欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为考察高温下异形柱与结构中相邻构件之间的相互作用对柱耐火性能的影响,建立了高温下端部受约束的混凝土异形柱数值分析模型。基于二维热分析矩形单元和三维梁单元编制了端部受约束的异形柱高温反应全过程分析程序。利用程序分析了轴向约束和转动约束对柱耐火性能的影响。结果表明：1）在升温过程中,轴向约束会产生较大的附加轴力。当轴向约束刚度较大时,附加轴力可达到常温时轴力的65%左右;2）转动约束可使柱耐火极限显著提高;3）无转动约束时,柱耐火极限随荷载偏心率的增大而减小;但有转动约束时,荷载偏心率对柱耐火极限的影响较小。
英文摘要：
The existing of adjoining members may influence the fire resistance of the heated columns with special-shaped cross section. In order to investigate this influence, this paper proposes a numerical model for end constrained columns with special-shaped cross section at elevated temperature. Using 2-dimensional thermal analysis rectangular elements and 3-dimensional beam elements, a full-process analytical program was developed for the behavior analysis of end constrained columns with special-shaped cross section subjected to fire, and the effects of axial constraint and rotational constraint on the fire resistance are analyzed. The results show： 1） axial constraint will introduce significant additional axial forces in concrete columns, which are approximately 65% of the axial forces at room temperature. 2） rotational constraint can significantly increase the fire resistance of columns with special-shaped cross section. 3） the fire resistance of columns without rotational restraint decreases significantly with an increasing of load eccentricity ratio, but the load eccentricity ratio has little influence on the fire resistance of columns with rotational constraint.
同期刊论文项目
同项目期刊论文
Behavior of axially-and-rotationally restrained concrete columns with ';+';-shaped cross section and
THERMAL RESPONSE TO FIRE OF UNIFORMLY INSULATED STEEL MEMBERS: BACKGROUND AND VERIFICATION OF THE FO
Behaviour of Repaired Concrete Filled Steel Tubular Column to Steel Beam Joints after Exposure to Fi
Experimental behaviour of reinforced concrete (RC) beam to concrete-filled steel tubular (CFST) colu
Performance of CFST column to steel beam joints subjected to simulated fire including the cooling ph
Fire performance of self-consolidating concrete filled double skin steel tubular columns: Experiment
Experimental study on fire performance of axially-restrained normal- and high- strength concrete col
A simple approach for modeling fire-resistance of steel columns with locally damaged fire protection
Temperature Field Analysis of SRC-Column to SRC-Beam Joints Subjected to Simulated Fire including Co
位置：