H型钢梁-H型钢柱偏心节点局部屈服荷载承载力的力学行为研究

Mechanical behavior research on local yield strength of eccentric H-beam to H-column joints

针对槽形钢折板补强H型钢梁-H型钢柱的偏心节点,研究了节点局部屈服荷载承载力的力学行为。通过建立5种可能形成的塑性屈服破坏模型,利用屈服线理论,推导出H型钢梁-H型钢柱偏心节点的局部屈服荷载承载力计算公式。取包含梁受拉翼缘在内的节点构件(1/4模型)作为试件,进行了6组拉伸加载试验,验证偏心节点的弹塑性响应。通过对应变分布和翼缘平面外残余变形响应的分析来验证塑性屈服破坏模型的准确性。

For eccentric H-beam to H-column joints strengthened by C-shaped steel plate,the local yield strength was researched.By applying the yield line theory,five different types of plastic yield failure model were build to deduce local yield strength formulas of H-beam to H-column joints.Six loading tests were performed for the local joint models,which include tensile flange（1/4 model） to examine the elastic-plastic behavior of the joints with eccentricity.The measured strain distributions and the residual flange deformations confirm the validity of the collapse mechanism.