焊钉锈蚀对混凝土板锈胀开裂行为的数值模拟及相关影响参数分析

doi:10.11896/cldb.23120055

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Abstract To investigate the cracking behavior of concrete resulting from rust expansion of anchor bolt components in a corrosive environment within reinforced concrete composite beams, a local rust expansion model of anchor bolts was established using the cohesive force model theory and global insertion of cohesive elements. Analyzed anchor bolt parameters such as position, diameter, spacing, and then examined their impacts on the distribution of rust expansion forces, characteristics of resulting cracks, and the overall cracking process in concrete. The findings indicated that an increased anchor bolt diameter should lead to a reduction in rust expansion force at the initial cracking stage. Specifically, augmenting the anchor bolt diameter from 16 mm to 25 mm resulted in an 82% decrease of the rust expansion force at the onset of initial cracking. When the longitudinal and transverse spacing ratio of anchor bolts is greater than 2, multiple diagonal cracks emerged in the horizontal direction of the edge. The finite element model with global insertion of cohesive elements effectively simulates the rust expansion and cracking process.

Key words： Steel-concrete composite beam stud corrosion rust expansion force concrete crack numerical analysis

Published: 25 December 2024 Online: 2024-12-20

CLC number:

U444

Fund:Scientific Research Project of Gansu Provincial Department of Transportation (2022-26), Gansu Provincial Key Research and Development Plan-Industrial Project (23YFGA0042), Central Government Guide Local Science and Technology Development Fund Project (22ZY1QA005).

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	LIN Pengzhen
	YU Bo
	HE Zhigang

Cite this article:

LIN Pengzhen,YU Bo,HE Zhigang. Numerical Simulation of Welding Nail Corrosion on Rust Expansion and Cracking Behavior of Concrete Slab and Analysis of Related Influencing Parameters[J]. Materials Reports, 2024, 38(24): 23120055-8.

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http://www.mater-rep.com/EN/10.11896/cldb.23120055 OR http://www.mater-rep.com/EN/Y2024/V38/I24/23120055

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