SRC和RC柱耐火性能和抗火设计的若干问题探讨

Several issues on fire performance and fire design of SRC and RC columns

扼要介绍了影响型钢混凝土SRC和RC钢筋混凝土柱耐火极限的可能因素主要有截面尺寸、构件长细比、火灾荷载比、截面配筋率、截面含钢率、荷载偏心率、截面高宽比、钢材和混凝土强度等的几何参数、物理参数和荷载参数等对SRC和RC构件。构件耐火极限的影响规律,探讨了SRC和RC柱耐火性能和抗火设计中的若干问题。

Steel reinforced concrete(SRC) and reinforced concrete(RC) columns are well known members used extensively in engineering structures.Factors influencing on the fire resistance of SRC and RC columns include the sectional dimensions,the slenderness ratio,the load ratio under fire,the steel reinforcement ratio,the section steel ratio,the load eccentricity ratio,the depth to width ratio of the section,the strength of the steel and the concrete.The influence of the changing geometrical parameters,physical parameters and load parameters mentioned above on the fire resistance of SRC and RC members is analysed in this paper,and several issues on the fire performance and fire resistance design are discussed.