CAJ | 학술논문

为研究砂浆强度、开洞率和高宽比3个因素对砌体承重墙刚度退化的影响,以3层砌体房屋的底层承重墙为原型,设计4片1:2的缩尺试件进行伪静力试验. 试验结果表明:在加载初期,各因素影响类似,刚度退化均较快;试件开裂后,刚度退化均放缓,各试件在开裂、极限和破坏等特征点的刚度退化系数在76%、20%和16% 左右.砂浆强度愈低,砂浆粘结性能较差,试件初始刚度愈小,开裂后刚度退化稍缓,试件塑性变形小. 开洞率愈大,初始刚度愈小,开裂后刚度退化加剧,试件塑性变形最小. 高宽比愈大,初始刚度愈小,开裂后刚度退化幅度最小. 研究成果可为深入探讨各因素对砌体墙刚度退化的研究提供参考.
위연구사장강도、개동솔화고관비3개인소대체체승중장강도퇴화적영향,이3층체체방옥적저층승중장위원형,설계4편1:2적축척시건진행위정력시험. 시험결과표명:재가재초기,각인소영향유사,강도퇴화균교쾌;시건개렬후,강도퇴화균방완,각시건재개렬、겁한화파배등특정점적강도퇴화계수재76%、20%화16% 좌우.사장강도유저,사장점결성능교차,시건초시강도유소,개렬후강도퇴화초완,시건소성변형소. 개동솔유대,초시강도유소,개렬후강도퇴화가극,시건소성변형최소. 고관비유대,초시강도유소,개렬후강도퇴화폭도최소. 연구성과가위심입탐토각인소대체체장강도퇴화적연구제공삼고.
To study the effect of three aspects such asmortar strength , of opening rate and ratio of height and width on thestiffness degradationof masonry bearing walls ,the paper took the bottom walls of a 3-sto-ry masonry structure as prototype ,and designed four scaled wall specimens to carry out pseudo static test . The results show that the stiffness degenerates quicklyat the preliminary stage of loading .The influence of every factor is similar .The stiffness degradation slows downafter cracking of test-piece .Thecoefficient stiff-ness degradation at some feature points such as crack load , ultimate load and failure load is respectively about 76%, 20%and 16%.The lower the mortar strength ,the poorer the viscidity of mortar .Thelessthe initial stiffness , the slower the stiffness degradates after cracking , theplastic deformationof test-piece is small.The lager ratio of openings, the smaller initial stiffness.thestiffness degradation intensify after cracking .The plastic deformation is the minimum .The larger the ratio of height and width , the less the initial stiffness ,the stiffness degradation is the minimum .Theresult can provide reference for further re-search of effect of every factor on stiffness degeneration of masonry wall .