Performance assessment of partially corrosion-damaged RC segment incorporating the spatial variability of steel corrosion

被引：11

作者：

He, Zhengshu ^{[1
]}

He, Chuan ^{[1
]}

Ma, Gaoyu ^{[1
]}

Yang, Wenbo ^{[1
]}

Kang, Xiaoyue ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, MOE Key Lab Transportat Tunnel Engn, Chengdu 610031, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 371卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

RC shield tunnel; Steel corrosion; Spatial variability; Eccentric loading; Ultimate bearing capacity; PITTING CORROSION; STRUCTURAL PERFORMANCE; RELIABILITY; REINFORCEMENT; TUNNEL; MAINTENANCE; BEHAVIOR; CRACKING; PATTERN; BEAMS;

D O I：

10.1016/j.conbuildmat.2023.130789

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Steel corrosion is a dominant source of structural performance deterioration for reinforced concrete (RC) shield tunnels, which is always spatially nonuniform and discretely distributed in RC segmental linings. To accurately estimate the deteriorated performance of RC segmental linings under coupling actions of flexural and axial loads, the research on the mechanical behavior of RC segments has to be integrated with the effects of nonuniform steel corrosion and loading eccentricity. In this paper, the failure modes of corroded RC segmental specimens and their damaging evolution under ultimate loading were experimentally investigated, and the effects of spatial vari-ability of steel corrosion and level of sustained load were discussed. A probabilistic model for simulating the spatial variability of steel corrosion within a partial length of longitudinal reinforcement was proposed. Finally, Monte Carlo simulation (MCS) incorporated with finite element (FE) analysis was performed to investigate the strength loss of corroded RC segmental specimens, emphasizing on the effects of spatial distribution of steel cross-section area loss, degree of steel corrosion and eccentricity of loading.

引用

页数：17

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