采用铁皮网加固片石砌体的抗震性能有限元分析

石砌体结构是由石块和砂浆2种性质截然不同的材料砌筑而成的,由于二者之间粘结力的薄弱,严重影响了石砌体结构的抗震性能.为此建立了3种模型,分别为普通石砌体墙,铁皮方格网加固石砌体墙和铁皮斜格网加固石砌体墙.通过有限元软件ANSYS对3种模型进行伪静力模拟分析,分别得出各自的滞回曲线、骨架曲线等抗震性能指标.通过对比可知,普通石砌体墙的抗震性能比较差,铁皮网加固后的石砌体墙的耗能能力、延性、整体性等抗震指标都有一定程度的提高,铁皮网加固石砌体是一种施工方便、经济可行的方法.

The Finite Element Analysis of the Seismic Behavior of Rubble Masonry Strengthened by Iron Sheet Grid

Stone masonry structure is made of stone and mortar, whose characteristics are completely diverse. The seismic performance of stone structure is seriously affected by the weak adhesive force of stone and mortar. Three models are built for it,including the ordinary rubble masonry wall,iron-sheet square- grid reinforced rubble masonry wall and iron-sheet diagonal-grid reinforced rubble masonry wall. Three models are simulated by Pseudo-static analysis through the finite element software ANSYS. Some seismic characteristics are obtained respectively such as hysteresis curves and skeleton curves. By contrast, we could see that ordinary rubble masonry wall is poor in the seismic performance. The seismic performance （such as the energy dissipation capacity,ductility, integrity,etc. ） of iron-sheet grid-reinforced rubble masonry wall has been improved to some degree. The latter is a convenient, economic, and effective method.