摘要
目的研究针对于保温层厚度大于200 mm的预制超低能耗夹芯墙板的金属限位拉结件的抗拉性能,为该类墙板限位拉结件的研究提供设计依据。方法针对不同直径的金属限位拉结件进行抗拉试验。同时利用有限元软件建立对应的拉结件模型,通过模拟结果与试验结果的对比,分析拉结件的抗拉承载力、安全系数、变形性能。结果直径为5 mm的拉结件抗拉承载力为24.4 kN,直径为6.5 mm的拉结件抗拉承载力为29.3 kN,安全系数为5.88~8,满足安全系数最小值为4的要求。其设计承载力下的位移最大值为2.35 mm,小于墙缝密封胶剪切变性限值。结论该拉结件的抗拉性能可满足我国规范要求,在正常使用情况下不会发生影响接缝性能的变形。
The study is aimed at the tensile properties of the metal limit connectors of the prefabricated ultra-low energy consumption sandwich wallboard whose insulation layer thickness is more than 200 mm,which provides the design basis for the study of this kind of wallboard limit connectors.Tensile tests are carried out for metal limit connectors with different diameters.At the same time,the finite element software is used to establish the corresponding model of the pulling connectors.By comparing the simulation results with the test results,the tensile bearing capacity,safety factor and deformation performance of the pulling connectors are analyzed.The tensile bearing capacity of the workpiece with a diameter of 5 mm and 6.5 mm is 24.4 kN,and the tensile bearing capacity of the workpiece with a diameter of 6.5 mm is 29.3 kN.The safety factor is 5.88-8,which meets the requirement of the minimum safety factor of 4.The maximum displacement under the design bearing capacity is 2.35 mm,which is less than the limit of shear densification of the wall joint sealant.The tensile properties of the connectors can meet the requirements of Chinese codes,and the deformation that affects the joint performance will not occur under normal use.
作者
吕安安
赵志刚
董铁良
常世涛
Lü An′an;ZHAO Zhigang;DONG Tieliang;CHANG Shitao(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Yantong Precast Concrete Co.Ltd.,Beijing,China,102202)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第1期61-68,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
“十三五”国家重点研发计划项目(2017YFC0703703)。
关键词
预制混凝土夹芯保温墙
力学性能
拉结件
安全系数
precast concrete sandwich wall
mechanical properties
connectors
safety factor
