带窗洞自保温暗骨架承重墙抗震试验及承载力计算

Seismic tests and bearing capacity calculation of self-insulating structural wall with inner skeleton with windows

为了研究带窗洞自保温暗骨架承重墙的抗震性能及承载力计算与分配方法,设计制作足尺试件并进行低周往复荷载试验,以试验为基础分别基于等效弹性板模型、刚架斜压杆模型,建立带窗洞自保温暗骨架承重墙的开裂荷载、极限荷载计算方法,并将计算值与实测值进行比较。研究结果表明:带窗洞自保温暗骨架承重墙试样的失效可分为共同工作、转化过渡和弱框架工作3个阶段,且均为延性破坏,2个试样的延性系数分别为3.034和4.085;窗下墙先于窗间墙破坏,窗下墙为带窗洞自保温暗骨架承重墙的第一道抗震防线,窗间墙在承担抗震极限承载力方面起主导作用;窗洞宽度显著影响墙体的耗能、刚度及承载等性能。所建立的求解方法精度较高,建议在抗震设计与分析时考虑窗下墙的影响效应。

In order to study the seismic performance of the self-insulating structural wall with inner skeleton(SSWIS)with windows as well as its calculation and distribution method of bearing capacity,full-scale specimens were designed and low cycle reciprocating load tests were carried out.Based on the equivalent elastic plate model and the baroclinic bar model of rigid frame respectively,the calculation methods of cracking load and ultimate load of the SSWIS with windows were revised and established,and the calculated values were compared with the measured values.The results show that the failure of the SSWIS with windows can be divided into three stages:cowork,transformation transition and weak frame work,all of which are ductile destruction with corresponding ductility coefficients of 3.034 and 4.085,respectively.The spandrel wall is destroyed before the wall between the windows,the spandrel wall is the first anti-seismic defense line of the SSWIS with windows,and the wall between the windows plays a leading role in bearing the anti-seismic ultimate bearing capacity,and interfenestration significantly affects the energy dissipation,stiffness and load-bearing performance of the wall.The established calculation methods are more accurate.It is suggested that seismic design and analysis should take the effect of the spandrel wall into account.