周海涛^1,2，张毅刚^1,3，吴金志¹，刘文超¹
    （1 北京工业大学大跨空间中心，北京100124; 2 河南城建学院，平顶山467001; 3 北京工业 大学城市与工程安全减灾省部共建教育部重点实验室，北京100124）

[摘要] 大跨空问结构灾变的精确化分析的基础和关键是精确化数值材料本构模型的建立，在单向拉伸应力应变曲线的基础上，把材料软化效应、材料硬化效应和损伤效应三者有机的结合，提出了一种新的三线性材料数值模型，并开发了相应的适用于梁单元的计算方法，通过单向拉伸试验算例和悬臂柱双向水平试验算例的仿真计算证明该材料模型和算法正确。
[关键词] 全过程；材料软化；三线性；硬化效应

Material model with intenerating effect considered
Zhou Haitao^1,2,  Zhang Yigang^1,3,  Wu Jinzhi¹,  Liu Wenchao¹
(1 Spatial Structures Research Center of BJUT, Beijing 100124, China; 2 Hernan University of Urban Construction, Pingdingshan 467001, China; 3 Key Lab. ofUrban Security and Disaster Engineering, MOE,  Beijing 100124, China)

Abstract: Precise analysis on large-span spatial structures depends on accurate numerical material constitutive model, According to the axial tension stress-strain curve, the paper proposes a new numerical multiline material model, with material effects of intenerating effect, material hardening effect and damage effects considered, and  corresponding calculation method applicable to beam element. Simulation of axial tension test and bi-level loading test on cantilever column proves that the material model and algorithm are effective and correct.
Keywords: whole process;  materialintenerating;  multiline;  hardening effect