基于结构弹塑性地震反应的柱变轴力加载方法研究

A study on the loading method of varying axial force based on the elasto plastic seismic response of structure

通过对平面框架弹塑性动力反应的分析,本文对地震作用下框架柱的轴力变化规律进行了研究,结果表明,在试验中使轴力与弯矩成比例变化的加载方案与框架柱的实际受力情况最一致,而假定轴力与水平侧移成比例变化则会带来一定的误差,但仍可作为近似的变轴力加载方法。

Based on elasto- plastic seismic response of plane frame, the characteristics of varying axial force in the frame excited by seismic wave are analyzed in this paper. The results indicate that the loading method of varying axial force directly as moment in test is most consistent with the actual working behavior of frame columns. A few errors will come into being if varying axial force directly as horizontal displacements, but this is also a useful approximate loading method of varying axial force.