کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
763389 1462973 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation on the cracking behavior of concrete cover induced by corner located rebar corrosion
ترجمه فارسی عنوان
بررسی رفتار ترک خوردگی پوشش بتونی که توسط خوردگی خورنده میلگرد به کار رفته است
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی


• An improved corrosion distribution pattern was proposed.
• Cover cracking was modeled at meso-scale using finite-element method.
• The effect of non-uniform corrosion on cover cracking was explored.

Non-uniform corrosion of reinforcement causes concrete cracking in chloride contaminated RC structures. Due to the special boundary conditions, the concrete cover with corner located rebar is often subjected to the attack of chloride ions in a marine environment from two directions, and thus the corresponding non-uniform corrosion distribution should be different from the one for side-located rebar. The aim of the work is to explore the effect of corner located rebar corrosion on the cracking of cover concrete. For corner located rebar, an improved non-uniform corrosion distribution model was established based on the analysis results of two-dimensional chloride diffusion in concrete. Considering the heterogeneities of concrete, a meso-scale mechanical model and method for the study on the failure behavior of concrete cover was built. In the analysis model and method, the non-uniform radial displacement distribution was adopted to simulate the corrosion expansion behavior of the rebar. The cracking of concrete cover with corner located rebar was simulated and studied. The present approach was verified by the available experimental observations. The influences of concrete heterogeneity, corrosion distribution types, rebar diameter and concrete cover thickness on the failure patterns of concrete cover and the expansive pressure were investigated. The simulation results indicate that the developed approach can well describe the cracking behavior of cover concrete and the corrosion-expansion behavior of steel rebar.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Failure Analysis - Volume 52, June 2015, Pages 129–143
نویسندگان
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