框架结构变梁异型节点核芯区钢筋应力分析

Stress analysis of reinforced bar in core area of frame structure with variable beam section

运用大型有限元分析与设计软件ANSYS,对框架结构中的某一处变梁异型节点进行了在罕遇地震作用下的抗剪承载力影响分析。通过软件模拟并对比变梁异型节点核芯区在梁两侧截面高度不断变化的情况下,对比分析了节点核芯区内钢筋应力的变化以及其破坏形态。研究结果表明:梁端加载至节点破坏时,节点区内的钢筋应力分布极不均匀,而且随着梁高差的不断增大,这种作用表现的也越为明显。

In this paper,using large-scale finite element analysis and design software ANSYS,a bum in the beam of frame construction abnormal joints under the action of the rarely met earthquake shear bearing capacity of impact analysis.Through the software simulation and contrast change beam abnormal joints core area on both sides of beam section height under the condition of changing,contrast analysis of the core node reinforce-ment stress in the area and the failure pattern of change.The results show that the beam end loading damage to nodes,node uneven distribution of reinforcement stress in the studied area,and with the increase of test beam elevation difference,this effect is obvious.