钢筋桁架预制底板短期刚度的理论分析和试验研究

王炳伦; 张耀庭; 陶金友; 金星; 杨杰

doi:10.13204/j.gyjzG21012704

钢筋桁架预制底板短期刚度的理论分析和试验研究

doi: 10.13204/j.gyjzG21012704

1. 华中科技大学土木与水利工程学院, 武汉 430074;
2. 湖北宝业建筑工业化有限公司, 武汉 403070

基金项目:

湖北省地标项目(023241596)。

详细信息

作者简介:
王炳伦,男,1995年出生,硕士研究生。

通讯作者:
张耀庭,男,1965年出生,博士,教授,博士生导师,zyt1965@mail.hust.edu.cn。

计量
- 文章访问数: 144
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- 被引次数: 0
出版历程
- 收稿日期: 2021-01-27
- 网络出版日期: 2022-03-29

EXPERIMENTAL RESEARCH AND THEORETICAL ANALYSIS OF SHORT-TERM STIFFNESS OF FILIGREE SLABS

1. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Hubei Baoye Building Industrialization Enterprise, Wuhan 403070, China

摘要

摘要: 钢筋桁架混凝土叠合板中预制底板短期刚度的合理取值,直接关系到钢筋桁架混凝土预制底板在短暂设计工况下的验算结果的可靠性。依据JGJ 1—2014《装配式混凝土结构技术规程》设计了3块足尺钢筋桁架混凝土预制底板,尺寸均为3 300 mm×2 200 mm,板厚分别为50 mm(2块),60 mm(1块),并对其进行了静载试验及理论分析。试验及分析结果表明:出露的钢筋桁架参与预制底板的受力,但其作用是有限的,原因是钢筋桁架上部出露部分与板内受力钢筋的受力有差别,导致按等弹性模量法计算的钢筋桁架预制底板刚度值偏大;依据试验结果的分析与对比,反算出采用等弹性模量法计算预制底板总刚度时,应对钢筋桁架部分的换算截面刚度予以折减,即对其计算值乘以系数0.6。
- 钢筋桁架 /
- 短期刚度 /
- 叠合板 /
- 挠度 /
- 抗弯性能
Abstract: In the calculation of short-term stiffness of filigree slabs in composite slabs with lattice girders, the reasonable consideration of the contribution of lattice girder's stiffness to filigree slabs is directly related to the checking computations in the short-term design conditions. Three full-scale filigree slabs were designed according to Technical Specification for Precast Concsete Structceres(JGJ 1—2014), including two filigree slabs in thickness of 50 mm and one filigree slab in thickness of 60 mm, with length and width dimensions of 3 300 mm and 2 200 mm. The test and the analysis results showed that the bare top bars participated in bearing construction loads, but their role was limited. The reason was that the mechanical properties of the bare part of lattice girders were different from the part of bars embedded in slabs, which led to the larger stiffness of filigree slabs calculated by the method of equal modulus of elasticity. Based on the analysis and comparison of the test results, when the equal elastic modulus was used to calculate the total stiffness of filigree slabs, the section stiffness of the lattice girders by inverse calculations should be reduced. Then, a reduction factor of 0.6 was proposed.
- lattice girder /
- short-term stiffness /
- composite slab /
- deflection /
- flexural property

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