Influence of Longitudinal Force on Shear Performance
of Segment Circumferential Joints of Quick Connectors

LUO Xu, QIN Nan, YE Yuhang, GAO Xuekui, XU Wentian, LIU Xian

doi:10.3973/j.issn.2096-4498.2023.S2.028

Tunnel Construction >

2023 , Vol. 43 >Issue S2: 246 - 251

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.S2.028

Influence of Longitudinal Force on Shear Performance of Segment Circumferential Joints of Quick Connectors

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(1. Guangzhou Metro Design and Research Institute Co., Ltd., Guangzhou 510010, Guangdong, China; 2. College of Civil Engineering, Tongji University, Shanghai 200092, China; 3. Civil Aviation Airport Planning and Design Research Institute Co., Ltd., Beijing 100029, China)

Online published: 2024-03-28

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Abstract

To explore the shear resistance of the "flat joint + quick connector" type segment circumferential joints, indoor tests are designed on shear resistance of segment circumferential joints under various longitudinal forces. The shear resistance mechanism of such segment circumferential joints are analyzes via test results and loaddislocation curves, obtaining the influence patterns of longitudinal force on the shear resistance of circumferential joints and the shear stiffness and the bearing capacity of the circumferential joints at the same stage. Conclusions are drawan as follows: (1) The quick connectors of the recommended circumferential joints can effectively control the dislocations, which is superior to convational "flat joint + nclined/curved bolt" type segment circumferential joints. (2) The shear resisitance of circumferential joints is far lager in elastic stage than plastic stage, thus it is recommended to control the dislocation within 5.51 mm to guarantee the resistance of circumferential joints.

Key words： segment circumferential joints; shear properties; longitudinal force; quick connectors; shield tunnel

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LUO Xu, QIN Nan, YE Yuhang, GAO Xuekui, XU Wentian, LIU Xian . Influence of Longitudinal Force on Shear Performance of Segment Circumferential Joints of Quick Connectors[J]. Tunnel Construction, 2023 , 43(S2) : 246 -251 . DOI: 10.3973/j.issn.2096-4498.2023.S2.028

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