摘要
制作受拉纵筋配筋率分别为0.42%、0.66%、0.95%的石膏单向板试件S1、S2、S3,通过静力加载试验,研究了其面外荷载作用下的受力性能和破坏形态。试验结果表明:试件S1和S2纵筋均首先屈服,之后弯剪斜裂缝逐渐发展成为临界裂缝,2个试件最终的主要破坏模式分别为剪压破坏和斜拉破坏;配筋率最大的试件S3纵筋屈服较晚,最终破坏模式为斜拉破坏;试件S1和S2破坏时挠度变形较大,延性较好,而试件S3极限变形较小;3个试件受力过程均与适当配筋的钢筋混凝土构件类似,分为未裂阶段、带裂缝工作阶段和破坏阶段3个受力阶段;随着配筋率的增大,试件的开裂荷载、屈服荷载和峰值荷载均有所提高。
In this study,three reinforced gypsum one-way slab specimens with 0.42%,0.66%and 0.95%of tensile longitudinal reinforcement respectively were designed and fabricated,and their mechanical properties and damage patterns under out-of-plane loading were investigated by static loading tests.Test results indicated that the longitudinal reinforcement of specimens S1 and S2 yielded first,and then the flexural-shear diagonal cracks gradually developed into critical cracks,and the final damage modes of the two specimens were shear compression damage and diagonal tensile damage,respectively;the longitudinal reinforcement of specimen S3 with the largest reinforcement ratio yielded at the late loading stage and the main damage mode was diagonal tensile damage;S1 and S2 had larger deflection deformation and better ductility,while the ultimate deformation of specimen S3 was smaller;the damage process of all three specimens could be divided into three stages:the uncracked stage,the working stage with cracks and the damage stage,similar to that of properly reinforced concrete members;with the increase of reinforcement ratio,the cracking load,yielding load and peak load of the specimens increased.
作者
种迅
叶传胜
蒋庆
章卫东
朱旺成
CHONG Xun;YE Chuansheng;JIANG Qing;ZHANG Weidong;ZHU Wangcheng(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering Structures and Materials,Hefei 230009,China;Anhui Research Institute of Building Science and Design,Hefei 230088,China;Anhui Construction Industry Company Limited,Hefei 231600,China)
出处
《新型建筑材料》
2023年第5期85-89,共5页
New Building Materials
基金
安徽省重点研究与开发计划资助项目(202104a07020022)。
关键词
配筋石膏
单向板
力学性能
静力加载试验
reinforced gypsum
one-way slab
mechanical properties
static loading test
