【摘要】 高层建筑中,采用开孔梁可以有效降低建筑层高,节约建筑空间。但孔洞破坏了混凝土梁的原有受剪机理,尤其是框架梁端部开孔使梁端塑性铰区域受力变得复杂。通过对5根端部开孔的钢筋混凝土框架梁试件进行反复荷载作用下的试验,研究了在低周反复荷载作用下端部开孔梁的受力性能,分析了不同开孔尺寸和补强方式的开孔梁的破坏特征及抗震滞回性能,从而得出有效的补强配筋形式。更多还原

【Abstract】 In modern high-rise constructions,opening beams are used extensively in reducing buildings’ story height and saving its space.However,the beam’s shear mechanism is changed worse and the mechanism is intricated by opening,especially in the plastic area-the end of the beam beside the column here.By applying cycle loading,laboratory studies on the five beams of RC-frame with circular opening in the end are carried out,and the mechanical behavior of the beams of RC-frame with end circular opening are studied.The better method to enforce the opening beams is presented by analysing the failure properties and anti-seismic hysteretic characteristics of opening beams with different opening size and reinforced methods.更多还原