密肋复合墙体框格试验及细观力学有限元分析  

Test study and micro-mechanics finite element analysis of grid in multi-ribbed slab wall

作　　者：常鹏[1] 姚谦峰[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《建筑结构学报》2009年第S2期13-18,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(50878021);十一五科技支撑项目(2006BAJ04A02-5)

摘　　要：密肋复合墙结构是近年来发展的一种新型建筑结构体系。作为结构的主要承力构件——密肋复合墙体是由密布的钢筋混凝土肋梁、肋柱及嵌固于其中的轻质砌块构成,其材性复杂,材料力学参数不易确定。为了确定轻质砌块及钢筋混凝土肋对墙体抗震性能的贡献,取出单个框格作为研究对象进行试验研究。在分析试验数据的基础上,提出用细观力学有限元法对密肋复合墙体的框格进行弹塑性结构分析,建立适用于密肋复合墙体的细观力学有限元模型。通过数值模拟与试验结果进行对比分析,结果表明:填充材料强度和混凝土肋的截面特性对框格承载能力和变形性能影响较大。Multi-ribbed slab structure(MRSS) is a new structural system developed in recent years.As the main bearing member of MRSS,the multi-ribbed slab wall(MRSW) is composed of reinforced concrete ribbed-beams,ribbed-columns and the embedded light blocks.Its material properties and mechanical parameters are complex and difficult to identify.To determine the contribution of the light blocks and the concrete ribs to the anti-seismic capability of the wall,the single box grid is studied through a set of tests.Based on the test data,the micro-mechanics finite element method was employed to perform an elastic-plastic analysis of the box grid.Micromechanics models suitable for MRSW were established.Comparing the numerical results with the available experimental data,the paper concludes that the strength of the infilled material and the section characteristic of RC ribs significantly affect the bearing capacity and the deformation performance of the single box grid.

关 键 词：密肋复合墙体 框格 试验研究 细观力学有限元 承载能力 变形性能 

分 类 号：TU399[建筑科学—结构工程]