预应力钢绞线钢筋混凝土框架柱抗震加固设计

框架结构中框架柱是主要承重构件之一,框架柱自身性能对框架整体的抗震性能有着重要影响。研究表明,预应力钢绞线加固RC柱能够抑制早期RC柱显著提高柱的正、斜截面承载力,抗震方面也能够有效地提高柱的延性以及耗能能力。目前研究中乏有预应力钢绞线的加固设计研究,因此限制了该项技术在实际工程中的使用。本文对课题组相关研究成果及各其他相关研究成果和设计规范,从该项技术加固RC框架柱正、斜截面承载力出发,研究了其框架柱抗震加固设计和控制其最终破坏形态的方法。

Study on seismic strengthening design of prestressed steel strand RC frame columns

Column is the vertical bearing member of frame structure, which plays an extremely important role in the seismic performance of the structure. The research shows that the prestressed steel strand reinforced RC column can restrain the early RC column, significantly improve the normal and inclined section bearing capacity of the column, and effectively improve the ductility and energy dissipation capacity of the column in terms of earthquake resistance. At present, there is little research on the reinforcement design of prestressed steel strand, which limits the application of this technology in practical projects. Based on the relevant research results of the research group and other relevant research results and design codes, starting from the bearing capacity of normal and inclined sections of RC frame columns strengthened by this technology, this paper studies the seismic reinforcement design method of RC frame columns and controls its final failure mode.