箍筋对膨石轻板受力性能影响的试验研究  

Experimental Study of the Influence of Stirrup on the Behavior of Modified Perlite Concrete Slab

作　　者：李永梅[1,2] 李运运[1] 王文明 陈智勇 赵均[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [2]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124 [3]北京天基新材料股份有限公司,北京100161

出　　处：《北京工业大学学报》2016年第9期1363-1371,共9页Journal of Beijing University of Technology

基　　金：北京市自然科学基金资助项目(8152008)

摘　　要：为了解决膨石材料强度低,导致膨石轻板自身抗剪强度不足、易发生剪切破坏的问题,提出在膨石轻板中配置箍筋的方式来加以改善的措施.通过对4块配置箍筋的膨石轻板试件和2块未配置箍筋试件进行静力加载对比试验,考察各试件的破坏过程和最终破坏形式,研究箍筋对膨石轻板受力性能的影响.试验结果表明:配置箍筋的膨石轻板具有更好的安全性、适用性和延性;箍筋不仅有效改善了膨石轻板试件破坏形式,避免了板斜截面剪切破坏的发生,而且提高了板的特征荷载、刚度和变形能力.Aiming at the low strength of the modified perlite concrete material,which causes shear strength of the modified perlite concrete light slab to be insufficient,and the shear failure to occur easily,a method to improving shear strength of the slab was presented based on the arrangement of stirrup in the slabs. In order to study the influence of stirrup on the behavior of modified perlite concrete,comparative static experiments of four specimens with different stirrup ratio and two specimens without stirrup were made. The failure process and final failure form were investigated,and the influenceor action of stirrup were analyzed for all of specimenson the characteristic load, ductility factor, rigidity, longitudinal reinforcement strain and so on. The experimental result indicates that the reasonable arrangement of stirrup is able to enhance shear capacity effectively,and improve the failure form,the ultimate bearing capacity and characteristic load for the modified perlite concrete light slab,which owns better safety,serviceability and ductility. This provides reference for the engineering application of modified perlite concrete slab.

关 键 词：膨石轻板 抗剪强度 箍筋 特征荷载 破坏形式 

分 类 号：TU528.2[建筑科学—建筑技术科学]