强震区桥台岸坡震动滑移破坏机理研究

针对汶川地震中大量桥梁岸坡出现滑移破坏现象,对地震作用下桥台岸坡滑移进行了理论研究.根据米塞斯流动法则,得到地震作用下桥台岸坡滑动面应变速度以及与滑动线夹角,据此得出作用于岸坡各外力做功和塑性流动消耗的能量,依据外力所做功与内部消耗能量相等的原则,最终推导出岸坡最大地震主动土压力及所对应滑动面倾角,将能量耗散理论与岸坡...

Failure Mechanism of Abutment Slope Sliding in Meizoseismal Area

Aiming at the phenomenon a large number of abutment slopes have sliding failure in Wenchuan Earthquake,a theoretic study of abutment slope sliding under seismic effect is carried out.According to Mises flow rule,the abutment slope sliding velocity as well as its angle between sliding lines under earthquake are obtained.In that case,the energy consumption of the work force acting on the slope and the plastic flow is obtained.And then,on the basis of principle that the work done by external forces is equivalent to internal energy consumption,the maximum slope seismic active earth pressure and the corresponding angle of sliding surface are finally got.Integrating the energy dissipation theory and the dynamic response to slope slide,the safety assessment of slope sliding under seismic effect is carried out.