金沙江河门口大桥抗震性能分析

在桥梁设计时，应针对当地情况，专门进行桥梁抗震设计。金沙江河门口大桥位于Ⅶ度地震烈度区，抗震设防烈度为Ⅷ度，抗震设防措施为9级。根据该桥所处地的地震情况和抗震要求以及桥的具体情况，建立了桥梁的有限元模型，分析了几种地震波形条件下，桥梁的受力情况，找出塔柱根部为地震响应最大位置。针对桥梁受力情况，分析了加设阻尼器和不加设阻尼器情况下桥梁的位移。分析结果表明：增设阻尼器可以减小位移和弯矩的峰值，这有助于该桥的抗震设计。

Analysis on anti-earthquake feature of Hemenkou bridge on Jinsha river

Earthquake can cause severe damage of bridge,or produce catastrophic result,so,in the time of bridge design,special anti-earthquake design for bridge should be conducted according to local earthquake condition.Hemenkou bridge on Jinsha river is located at 7 degree earthquake area and its anti-earthquake design is that the bridge is not damaged for middle earthquake and it can be repair for large earthquake.Based on the local earthquake condition and anti-earthquake design requirement as well as concrete bri...