钢筋混凝土构件内折角箍筋的计算与探讨

工程中经常会遇到相邻混凝土构件衔接后形成内折角的情况,例如水电站厂房楼梯的折板、水池构件的侧墙相交部位,以及楼板主梁与次梁的结合部等,但规范和图集对内折角部位箍筋的配置依据并未有明确说明。本文通过分析混凝土构件内折角的受力特点和箍筋的计算方法,提出了在该部位配置箍筋的依据,并探讨了内折角和配筋方式的相互关系。最终计算结论说明:箍筋的配筋量以及间距受内折角角度和截面尺寸的影响,同时箍筋在受拉区和受压区配置的方式对箍筋的纵向承载力有较大影响。

Calculation and discussion on reinforced concrete member inside corner stirrup

Inside corners can be formed after joined by neighboring concrete members,which are frequently ocurred in project,such as the folded plate of stairs in hydropower station workshop,side wall crossed part of water pool members, combined part between main beam and secondary beam,etc.However,there is no clear explanation on the configuration basis of inside corner stirrups in specification and atlas.In the paper,the basis of configuring stirrups in the part is proposed through analyzing the force characteristics of concrete member inside corner and stirrup calculation method.The mutual relation between inside corner and reinforcement mode is discussed.The final calculation conclusion is explained as follows:the stirrup reinforcement quantity and the spacing are affected by inside corner angle and cross section size. Meanwhile,the stirrup configuration mode in tensile zone and pressure zone has great influence on vertical bearing force of the stirrups.