【摘要】 焊接翼缘板加强式梁柱刚性连接是塑性铰外移以提高连接塑性变形的一种改进形式。为考察这种连接形式在循环荷载作用下的滞回性能,共进行了4个1/2模型的拟静力加载试验,研究了梁翼缘宽厚比、腹板高厚比对连接性能的影响和节点域强弱对连接塑性转动能力的影响。作为比较,还进行了一个盖板加强式梁柱刚性连接的试验。试验结果表明,这种连接形式性能优良,所有的试件都没有发生脆性破坏,都能确保塑性铰转移到加强板以外,梁端塑性转角介于0.044～0.054rad之间,达到了特殊抗弯钢框架连接塑性转动能力不小于0.03rad的要求。在试验过程中所有的加强板都没有发生局部屈曲。在满足我国抗震规范要求的前提下,增大梁翼缘的宽厚比,梁翼缘更易于发生塑性局部屈曲,但对极限承载能力和变形能力的影响不大;减小梁腹板的高厚比则对承载能力的影响较明显;较弱的节点域,会显著降低连接的承载力,但可提高其变形能力。更多还原

【Abstract】 Welded flange plate(WFP) reinforced steel moment resistant frame(MRF) connections is one of improved forms to move plastic hinge outward from the beam and column interface.In order to investigate its hysteretic behavior,four half-scale specimens were tested in this study.In the test,the effective of width-to-thickness ratios of beam flange and web on the performance of connections and the attribution of strength of panel zone to their plastic rotation were studied.In addition,one cover plate(CP) reinforced specimen was tested to compare their cyclic behaviors.Test results revealed that all the specimens had good cyclic performance without brittle failure,and the plastic hinge was formed outside the reinforced zone.The plastic rotation angles ranged from 0.044rad to 0.054rad,exceeding the required 0.03rad for special moment resistant frame(SMRF).During the test,no local buckling occurred in the reinforced plates.When the design satisfied the demand of present seismic code,the influence of width-to-thickness ratio of beam flange on bearing and plastic deformation capacity of connection was less,though beam flange was more susceptible to occurring local buckling with the increase of the ratio,but with the increase of the height-tothickness ratio of beam web,the influence on bearing capacity was larger;for weaker panel zone,the bearing capacity decreased obviously,but the deformation capacity increased remarkably.更多还原