CAJ | 학술논문

为考察外伸端板连接中不同端板厚度、螺栓直径、螺栓布置对节点受力性能以及端板强度的影响,采用有限元数值分析软件ANSYS建立半刚性端板连接节点模型进行非线性有限元分析.在建立模型和计算分析过程中考虑了弹塑性、大变形和接触问题.分析结果表明:端板厚度的变化对节点的初始转动刚度、极限转动能力以及抗弯承载力都有不同程度的影响;节点的初始转动刚度随着端板厚度的增加而增加,但节点的极限转动能力却随着端板厚度的增加而减小;设计中建议采用大螺栓、中等厚度的端板,同时螺栓应尽量布置在靠近梁翼缘一侧;传统的T形件方法计算端板强度,其计算结果偏低.
위고찰외신단판련접중불동단판후도、라전직경、라전포치대절점수력성능이급단판강도적영향,채용유한원수치분석연건ANSYS건립반강성단판련접절점모형진행비선성유한원분석.재건립모형화계산분석과정중고필료탄소성、대변형화접촉문제.분석결과표명:단판후도적변화대절점적초시전동강도、겁한전동능력이급항만승재력도유불동정도적영향;절점적초시전동강도수착단판후도적증가이증가,단절점적겁한전동능력각수착단판후도적증가이감소;설계중건의채용대라전、중등후도적단판,동시라전응진량포치재고근량익연일측;전통적T형건방법계산단판강도,기계산결과편저.
The finite element software ANSYS was used to analyze the influences of different end-plate thickness, bolt diameter and layout of bolts on joint performances and end-plate strength in extended end-plate connections.The analytical models took into account material nonlinearities, large displacements and geometrical discontinuities.The analysis has indicated that the change of end-plate thickness affects the initial rotational stiffness, the ultimate rotational capacity and the bearing capacity of connections to varying degrees.Initial rotational stiffness of connections increases with end-plate thickness, but the utmost rotational capacity of connections decrease with end-plate thickness.In order to guarantee the ductility of connections, big bolts and medium end-plate thickness should be adopted and bolts ought to be put as close as possible to the flange of the beam.The T-stub analogy has limitations in representing the strength of end-plate.The results computed by the T-stub analogy are lower than finite results.