钢筋混凝土偏心受压构件截面极限承载力影响因素研究

为获得能简便有效地提高钢筋混凝土偏心受压构件截面极限承载力的调整方法,通过对一个矩形截面对称配筋偏心受压柱截面极限承载力进行数值计算,分析了截面高度、截面宽度及纵向钢筋面积等因素对钢筋混凝土偏心受压构件截面极限承载力的影响规律.结果表明:就提高构件的截面极限承载力而言,不论构件属于大偏心受压还是小偏心受压,增大截面高度的效果最显著；当构件属于大偏心受压时,增大纵向钢筋面积比增大截面宽度更有效；当构件属于小偏心受压时,增大截面宽度比增大纵向钢筋面积更有效.基于以上研究成果对各种设计调整方案的适用条件进行了讨论,供相关设计人员参考.

Study on the influence factors to the ultimate bearing capacity of reinforced concrete eccentric compression members

In order to find a method to improve the ultimate bearing capacity of reinforced concrete eccentric compression members,numerical analysis was carried out for a rectangle section symmetric reinforcement concrete eccentric compression column.Several influence factors such as the height and width of the section,the area of longitudinal reinforcement have been investigated,and the influence rule of these factors to the ultimate bearing capacity of the eccentric compression column has been found out.As the improvement of eccentric compression member ultimate bearing capacity is concerned,whether the member is under large eccentric or small eccentric compression,increasing the section height is the most significant method.Under the condition of large eccentric compression,increasing the area of longitudinal reinforcement is more efficient than increasing the section width.While under the condition of small eccentric compression,increasing the section width is more efficient than increasing the area of longitudinal reinforcement.Furthermore the applicable conditions of the adjustment schemes have been discussed,the conclusions can be referenced for designers.