کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4923275 1430694 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal creep mechanical-based modeling for flush endplate connections in fire
ترجمه فارسی عنوان
مدل سازی مبتنی بر مکانیکی خزش حرارتی برای اتصال اتصالات پایدار در آتش
کلمات کلیدی
پایان لامپ خزش حرارتی، آتش، مدل مکانیکی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


- Steady-state temperature FE analyses are evaluated against experimental data at elevated temperatures.
- Steady state creep FE analyses predicted the thermal creep response of flush endplates at fire temperature.
- A mechanical-based model is developed to predict the creep behavior of flush endplates connection in fire.
- A set of data is provide to account for the creep thermal stresses and deformations in designing flush endlplates in fire.

A mechanical-based model is developed to predict the time-dependent effect (thermal creep) and the fast loading-rate behavior of flush endplate connections at elevated temperatures during a fire. The fast loading-rate behavior model consists of multi-linear springs that predict each component stiffness, strength, and rotation. The multi-linear springs temperature expressions are based on the ambient temperature formulations proposed in Eurocode3 Part 1.8 where material properties are considered temperature-dependent. To include the effect of thermal creep in the proposed model, a modified Burgers creep model is developed to predict the time-dependent connection rotation and temperature of flush endplate connections. The modified Burgers creep model consists of linear springs and viscous dashpots that predict the time-dependent connection rotation. The proposed model is validated against experimental results available in the literature and finite element (FE) simulations developed as a part of this study. Through explicit consideration of thermal creep effect, the proposed model helps providing important insights into fire-induced thermal stresses and deformations and their implications on designing of flush endplate connections in fire.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Constructional Steel Research - Volume 136, September 2017, Pages 11-23
نویسندگان
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