梁柱连接组合节点弯矩-转角关系研究

Moment-Rotation Relation Research on Beam-to-Column Composite Joints

梁柱连接组合节点传递着梁柱之间的弯矩和剪力,是钢框架中的重要组成部分,也是钢框架设计中的关键部位之一。弯矩-转角关系是梁柱连接组合节点的主要力学性能,它反映着节点的初始刚度、抗弯承载力和转动能力,直接影响着钢框架体系的变形、极限承载力与整体性能。梁柱连接组合节点连接方式多样、构造形式种类繁多、几何参数多变、各组件受力状态与性能复杂等特性决定了弯矩-转角曲线是非线性的。而弯矩-转角曲线的非线性造成其难以拟合和预测。目前,半刚性连接组合节点的试验与理论研究有了较大的进展。本文归纳和总结了国内外梁柱半刚性连接组合节点弯矩-转角关系研究,包括试验研究和理论模型,并指出了今后需要进一步研究的重点与方向。

The beam-to column composite joints transfer moment of flexure and shearing force between beam and column. It is an important part and one of the key components in steel framing design. The moment-roation relation is the main n, echanical property of beam-to column composite joints. It reflects initial stiffness, flexural capacity and rotation capacity and directly affect distortion, ultimate bearing capacity and whole performance. The nonlinear momentrotation relationship is expected because of the variety of connection mode, structural form, geometrical parameter and component capability on the beam to-column composite joints and it is difficult to be fit and predicted. At present, the experimental and investigation theoretic study of semi-rigid composite joints have got great development. In this paper, the present research situation of moment roation relation on beam to-column semi-rigid composite joints is introduced, including experimental investigation, and theoretic models. The trend for future research on beam to column semi rigid composite joints is proposed.