基于流形元的排水箱涵承载特性研究

doi:10.19952/j.cnki.2096-5052.2021.03.06

Hazard Control in Tunnelling and Underground Engineering

2021, Vol. 3

Issue (3): 50-58 DOI: 10.19952/j.cnki.2096-5052.2021.03.06

Research Article

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Bearing characteristics of corroded drain tank culvert based on manifold method

WU Jie¹, HU Xiang¹, LI Tao^2*

1. School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China;
2. Hubei Provincial Communications Planning and Design Institute Co., Ltd., Wuhan 430050, Hubei, China

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Abstract Based on the corrosion-damaged sewage trunk line in the southern area of Shanghai as the background, cracks in the sewage trunk line were simulated by NMM together with a newly developed SIF extraction method. The crack initiation, crack propagation process and load-bearing characteristics were simulated by fracture mechanics.The calculated displacement and stress results were in good agreement with theoretical experience and physical test results. The influence of the crack initiation length on the load-deflection curve was analyzed. Considering the random factors in the physical test, the load-deflection curve obtained by the numerical analysis agreed well with the physical test curve. After the crack occurs, the discontinuity of the displacement field on both sides of the crack was obvious. After the crack across the top steel bar, the restraint effect of the steel bar on the discontinuous displacement field and the further crack propagation was demonstrated. The analysis results showed that the manifold element had good applicability to the simulation of reinforced concrete.

Key words： corrosion-damaged sewage trunk numerical manifold method stress intensity factor fracture analysis

Received: 23 June 2021 Published: 20 September 2021

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WU Jie,HU Xiang,LI Tao. Bearing characteristics of corroded drain tank culvert based on manifold method[J]. Hazard Control in Tunnelling and Underground Engineering, 2021, 3(3): 50-58.

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http://tunnel.sdujournals.com/EN/10.19952/j.cnki.2096-5052.2021.03.06 OR http://tunnel.sdujournals.com/EN/Y2021/V3/I3/50

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