桁架高度对双向钢筋桁架组合楼板承载性能分析  

Truss height on the two-way reinforced truss composite floor slab bearing performance analysis

作　　者：张丹丹 刘伟[1] 刘燕峰 ZHANG Dan-dan;LIU Wei;LIU Yan-feng(School of Civil Engineering,Jilin Jianzhu University,Changchun 130118,Caina;Affordable housing of Jilin province construction investment Co.,Ltd.Changchun 130012)

机构地区：[1]吉林建筑大学土木工程学院,长春130118 [2]吉林省保障性住房建设投资有限公司,长春130012

出　　处：《吉林建筑大学学报》2022年第5期9-13,27,共6页Journal of Jilin Jianzhu University

摘　　要：为研究分析桁高对钢筋桁架双向组合楼板承载力的影响,本文通过设置5块桁高不同的试件做有限元模拟,得到双向板的破坏机理和荷载-位移曲线;根据普通钢筋混凝土板的弹性理论计算方法,推导出双向板正截面抗弯承载力计算公式;将双向板受力性能理论计算和有限元模拟结果作对比分析,得出在符合双向板使用要求内提高桁架高度,可明显改善其承载力.但随着高度的持续增加,承载能力增加程度减缓,故为保证经济实用且具有较高承载力,推荐所需小跨度楼板的实际工程中使用桁高85 mm的钢筋桁架双向板.In order to study and analyze the effect of truss height on the bearing capacity of the two-way combination floor slab of the reinforced truss,this paper can obtain the failure mechanism and load-displacement curve of the two-way plate by setting up five specimens with different truss heights to do finite element simulation;According to the elastic theory calculation method of ordinary reinforced concrete slabs,the calculation formula of bending bearing capacity of positive section of two-way slabs is derived;Then,compared and analyzed by the theoretical calculation of the force performance of the bi-directional plate and the finite element simulation results,it can be concluded that the truss height can be increased within the requirements of the bi-directional plate,which can significantly improve its bearing capacity.However,with the continuous increase of height,the degree of increase in bearing capacity has slowed down,so in order to ensure economical and practical and have a high bearing capacity,it is recommended to use a truss truss two-way board with a truss height of 85mm in the actual project of the required small span floor slab.

关 键 词：双向板 桁架高度 有限元模拟 承载力 

分 类 号：TU375.2[建筑科学—结构工程]