北京地区北东向主要活动断裂的地震工程效应评价

ASSESSMENT OF THE SEISMIC ENGINEERING EFFECT OF THE MAIN ACTIVE FAULTS ALONG NE DIRECTION IN BEIJING DISTRICT

活动断裂的地震工程效应评价是工程建设中急待解决的前沿课题。本文结合输油管线工程,根据地形交分析、弹性力学位错理论计算了50年的蠕滑量和沿管线附近的地面位移场和位移梯度场。

Seismic engineering effect of faults is one of the important contents in the antiseismic engineering study. Faults are almost always encountered by the lifeline engineering, but from the antiseismic point of view, the faults of disastrous effects are those faults which could cause damage earthquakes or creep.On the basis of the seismogeological background and the active features of four faults in the district, according to the essential parameters of the active faults and the maximum magnitude of the possible earthquake in the future fifty years, the displacement field and the displacement gradient field are calculated with the theory of elastic dislocation. And the creep values of the faults in the future fifty years are also evaluated in the light of the data of deformation survey across the faults in the past about thirty years.