不同节点轻钢框架的受力性能试验研究

通过对4种不同形式和构造的轻钢框架梁柱连接节点试验研究,分析了端板厚度、T型钢厚度、柱腹板加劲肋等因素对半刚性节点承载力、转动刚度和极限转动能力的影响.研究表明,轻钢框架半刚性连接是承载力较高、延性性能非常好的连接形式.柱腹板设加劲肋的端板连接是轻钢框架较好的半刚性节点.T型钢翼缘厚度对节点承载力的提高作用不明显,但腹板抗剪能力对此有影响.对于具有半刚性连接节点的轻钢框架,应该进行非线性分析.半刚性连接节点组合构件在荷载作用下的滑移现象不能忽视,分析和设计中应引起足够重视,并应提出可靠构造措施.

Experimental Study on Light-Weight Steel Frames with Different Semirigid Joints

The experiments of light-weight steel frames with four types of different semirigid joints were carried out. The characteristics and influencing factor on the bearing capacity,rotational stiffness and ultimate rotatability of steel frames with different semirigid joints are discussed,based on the experimental result. Analyzes the influences of end-plate/T-beam thickness and web ribbings of column on bearing capacity,rotational stiffness and ultimate rotatability of semirigid joints. The results show that the light-weight steel frames in form of semirigid connection with ribs are of high bearing capacity and ductility,and the end-plate connection with web ribbings provided for columns makes the semirigid joints better for light-weight steel frames. The thickness of a flange of a T beam has a few contributions at the bearing capacity of connection,but the web does have remarkable contribution. The slippage between components of joints plays an important part at its mechanical behavior,and more attention should be paid in design.