩底的弯矩和支座的最大位移及残余位移,研究爆炸冲击对地震中受损的桥梁构件的影响。结果表明,地震后的爆炸冲击会瞬时增大桥墩的弯矩甚至使其屈服,导致屈服墩墩顶的支座残余位移增大50%以上。更多还原

【Abstract】 Taken an girder bridge with seismic isolation system as the research object,through analyzing the bending moment at the bottom of piers,the maximum displacement and residual displacement under earthquake compared to the combination of earthquake and explosion,the effect of blast to the damaged bridge structures in the earthquake is studied. The result shows that the blast could magnify the bending moment of piers instantly and even make them yield,which leads to an over 50% increase in the displacement of bearings at the top of the yielded piers.更多还原