(1华中科技大学土木工程与力学学院，武汉430074；2 机械工业部第三设计研究院，武汉430039） 

[摘要] 数值分析与建模是进行钢筋混凝土结构抗震性能研究的重要手段。为了保证钢筋混凝土结构数值建模的可靠性，本文以钢筋混凝土柱的拟静力试验为基础，在ABAQUS中对其进行基于纤维杆件单元非线性有限元模拟。考虑材料本构模型对结构数值模拟结果的影响，对两个拟静力试验柱分别建立了6个数值分析模型，计算结果表明：在选用合理混凝土与钢筋本构模型的条件下，纤维单元模型能够有效的模拟钢筋混凝土的滞回性能；在数值建模过程中可以忽略混凝土的抗拉强度；Kent-Scott-Park约束本构模型与Mander约束本构模型均能有效的模拟箍筋对混凝土的约束效应；相比于混凝土的本构模型，钢筋本构模型对模拟结果的影响更大，有必要对现有钢筋的本构模型进行更为细致全面的研究。

[关键字] 纤维模型;混凝土本构;约束混凝土;钢筋本构;ABAQUS;非线性滞回模拟

中图分类号：TU375.3       文献标识码：A         文章编号：1002-848X（2013）S1-1455-05

作者简介：卢怡思，硕士研究生，Email：luyisi_2007hust@sina.com。

Numerical Modeling Analysis for Pseudo-Static Experimental Columns

Lu Yisi¹, Zhang Yaoting¹, Xu Maohua²

(1 Huazhong University of Science and Technology, School of Civil Engineering and Mechanics, Hubei Wuhan 430074; 2 China CTDI Engineering corporation, Hubei Wuhan 430074)

Abstract：Numerical analysis and modeling are important means for the researches on the seismic performance of reinforced concrete structures. In order to guarantee the reliability of the numerical modeling of RC structures, studies were carried on experimental RC columns, nonlinear finite element simulations which based on fiber element were conducted in ABAQUS. Considering the influence of material constitutive model for structure numerical simulation results, 6 numerical analysis models were established respectively on two pseudo-static experimental RC columns, the results show that: In the condition of choosing reasonable constitutive models for steel and concrete, the hysteretic performance of RC columns can be simulated successfully in fiber element; Secondly, the tensile strength of concrete can be ignored in the process of numerical modeling; Thirdly, the confined concrete function by stirrup can be simulated effectively by Kent-Scott-Park model and Mander model; Finally, compared to the constitutive model of concrete, the constitutive model of reinforcement has more influences on the simulation results, it is necessary to proceed more meticulous and comprehensive studies on the existing constitutive model of reinforced.

Key word：Fiber Model; Constitutive Modeling of Concrete; Confined Concrete; Constitutive Modeling of Steel; Nonlinear Simulation of Hysteretic Behavior