摘要
目的为准确模拟地震作用下钢筋混凝土梁柱构件的弹塑性受力特性,解决ABAQUS软件显式分析模块缺乏用于三维梁单元的混凝土本构模型及钢筋本构模型的问题.方法采用的混凝土单轴本构模型考虑了箍筋对混凝土的约束影响以及混凝土裂面效应的影响,钢筋单轴本构模型合理考虑了Bauschinger效应,利用ABAQUS用户子程序接口VUMAT进行二次开发,编制了用于显式动力分析的梁单元混凝土、钢筋本构模型的计算程序,并对往复荷载下钢筋混凝土柱受力性能进行了数值模拟.结果通过与ABAQUS自带的钢筋本构模型对比,验证了采用笔者给出的混凝土与钢筋本构模型能够较好地反映钢筋混凝土柱在低周往复荷载作用下的滞回性能以及双向弯曲耦合性能.结论数值模拟结果与试验结果吻合良好.笔者开发的混凝土、钢筋本构模型能够用于混凝土梁柱构件在复杂受力状态下的动力非线性响应分析.
There is no concrete constitutive model and reasonable steel constitutive model in the explicit analysis module of ABAQUS for spatial beam element.In this paper,the uniaxial constitutive model of concrete and steel is established in order to precisely simulate the nonlinear performance of RC column-beam members under seismic loads.The restraint effect of stirrup and the crack surface effect of concrete are included in the purposed concrete constitutive model.Bauschinger effect is also considered in the uniaxial constitutive model of steel.The material subroutines of these models are simultaneously developed and applied to the explicit dynamic module of ABAQUS by means of user-defined subroutine interface（VUMAT）.In addition,the hysteretic performance of RC columns under cyclic loading is numerically simulated.Compared with the steel constitutive model of ABAQUS,the results show that the model of this paper can more rightly simulate the hysteretic performance of RC columns under the multiaxial load.Especially the biaxial bending coupling effect of the speciments is analyzed accurately.The established models can meet the demand for analyzing the nonlinear dynamic response of RC column-beam element under the multiaxial loading conditions.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2013年第1期56-64,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51178279)
沈阳市科学技术计划项目(F10-193-5-45)
