摘要
为了提高工程结构非线性的计算精度,研究了OpenSEES程序中的纤维模型,以多梁式简支T梁桥为背景,建立体系的纤维模型,通过偏载、中载、均匀加载三种方式,分析各片主梁的材料非线性变化过程.在偏载加载方式下,数值模拟的各主梁荷载-位移,以及荷载-钢筋应力曲线分别与破坏性试验数据进行了对比分析.结果表明,模拟的误差很小,两者结果相吻合,说明OpenSEES有限元的纤维模型分析非线性具有更高的精度和优越性.
In order to improve the nonlinear accuracy of engineering structure, the fiber model of OpenSEES program is studied. Taking the multi-beam reinforced concrete as an example, fiber model is established to analyze the changing process of material nonlinear with each beam through the partial, middle and uniform load. In the partial load mode, the numerical data of load-midspan displacement and load-steel stress is compared with the destructive test data. The results show the simulation error is very small, and the numerical data is consistent with the test data, which shows that analyzing material nonlinearity with the fiber element of OpenSEES finite program has higher accuracy and superiority.
出处
《武汉理工大学学报（交通科学与工程版）》
2016年第1期80-84,88,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
中央高校基本科研业务费资助(批准号:2013G1211010)
关键词
桥梁工程
纤维模型
材料非线性
多梁式钢筋混凝土
本构关系
bridge engineering
fiber model
material nonlinearity
multi-beam reinforced concrete constitutive relationship
