Yassin滞回模型的改进及混凝土结构地震分析应用  

Improvement of Yassin hysteretic model and its application in seismic analysis of RC structures

作　　者：李正 王维 孙治国 Li Zheng;Wang Wei;Sun Zhi-guo(School of Civil Engineering,Institute of Disaster Prevention,Sanhe 065201,China;Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China)

机构地区：[1]防灾科技学院土木工程学院,河北三河065201 [2]中国地震局建筑物破坏机理与防御重点实验室,河北三河065201

出　　处：《工程抗震与加固改造》2025年第2期1-8,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：中央高校基本科研业务费专项(ZY20220209);廊坊市科学技术研究与发展计划自筹经费项目(2022011041)资助。

摘　　要：修正了Yassin滞回模型,以《混凝土结构设计规范》(GB 50010-2010)给出的单轴应力-应变曲线为骨架曲线,组成混凝土实用单轴本构模型,并将其应用于钢筋混凝土结构的地震非线性分析。该模型不仅对混凝土在单调加载情况下拉压异性的力学特征描述具有较高的准确性,而且能对混凝土受压重复加卸载情况下的滞回特征有较合适的刻画。同时,也能较好地反应在拉压循环加载情况下,受拉裂缝闭合、受压刚度恢复效应以及受压损伤对受拉刚度劣化的影响。将所提出的本构模型通过通用有限元软件ABAQUS的用户材料子程序接口VUMAT进行了相应的编程,以集成到该软件中。然后以此为分析平台,对该本构模型的一些典型性能进行了不同荷载工况下的分析和验证。进而,利用本模型采用纤维梁柱单元对某钢筋混凝土高层框架结构进行了地震弹塑性损伤演化模拟分析。结果表明,该本构模型对钢筋混凝土结构的非线性地震损伤分析具有良好的适用性,可直观反映钢筋混凝土结构在地震作用下损伤演化的特征和破坏模式。Modified the Yassin hysteretic model,using the uniaxial stress-strain curve given in the‘Code for design of concrete structures’(GB 50010-2010)as the skeleton curve,to form a practical uniaxial constitutive model for concrete,and applied it to the seismic nonlinear analysis of reinforced concrete(RC)structures.Not only the tensile and compressive anisotropy of the concrete can be described accurately,but also the hysteretic loops under the repeated compressive loading can be depicted properly.The features that the compressive stiffness recovery due to crack closure and the tensile stiffness degenerates from compression to tension are also captured in the present model.A user subroutine of the present model is implemented in the FEA software Abaqus through the user material subroutine interface VUMAT.And some typical behaviors of the present model in different load cases are checked via this integrated analysis platform.In addition,the damage evolution of a high-rise RC frame structure is simulated under the action of earthquake using the fiber beam-column elements.The results indicate that the constitutive model has good applicability for nonlinear seismic damage analysis of RC structures,and can intuitively reflect the characteristics and failure modes of damage evolution of RC structures under earthquake action.

关 键 词：混凝土结构 本构模型 非线性分析 地震损伤 建筑结构 

分 类 号：TU375[建筑科学—结构工程] TU313