砌体受压开裂过程数值模拟及其力学特性研究  

Numerical simulation of crack formation process and the mechanic characters of masonry structure

作　　者：王述红[1] 孙豁然[1] 张娟霞[1] 唐春安[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《哈尔滨工业大学学报》2006年第4期644-648,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50174013);中国博士后科学基金资助项目(2001-14-30);辽宁省自然科学基金资助项目(20021008);东北大学学科建设基金联合资助项目

摘　　要：为了研究砌体开裂过程的力学行为,提出利用现代计算机技术的数值试验方法,将砌体看成是由块体、砂浆和二者间的黏结带构成的三相复合材料,采用最大拉应力准则和摩尔库仑准则作为损伤本构关系的损伤阀值,建立砌体开裂数值模型,应用复合材料破裂过程数值分析系统MFPA2D(M aterial Failure Process A-nalysis),从应力场活动图像出发,模拟了砌体受压试件从损伤到开裂破坏的力学行为.研究表明,数值试验结果与试件物理实验结果较为吻合,为砌体开裂机理研究和发展、砌体力学性能研究提供了新的技术路径.A numerical test approach that is based on the computer technology and the heterogeneous characteristic of masonry structure material is introduced and used to investigate the failure process of masonry structure. In this numerical model, the masonry is assumed to be a three-phase composite composed of block, mortar and felt-strip between them. And a newly developed numerical code MFPA^2D （Material Failure Process Analysis） is used to simulate the whole failure process from crack initiation to failure for the masonry structure under compressive forces, with the maximum tensile strain criterion and Mohr-coulomb criterion are utilized as damage threshold. Good agreement is achieved between the results obtained by numerical simulation and experiment. It provides a new technical way for the study and development of the masonry structure theory and the mechanic properties of the masonry.

关 键 词：裂缝群开展与贯通 砌体开裂 应力场 不均匀性 

分 类 号：TU528[建筑科学—建筑技术科学]