第38卷第2期 2016年4月
土木建筑与环境工程
Journal of Civil.Architectural &. Environmental Engineering
doi:10.11835/j.issn.1674-4764. 2016. 02. 007
Vol. 38 No. 2 Apr.2016
采用块体-界面体系的砌体结构简化细观模型
牛力军，张文芳，丁瑞彬
（太原理工大学建筑与土木工程学院，太原030024）
摘要：基于ABAQUS装配式建模构架，提出了一种砌体结构的简化细观模型。该建模方法将块体一砂浆界面及砂浆层统一采用块体间的界面来代替。界面属性包括法向和切向的力学参数，用来模拟动体的剪压及受拉行为。界面的法向受拉采用粘性力学参数赋值，并通过与轴心受拉本构模型的等效，推导得出控制界面损伤演化速率的无量纲指数α的计算方程。剪压复合受力模型基于剪摩理论建立，通过粘性属性和库伦摩擦赋值。当剪压复合受力构件处于高轴压比时，通过块体的非线性属性实现了主压应力为主控的损伤阅值。按照该方法进行剪压相关性和砖墙剪切失效的试
验仿真模拟，模拟得出的失效形态及力一位移曲线与试验结果基本相符。关键词：砌体；细观模型；剪摩理论；粘性摩擦；数值模拟
中图分类号：TU313.2
文献标志码：A
文章编号：1674-4764(2016)02-0051-09
Amesoscopicmodelofmasonrystructurewithblock-interfacesystem
Niu Lijun,Zhang Wenfang,Ding Ruibin
(College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China)
Abstract,Based on the modular modeling framework of ABAQUS program, a simplified mesoscopic model is proposed for masonry structure. The mortar-joint and bond were replaced by a single interface. Shear compression behaviour and tension behaviour were modeled through the normal and tangential mechanics properties of interface. Sticking mechanics property was adopted to model tensile behavior, and the evolution index aof bonding soft was obtained by equivalent with axial tensile constitutive express. Based on shear-friction theory, shear-compression model was conducted by sticking mechanics and coulomb friction, and through the nonlinear properties of block, the principal compression stress was adopted as the master damage threshold under high axial compression ratio. Simulation of the shear-compression relationship and a brick wall model with shear failure were conducted, and the corresponding failure modes and curves were similar with that theory and test results.
Keywords:masonry; mesoscopic model; shear-fiction theory; sticking friction; simulation
收稿日期：2015-09-06
基金项目：国家自然科学基金（50978177）；山西省科技攻关项目（20110313026-3)
作者简介：牛力军（1978-），男，博士生，主要从事工程结构抗震减震设计理论研究，（E-mail）niulijun@tyut.edu.cn。
张文芳（通信作者），男，教授，博士，（E-mail）zhangwenfang@tyut.edu.cn。
Received:2015-09-06
Foundation item: National Natural Science Foundation of China ( No, 50978177); Natural Science Foundation of Shanxi
Province (No. 201103130263)
Author brief: Niu Lijun(1978-), PhD candidate, main research intrest: theory research on seismic engineering structures
(E-mail) niulijun@tyut. edu. cn.
Zhang Wenfang(corresponding author), professor, PhD, (E-mail)zhangwenfang@tyut. edu. cn