基于通用有限元程序和微平面模型分析复杂应力混凝土结构  

Analysis for Concrete Structures under Complicated Stress Conditions Based on General Purpose FE Software and Microplane Model

作　　者：缪志伟[1] 陆新征[1] 李易[1] 叶列平[1] 

机构地区：[1]清华大学土木工程系

出　　处：《沈阳建筑大学学报（自然科学版）》2008年第1期49-53,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家“十一五”科技支撑计划(2006BAK01A02);清华大学基础研究基金(JC2007003)

摘　　要：目的为了能准确模拟混凝土的各种复杂力学行为,从而对复杂应力混凝土结构进行准确分析.方法基于微观层次的混凝土本构模型——微平面模型原理,将其与具有优越非线性分析能力的通用有限元程序MSC.MARC相结合,开发了相关程序,并对混凝土在单轴、双轴、三轴、往复受力等各种应力状态下的行为和一片实际剪力墙的滞回加载进行了模拟分析计算.结果通过与相关试验结果的比较,验证了程序的可靠性,并指出了现有通用有限元程序在模拟复杂应力混凝土受力行为上的问题.结论本程序可较好地应用于分析复杂混凝土结构.In order to precisely simulate the complicated mechanical behavior of concrete so as to accurately model the real complex concrete structures, a novel concrete constitutive model-microplane model, is introduced and integrated into the general purpose finite element （FE） software of MSC. MARC which has outstanding nonlinear capacity. Concrete specimens under uniaixial, biaxial, triaxial and cycle loading are simulated with the proposed program as well as a reinforced concrete （RC） shear wall under cycle loading. Com- paring the numerical predictions of proposed program with the test results, good agreements can be found. And the problems of concrete models in common FE software are pointed out, when they are used to simulate complicated concrete mechanical behaviors. The results show that the proposed program can precisely simulated the complicated concrete structures.

关 键 词：混凝土有限元 微平面模型 宏观本构模型 非线性分析 

分 类 号：TU375[建筑科学—结构工程]