Material Model Incorporating Buckling of Reinforcing Bars in RC Columns
Material Model Incorporating Buckling of Reinforcing Bars in RC Columns
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DOI：
10.1061/(asce)st.1943-541x.0000808
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Z. Zong;S. Kunnath;G. Monti
中科院分区：
文献类型：
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作者：
Z. Zong;S. Kunnath;G. Monti
建立了一个有效的钢筋混凝土柱中钢筋的材料模型，该模型隐含地考虑了杆件屈曲的退化效应。利用作者提出的梁-弹簧模型来描述RC柱中的屈曲钢筋，进行了全面的参数研究，以确定几个重要的柱参数对RC柱中纵向钢筋屈曲性能的影响。总结了受压钢筋平均应力-应变曲线的特点。建立了基于纤维截面模型的钢筋混凝土结构非线性分析的本构关系。数值模拟的整体反应的实验测试RC柱的比较确认的有效性和实用性，建议的材料模型作为一个简单而有效的方法，包括杆屈曲效应的非弹性分析的RC框架结构。
An efficient material model was developed for reinforcing steel in reinforced concrete (RC) columns that implicitly incorporates the degrading effects of bar-buckling. Utilizing the beam-on-springs model developed by the writers to characterize a buckling bar in a RC column, a comprehensive parametric study was performed to identify the effects of several important column parameters on the buckling behavior of the longitudinal reinforcement in RC columns. Features of average stress-strain curves of compressively loaded reinforcing bars are summarized. Constitutive relations as functions of critical column parameters were developed for direct use in fiber-section model-based nonlinear analysis of RC structures. Comparison of the numerically simulated global response of experimentally tested RC columns confirm the validity and utility of the proposed material model as a simple and effective way to include bar-buckling effects in inelastic analysis of RC frame structures.