外包式钢柱脚设计方法研究及其在加建改造中的应用

Study on Design Method of Encased Steel Column Bases and the Application in Building Reconstruction

目前国内规范对于外包式钢柱脚的设计计算原则、设计计算方法还存在矛盾和不足。依据强连接弱构件的基本抗震原理要求,采用二阶段设计原则,并利用混凝土结构、钢结构等构件承载力设计计算原理和方法,以及现有的试验结果,提出了一套较完整、合理、可行的外包式钢柱脚的设计计算方法及公式。以该设计方法和公式,在实际加建工程中设计应用,获得了较大的经济利益。同时,外包式钢柱脚的受力机理、钢柱偏置等等问题仍有待后续研究。

According to domestic code,there are still some contradictions and deficiency about the design and calculate of encased steel column bases. According to the basic seismic principle of strengthen connection weaken component,adoption the twice phase design principle,using the calculate principle and design method of component capacity in concrete structure and steel structure,depending on the existing experimental results,a relatively complete reasonable and feasible design method and formula of encased steel column bases is proposed. These design method and formulas are tested and verified by the existing experimental result. Using these design method and formulas,the real design of the encased steel column bases are applied in the real building extension. The great economic benefits are received. There are still some problems about the design of encased steel column bases,such as the load transfer mechanism and eccentric steel column problems. These problems need more research.