传统框架及楼板局部设缝框架梁端剪力增大系数分析

发布时间：2018-06-22 02:08

  本文选题：剪力增大系数 + 框架　； 参考：《世界地震工程》2015年04期

【摘要】：梁端剪力增大系数是实现结构"强剪弱弯"的关键措施之一。分析了传统框架的梁端剪力增大系数,表明现浇楼板对框架梁端抗剪承载力的影响不可忽略,抗震规范给出的梁端剪力增大系数难以实现梁"强剪弱弯"的抗震要求,由此对框架梁侧楼板局部设缝,以消除楼板对框架梁端抗弯承载力的贡献。进而分析了该楼板局部设缝框架的梁端剪力增大系数,表明当框架底部实配钢筋αAs≤1.1βAs+0.1As时,即框架梁端底部实配钢筋面积不超过该处计算配筋面积的1.1倍与支座负弯矩配筋面积的0.1倍之和时,现行抗震规范给出的梁端剪力增大系数对于楼板局部设缝的框架可以实现"强剪弱弯"的要求,从而使梁弯曲破坏先于受剪破坏。
[Abstract]:The increasing coefficient of shear force at the end of beam is one of the key measures to realize "strong shear and weak bending" of structure. The effect of cast-in-place floor slab on the shear capacity of frame beam end is analyzed, which indicates that the influence of cast-in-place floor slab on the shear bearing capacity of frame beam can not be ignored, and the shear increase coefficient of beam end given in seismic code is difficult to meet the seismic requirements of "strong shear and weak bending". In order to eliminate the contribution of the floor to the flexural bearing capacity of the frame beam, the local joint is arranged on the side floor of the frame beam. Furthermore, the increase coefficient of shear force at the beam end of the partially jointed frame is analyzed. It is shown that when the reinforcement 伪 as 鈮，

本文编号：2051070