半刚性钢框架的直接分析方法理论研究

发布时间：2018-03-03 18:17

本文选题：半刚性钢框架　切入点：弯曲稳定函数单元　出处：《建筑结构学报》2014年08期 　论文类型：期刊论文

【摘要】：介绍了一种针对半刚性连接钢框架的直接分析法,该方法可以同时考虑结构和构件的初始缺陷、几何非线性(包括P-Δ,P-δ效应)、材料非线性以及半刚性连接(支座)对结构受力性能的影响。建立了可同时考虑初始缺陷、半刚性连接以及塑性铰的弯曲稳定函数单元(CSF单元),推导了CSF单元的二阶单元刚度矩阵,并扩展为三维单元刚度矩阵。采用弹簧单元对半刚性连接和塑性铰单元的非线性行为进行了模拟,确定了塑性铰出现的判断准则以及弹簧刚度的取值,定义了结构破坏准则。利用NIDA程序对3组半刚性连接框架结构进行了直接分析,并与试验结果进行了对比。对比分析表明:利用NIDA程序得到的结果与试验结果吻合较好,验证了直接分析法对半刚性连接钢框架进行结构分析的有效性和可靠性。
[Abstract]:This paper introduces a direct analysis method for semi-rigid connection steel frame. This method can take into account the initial defects of the structure and the member at the same time. The effects of geometric nonlinearity (including P- 螖 P- 未 effect, material nonlinearity and semi-rigid connection (bearing)) on the mechanical properties of the structure have been established, and the initial defects can be considered at the same time. The second order element stiffness matrix of CSF element is derived from the bending stability function element of semi-rigid connection and plastic hinge. The nonlinear behavior of semi-rigid connection and plastic hinge element is simulated by spring element, and the criterion of the appearance of plastic hinge and the value of spring stiffness are determined. The structural failure criterion is defined. Three groups of semi-rigid connection frame structures are analyzed directly by using NIDA program, and the results are compared with the test results. The comparison and analysis show that the results obtained by using the NIDA program are in good agreement with the test results. The validity and reliability of direct analysis for semi-rigid steel frame are verified.
【作者单位】：东南大学土木工程学院;合肥学院建筑工程系;香港理工大学土木及结构工程系;
【基金】：《钢结构设计规范》国家标准管理组科研专项课题
【分类号】：TU391

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