摘要
承受弯矩作用的钢结构半刚性节点可离散为两端通过刚性体连接的细观单元并联体,而细观单元体则假定为理想弹脆性体,定义单元体失效数目与总数目之比为损伤变量,根据平衡条件和损伤力学理论,导出了半刚性节点单调受弯时的损伤本构关系模型,分析得出的弯矩-转角关系式仅与节点的初始刚度、极限弯矩及相应的转角有关,该式能反映半刚性节点本构关系的非线性特征,而且与已有试验结果吻合良好.
The semi-rigid connection joint in steel frame could be characterized by a meso-damage model which was composed of a set of brittle linear-elastic flexural springs of equal stiffness joined in parallel. And the nonlinear performance of the moment-rotation curve of the joint was analyzed. Based on the equi- librium equation and damage theory, a damage constitutive model of steel frame joint subjected to mono- tonic moment was deduced. The coefficients used in the model could be determined by initial flexural stiffness and ultimate moment. It was found that theoretical curve had a good agreement with experi- ments.
出处
《郑州大学学报（理学版）》
CAS
北大核心
2015年第1期115-118,124,共5页
Journal of Zhengzhou University:Natural Science Edition
基金
河南省科技攻关重点项目
编号132102210500
关键词
钢结构
弯矩-转角关系
损伤
半刚性连接
steel structure
moment-rotation relationship
damage
semi-rigid connection
