Analytical modeling of nonlinear behavior of composite bridges
Analytical modeling of nonlinear behavior of composite bridges
复制标题
组合桥梁非线性行为的分析建模
DOI：
10.1061/(asce)0733-9445(1990)116:6(1715
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
M. Nofal
中科院分区：
文献类型：
--
作者：
A. G. Razaqpur;M. Nofal
描述了用于钢和混凝土结构非线性分析的一般有限元程序的各个方面。该程序说明了混凝土，钢和剪切连接器的非线性行为。混凝土被视为一种正交各向异性非线性材料。等效应变的概念用于建立正交异性方向上独立的应力-应变关系。将钢作为弹塑性应变硬化材料进行建模，采用经典塑性理论和von Mises破坏准则。对于剪力连接件，采用经验非线性剪力-滑移关系。通过对两座组合梁和一座多梁桥在整个荷载范围内直至失效的分析，证明了该程序的准确性和可靠性。分析结果与相应的实验和/或现场数据进行了比较，两者吻合良好。结果表明，该方法的可行性和可靠性。
Various aspects of a general finite‐element program for the nonlinear analysis of steel‐and‐concrete structures is described. The program accounts for the nonlinear behavior of concrete, steel, and shear connectors. Concrete is treated as an orthotropic nonlinear material. The concept of equivalent strain is used to establish independent stress‐strain relationships in the directions of orthotropy. Steel is modeled as an elastoplastic strain‐hardening material, and classical theory of plasticity together with the von Mises failure criterion is applied. For shear connectors, an empirical nonlinear shear force—slip relationship is used. The accuracy and reliability of the program are demonstrated by the analysis of two composite beams and a multigirder bridge over the entire loading range up to failure. The analytical results are compared with the corresponding experimental and/or field data with good agreement between the two. The reported results demonstrate the feasibility and reliability of the nonlinear...