Analytical investigation of the role of reinforcement in perpendicular beams of beam-column knee joints by 3D meso-scale model
Analytical investigation of the role of reinforcement in perpendicular beams of beam-column knee joints by 3D meso-scale model
复制标题
梁柱膝关节垂直梁中钢筋作用的3D细观模型分析研究
DOI：
10.1016/j.engstruct.2020.110347
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发表时间：
2020
影响因子：
5.5
通讯作者：
Kohei Nagai
中科院分区：
文献类型：
--
作者：
Liyanto Eddy;Punyawut Jiradilok;Koji Matsumoto;Kohei Nagai
本文对机械锚固梁柱膝关节垂直梁中钢筋的作用进行了分析研究。使用3D刚体弹簧模型（3D RBSM）进行计算机模拟，考虑钢筋多向布置的影响，对RC梁柱节点进行分析。仿真结果为理解宏观行为提供了有益的信息，因为可以研究内应力和裂纹条件。在本研究中，梁柱节点模拟模型在钢筋数量上有所不同，以研究钢筋在垂直梁中的作用。仿真结果表明，在垂直梁中增加钢筋可以提高承载力。通过数值模拟研究内应力和裂缝，垂直梁中纵向钢筋的作用是利用钢筋的多层啮合和局部应变分布获得的销钉作用，将应力从节点传递到垂直梁上。最终，这项研究还表明，3D RBSM 可以成为基于具体情况分析钢筋多向布置的 RC 梁柱节点的有用工具，而设计规范和传统数值方法无法解决这一问题。
This paper presents an analytical investigation of the role of the reinforcing bars in the perpendicular beams of beam-column knee joints with mechanical anchorages. A computer simulation using 3D Rigid Body Spring Model (3D RBSM) is used for the analysis of RC beam-column joints in consideration of the effect of multidirectional arrangement of reinforcing steels. Simulation results provide beneficial information for understanding the macroscopic behavior because the internal stresses and crack conditions can be investigated. In this study, the beam-column joint simulation models are varied in the number of reinforcements to study the role of the reinforcing bar in perpendicular beam. Simulation results show that the capacity can be increased when reinforcing bars are added in the perpendicular beams. Through the study of the internal stresses and cracks using numerical simulation, the function of the longitudinal reinforcement in the perpendicular beams is to transfer the stresses from the joint to the perpendicular beams by means of the dowel action which is obtained by utilizing the multiple layers meshing of reinforcement and the local strain distribution. Ultimately, this research also shows that 3D RBSM can be a useful tool for the analysis of the RC beam-column joints with multidirectional arrangement of reinforcing steels based on a case-by case basis that cannot be addressed by the design code and conventional numerical methods.