束型框筒結構側向勁度加強分析

Abstract

框筒結構為現今許多高樓建築採用的結構模式,而束型框筒結構為一般框筒的改良型模式,且也應用於實際案例之中。對於超高樓結構而言,風力載重所造成的側位移影響遠比地震所造成的還需要優先考慮,因此這篇論文主要是在討論如何增加受水平風力下束形框筒結構之的側向勁度。 主要嘗試的方法有縮短各個內柱之間的距離、於結構體加上剛臂支架系統或者加上大型支撐型的對角斜撐。利用這三種可增加束型框筒結構側向勁度的方法,於SAP2000的建模分析之下,相互比較受水平風力下的側位移、結構柱的軸力以及束型框筒結構中出現的剪力延遲效應。

The most generally used structural type to build a tall building is Bundled-Tube Structure, and Bundled-Tube Structure which also usually being used to build a tall building is one type of modified Framed-Tube Structure. In the case of tall buildings, displacement caused under wind load is more important than displacement caused by earthquake. Therefore, how to increase the stiffness of Framed-Tube Structure under wind load is mainly discussed in this paper. Shortening distance of every column, attaching Outrigger-Braced Structure to structure and adding Big-Bracing to structure is the main way I used for increasing stiffness of Bundled-Tube Structure. Then i did a comparative analysis between displacement caused by wind load, stress of columns and shear lag through the analysis of SAP2000.