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RISS 인기검색어
- 검색키워드
- 저자 : Yasmeen T. Obaidat (검색결과 1 건)
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Prediction of residual mechanical behavior of heat-exposed LWAC short column: a NLFE model
Yasmeen T. Obaidat,Rami H. Haddad 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.57 No.2
A NLFE model was proposed to investigate the mechanical behavior of short columns, cast using plain or fibrous lightweight aggregate concrete (LWAC), and subjected to elevated temperatures of up to 700°C. The model was validated, before its predictions were extended to study the effect of other variables, not studied experimentally. The three-dimensional NLFE model was developed using ANSYS software and involved rational simulation of thermal mechanical behavior of plain and fibrous LWAC as well as longitudinal and lateral steel reinforcement. The prediction from the NLFE model of columns' mechanical behavior, as represented by the stress-strain diagram and its characteristics, compared well with the experimental results. The predictions of the proposed models, considering wide range of lateral reinforcement ratios, confirmed the behaviors observed experimentally and stipulated the importance of steel confinement in preserving post-heating mechanical properties of plain and fibrous LWAC columns, being subjected to high temperature.
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