地铁地下车站大跨度预制带肋混凝土叠合板受弯性能研究
颜慧1徐前卫1路林海2武朝军2韩宇峰1龚杰3
Study on Flexural Behavior of Large-Span Precast Ribbed Concrete Composite Slabs for Underground Subway Stations
YAN Hui1XU Qianwei1LU Linhai2WU Chaojun2HAN Yufeng1GONG Jie3
-
作者信息:1.同济大学道路与交通工程教育部重点实验室，201804， 上海
2.济南轨道交通集团有限公司， 250013， 济南
3.中交路桥北方工程有限公司， 102600， 北京
-
Affiliation:1.The Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, 201804, Shanghai, China
2.Jinan Railway Transportation Group Co., Ltd., 250013, Jinan, China
3.CCCC Road & Bridge Northern Engineering Co., Ltd., 102600, Beijing， China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2025.04.032
-
中图分类号/CLCN:U231.4
-
栏目/Col:研究报告
摘要:
［目的］地铁地下车站大跨度预制带肋混凝土叠合板存在板厚、跨度大、自重大的问题，且目前相关研究较少，对此有必要对其力学性能及其影响因素进行研究。［方法］针对济南地铁8号线某装配式地铁车站叠合顶板，采用试验和数值模拟相结合的方式进行研究。设计了2块叠合板试件和1块整浇板试件进行静力加载试验，对试件的裂缝分布和发展、荷载-跨中挠度曲线等进行了分析。对试验工况进行了数值模拟，在验证有限元模型可行性的前提下对影响叠合板受力性能的关键因素进行了扩展分析。［结果及结论］3块试件在加载过程中的受力状态类似，叠合板试件在加载过程中未出现沿着叠合面滑移的情况，板侧裂缝贯通发展，叠合面黏结性能和试件整体工作性能良好；底板肋板上部钢筋承担了部分受拉钢筋的作用，提高了叠合板的承载能力；设置桁架钢筋对于叠合板的承载力提升效果有限，可根据实际情况降低桁架钢筋的密度或取消桁架钢筋的设置；通过采用空心底板可有效减少叠合板自重且对其受力性能影响不大。
Abstracts:
［Objective］ The large-span precast ribbed concrete composite slabs for underground subway stations have problems of thick slabs, large spans, and heavy self-weight. And there are few related researches at present, necessitating studies on the mechanical properties of the slabs and factors that affect them. ［Method］ The composite roof slab of a prefabricated subway station on Jinan Metro Line 8 is studied with combination of experiments and numerical simulations. Two composite slab specimens and one cast-in-place slab specimen are designed for static loading tests, and the crack distribution and development of the specimens, as well as the load-midspan deflection curves are analyzed. Numerical simulation of the test conditions is carried out. An extended analysis of key factors affecting the mechanical properties of the composite slabs is carried out on the premise of verifying the feasibility of the finite element model. ［Result & Conclusion］ The stress state of three specimens in the loading process are similar. During the loading process, the composite slab specimens do not slip along the composite surface, penetrating development of the cracks on the slab side occurs, the bond performance of the composite surface and the overall specimen working performance are good; the upper reinforcement of the bottom slab rib assumes part of the tensile reinforcement role, which improves the load carrying capacity of the composite slab. Because the setting of truss reinforcement has limited effect on the load carrying capacity improvement of the composite slab, the density of truss reinforcement can be reduced or the setting of truss reinforcement can be canceled according to actual conditions; the use of a hollow bottom slab can effectively reduce the self-weight of the composite slab without having much effect on its stress performance.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 基于振动传递率的地铁车辆振动传递特性研究
过刊浏览
资料下载
友情链接