汶川地震断裂带附近建筑物的灾害效应模拟研究

位于汶川地震破裂带附近的汶川水磨镇硅业公司厂房在地震中产生了独特的破坏现象.根据现场调查和测绘资料, 建立了二维有限元模型, 进行了断裂带附近建筑物灾害效应的数值模拟.模拟结果很好地解释了厂房在地震中产生的独特破坏现象的机理.研究表明, 断层的形成改变了局部的应力场条件和加速度特征, 从而使位于断层上盘的楼房发生差异性破坏, 紧邻断层一侧破坏强烈.地震时楼体主梁的破坏是轴向应力和剪应力同时作用造成的. 

NUMERICAL STUDY ON THE HAZARD EFFECT OF A BUILDING NEAR THE FAULT PRODUCED BY THE WENCHUAN EARTHQUAKE

Particular destroy phenomena occurred in the main building of Shuimo Silicon Company near the fault produced by the 2008 Wenchuan earthquake. On the basis of site investigation, twodimensioanl finite element model is set up, and the hazard effect of a building caused by the faulting is simulated. The simulation result may be used to explain the mechanism for the formarion of the particular destroy phenomena of the building during the earthquake. It is thought that the formation of fault altered the local stress field and acceleration, thus led to the differential destroy of the building at the hanging wall of the fault which is characetrized by the stronger destroy near the fault. The destroy of the main beam is caused by the co-action of axial stress and shear stress.