摘要
为了能更简单有效地研究无筋砌体墙的平面外受力性能,采用严格匀质化方法对无筋砌体墙进行了数值模拟分析。取一个对应于试验砌筑方式的等效体积单元(Representative Volume Element,简称RVE),采用ABAQUS有限元分析软件对砌体RVE进行模拟,将砖块和砂浆的几何特性等效,得出RVE等效弹性常数。再采用ABAQUS对2片砖墙进行平面外数值模拟,有限元分析结果与试验结果吻合良好,验证了匀质化方法应用于无筋砌体墙平面外性能的合理性。在此基础上,分析了无筋砌体墙在不同墙体高度、墙体顶部竖向压应力、墙体厚度、墙体高宽比下平面外极限荷载的影响。研究结果表明,减小墙高、加大顶部竖向压应力、增大墙体厚度、减小高宽比均能提高墙片平面外极限荷载,其中,增大墙体厚度最能有效地提高平面外极限荷载。
In order to study out-of-plane properties of unreinforced masonry more easily and effectively,this paper uses the rigid homogenization method to simulate the unreinfor-ced masonry wall.ABAQUS finite element analysis software was used to simulate the RVE corresponding to the masonry methods of the experiment,the geometric proper-ties of the bricks and mortar were equivalent,and the equivalent elastic constants of RVE are obtained.ABAQUS was used to simulate the out-of-plane properties of two pieces of brick wall,and the well agreements between the finite element analysis and experimental results indicate that the rationality of the rigid homogenization method apply to out-of-planeproperties of unreinforced masonry.On the basis of this,this paper analyzes the inf-luences of different wall height,wall thickness,vertical compression stress on the top of wall and the height and width ratio of wall on the out-of-plane limit load of unreinforced masonry,the analysis shows that reducing the wall height,increasing the vertical compre-ssion stress at the top,increasing the thickness of the wall and reducing the height of the wall can increasethe out-of-plane limit load,among them increasing the wall thickness can effectively increase the out-of-plane limit load,which provides reference for the study on out-of-plane of m asonry.
作者
杨春侠
李谧
李晨依
YANG Chun-xia;LI Mi;LI Chen-yi(School of Civil Engineering,Changsha Universityof Science and Technology,Changsha 410114,China)
出处
《长沙理工大学学报（自然科学版）》
CAS
2018年第2期67-73,共7页
Journal of Changsha University of Science and Technology:Natural Science
基金
国家自然科学基金资助项目(51678067)
关键词
严格匀质化方法
RVE
无筋砌体墙
平面外
有限元分析
数值模拟
rigid homogenization method
RVE
unreinforced masonry
out-of-plane
finite element analysis
numerical simulation
