论文部分内容阅读
为揭示部分柱顶滑移钢筋混凝土结构中滑移柱的P-δ效应,首先对该类柱的上端铰接简化模型的有效性进行了验证,在此基础上考察了不同情况下无侧移滑移柱因P-δ效应引发的二阶弯矩的特点,指出了需考虑二阶弯矩的界限条件,并就此提出了无侧移滑移柱弯矩增大系数的确定方法,然后通过参数修正初步考虑了混凝土非线性对前述结果的影响,最后给出了算例分析.研究表明:小震阶段采用普通铰对滑移柱顶部的摩擦支座进行近似处理是可行的;在某些情况下,无侧移滑移柱因P-δ效应引发的二阶弯矩对柱身最大弯矩有增大效应,此时只需利用无侧移滑移柱的一阶弯矩和弯矩增大系数,即可方便地确定其考虑P-δ效应后的柱身最大弯矩.
In order to reveal the P-δ effect of the slipping columns in partial-column slip-slipping reinforced concrete structures, the validity of the upper-hinged simplified model of the columns was verified. Based on the above, The characteristics of the second-order moment caused by the P-δ effect of the moving column are pointed out, and the boundary condition of the second-order moment is to be considered. Based on this, the method to determine the moment- The influence of the nonlinearity of the concrete on the above results is considered initially, and the example analysis is given finally. The results show that it is feasible to use the common hinge to approximate the friction bearings at the top of the slip column during small earthquakes. In some cases , The second-order bending moment caused by P-δ effect increases with the maximum bending moment of the column body without any lateral displacement. In this case, the first-order bending moment and bending moment Large coefficient, you can easily determine its P-δ effect after considering the maximum column moment.