کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
284615 509154 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical modelling of concrete-filled steel box columns incorporating high strength materials
ترجمه فارسی عنوان
مدل سازی عددی ستون های فولادی پر شده با بتن حاوی مواد با مقاومت بالا
کلمات کلیدی
مدل عنصر محدود بتن با مقاومت بالا، فولاد با مقاومت بالا محدود کردن استرس، ستون های فولادی پر شده با بتن
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• An accurate FE model is developed for high strength CFST columns.
• A new equation is proposed for estimating the confining pressure.
• The obtained predictions are compared well with existing experimental results.
• Both EC4 and AS 5100 can be safely extended to high strength CFST columns.

In this paper, an accurate finite element model which accounts for the effects of initial local imperfections and residual stresses is developed for the nonlinear analysis of high strength steel box columns infilled with high strength concrete. The inelastic behaviour of the steel box and the concrete core is modelled using an elastic–plastic model with linear hardening and a concrete damaged plasticity model, respectively. In addition, an extensive numerical analysis based on a wide range of width-to-thickness ratios, yield stresses of steel tubes and compressive strengths of concrete core was also carried out to propose a new empirical equation for estimating the confining pressure on the concrete. The predictions of ultimate strengths, behaviour and failure modes are compared with experimental results to verify the accuracy of the present model. Parameter studies indicate that both the Eurocode EC4 and Australian Standard AS 5100 approaches can be safely extended to predict the ultimate strength of concrete-filled steel columns with high strength materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Constructional Steel Research - Volume 102, November 2014, Pages 256–265
نویسندگان
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