预制排管缆线管廊接头受力性能研究

付伟庆; 李茂; 王鑫; 黄剑; 王建

doi:10.13204/j.gyjzG22072104

预制排管缆线管廊接头受力性能研究

doi: 10.13204/j.gyjzG22072104

付伟庆^1,2,
李茂¹,
王鑫¹,
黄剑³,
王建³

1. 青岛理工大学土木工程学院, 山东青岛 266033;
2. 蓝色经济区工程建设与安全协同创新中心, 山东青岛 266033;
3. 上海市政工程设计研究总院(集团)有限公司, 上海 200092

基金项目:

国家重点研发计划项目(2017YFC0805000)；国家自然科学基金项目(52178488)；上海市青年科技启明星计划(20QB1404900)。

详细信息

作者简介:
付伟庆,男,1976年出生,博士,教授。电子信箱:fuweiqing@qut.edu.cn

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出版历程
- 收稿日期: 2022-07-21

Study on Mechanical Performances of Connections in Prefabricated Municipal Cable Duct Banks

1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China;
2. Co-Operative Innovation Center of Engineering Construction and Safety in Shandong Peninsula Blue Economic Zone, Qingdao 266033, China;
3. Shanghai Municipal Engineering Design Institute(Group) Co., Ltd., Shanghai 200092, China

摘要

摘要: 排管式缆线管廊具有断面小、埋深浅和铺设条件复杂等特点。该类型缆线管廊主要采用工厂预制,现场施加预应力装配连接,其接头刚度对管廊正常使用有较大影响。为探究预应力对管廊接头性能的影响,以截面尺寸为1 090 mm×650 mm十管道缆线管廊为例,采用有限元和试验研究方法,对不同预应力钢绞线张拉方式和预应力值下管廊接头抗弯、抗剪性能进行研究。结果表明:预应力钢绞线长度对接头抗弯刚度影响显著,钢绞线越短,接头抗弯刚度越大,延性越低;提高预应力和接头截面摩擦系数,对提高接头抗剪刚度作用明显。最后,通过三组足尺缆线管廊抗弯剪试验,验证了有限元建模分析的正确性。
- 综合管廊 /
- 缆线管廊 /
- 预制装配结构 /
- 预应力 /
- 接头性能 /
- 足尺试验
Abstract: The municipal cable duct banks characterized by a small cross-section, shallow burial depth and intricately laid conditions,which is mainly prefabricated in factory and connected by prestressed assembly on site. The stiffness of municipal cable duct banks have a great impact on their operation. To study the effect of prestress on connecting performances of municipal cable duct banks, taking a 10-pipe municipal cable duct bank with a cross section of 1 090 mm×650 mm as an example, the flexural and shear performances of prefabricated prestressed municipal cable duct banks were studied under different tensioning methods and prestresses with prestressed steel strands by the finite element method and experiments. The results of finite element analysis indicated that the lengths of prestressed steel strands had significant effect on the flexural stiffness of connections, the shorter the steel strands were, the greater the flexural stiffness of connections and the lower the ductility were; increasing the prestress and the friction coefficients of connection sections could improve the shear stiffness of connections significantly. Finally, the correctness of the finite element analysis results was verified by comparing test results of 3 full scale municipal cable duct banks.
- utility tunnel /
- municipal cable duct bank /
- prefabricated structure /
- prestress /
- connection performance /
- full scale test

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