摘要
螺栓顶-底角钢节点是一种有效的半刚性节点形式,为了研究其抗震性能,提出螺栓角钢的双线性恢复力模型,并采用有限元软件OpenSees进行数值分析。有限元分析以2个既有试验为模型,采用基于纤维模型的非线性梁柱单元模拟钢梁与钢柱,在梁柱结合部位采用零长度连接单元模拟连接角钢的作用,采用自适应非线性求解法进行数值分析。结果表明:数值分析较好地模拟了节点的弹塑性性能,基于OpenSees的分析模型适用于该节点的非线性分析;推导出的螺栓角钢双线性恢复力模型能够较好地模拟节点的作用,具有适用性。
Bolted-angle connection is an effective kind of joint,in order to study the seismic behavior,bilinear restoring force model of bolted-angle is derived and finite element software OpenSees is used to carried out numerical simulation.Non-linear beam-column element based on fiber model is used to simulate beam and column,zero-length element is used to simulate the action of bolted-angle,adaptive nonlinear solution is used.Results show elastoplastic performances of the joint can be well simulated by numerical analysis,analysis model based on OpenSees can be applied to non-linear analysis.The bilinear hysteresis model derived can better simulate the role of the joint and of applicability.
出处
《钢结构》
2011年第1期11-15,共5页
Steel Construction
基金
江苏省建设厅科技基金资助项目(JS2007ZB04)
