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

FU Weiqing; LI Mao; WANG Xin; HUANG Jian; WANG Jian

doi:10.13204/j.gyjzG22072104

Volume 53 Issue 11

Nov. 2023

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FU Weiqing, LI Mao, WANG Xin, HUANG Jian, WANG Jian. Study on Mechanical Performances of Connections in Prefabricated Municipal Cable Duct Banks[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(11): 73-79. doi: 10.13204/j.gyjzG22072104

Citation:

FU Weiqing, LI Mao, WANG Xin, HUANG Jian, WANG Jian. Study on Mechanical Performances of Connections in Prefabricated Municipal Cable Duct Banks[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(11): 73-79. doi: 10.13204/j.gyjzG22072104

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

doi: 10.13204/j.gyjzG22072104

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

Received Date: 2022-07-21

Abstract

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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References(23)

References

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