- 學位論文
建築物間留設適當間隙之研究與產生弱層條件之探討
A Study on The Gap Required between Buildings and Conditions Producing Weak Story
摘要
本文前面主要在探討不同建築物振動單元，在同一地震作用下，由於建築物週期不盡相同，所產生的相對位移，須留設適當之間隙防止碰撞。利用三組與規範反應譜相符地震歷時進行非線性動力歷時分析，得其樓層最大相對位移，並以此結果與反應譜CQC法所得之總側位移做比較。所使用的變數包括週期的差異、不同地區的設計地震加速度係數。 在實例分析中，建立不同樓層數之建築物模型藉此變更週期，建築物各層樓使用質點來簡化模擬分析，討論兩個不同週期的振動單元其相對位移。接著再以不同地區的地震加速度係數為變數，分析在不同地區時對於相對位移的影響，以調整係數C來表示其關係並與現行95年耐震規範防碰撞間隙距離比較，找出不合理處，提出一套簡易的估算公式，方便工程師使用。 後面探討建築物弱層發生的條件。一般設計出的建築物，越上層其餘裕度 越大；建築物規模越大，其降伏後與降伏前之勁度比值 也越大。探討不同高度建築物下 與 之組合，利用三組與設計反應譜相符地震歷時進行非線性動力歷時分析，以建立檢核標準。
並列摘要
The purpose of this thesis was to study relative displacements of different buildings under earthquakes because the different buildings have different period. It need stay for requires gap to prevent collision. In this study, three earthquake time histories corresponding to the design spectrum were applied to nonlinear dynamic time history analysis of the model. The above results were compared with the results of CQC method. The parameters used of the dynamic analysis include period of model, the coefficient of corresponding to the design spectrum. In the analysis, we created different floor of the building models to change period, and the floor of the building used the single particle to simplify simulation to analysis. The parameters used of the analysis were period, to discuss the influence of two vibrant models in the different periods for the relative displacement. Then regard different coefficients of seismic acceleration of in different areas, analyse the influence on relative displacement when different in the area, and simplify the relation between relative displacement and total displacement of CQC method to coefficient C for the engineer to use. Next, we study conditions producing weak story. Building designs in general, its higher floor may be over designed. A building is larger, its stiffness after yield is larger. We explore the relationship between the two conditions and create a method to determine what producing weak story.