| 摘要: | 建築結構物在進行受地震力作用下之結構設計時，建築結構物之基本振動週期及設計地震力和對應之位移限制為重要之設計參數。雖然世界各國規範對於決定此參數之原理大致相同，但其規定有差異，本研究之一部份在介紹世界著名之規範對此三個參數規定的差異。其中針對地震力的比較結果顯示台灣建築耐震設計規範規定之地震力普遍較其他規範大。在位移限制方面，各規範之規定也不盡相同，早期規範大多限制彈性變位之層間相對位移，較近期之規範部份以要求限制極限變形下之容許層間相對位移，但部份規範仍限制彈性位移，也有規範同時限制彈性與極限狀態下之容許層間相對位移。
在高層鋼筋混凝土構造之建築結構中，剪力牆可有效提供結構物之水平剪力容量，並剪少結構物之水平變形，因此含剪力牆之鋼筋混凝土構造二元系統為抵抗地震力最有效率的建築結構系統之一。國內現行的建築耐震設計規範並無適用剪力牆與抗彎構架複合二元系統之基本振動週期建議公式，而實務上一般取適用其他建築之基本振動週期取代之。
因此本研究之另一部份建立剪力牆之鋼筋混凝土構造二元系統結構公式，使用程式動力分析和收集實測資料之方式，分別求得鋼筋混凝土抗彎構架和剪力牆結構之基本振動週期公式，以理論方式合併成二元系統結構基本振動週期公式，並在二元系統公式中加入抗彎構架佔整體結構之強度比例參數k，以此參數來控制鋼筋混凝土抗彎構架和剪力牆結構分別抵抗之水平力大小，使設計者能更準確推估基本振動週期值，最後以目前台灣所用之規範概念，將所得之公式折減0.7倍(約1/1.4倍，1.4為規範中規定，由其他方法所得之週期不得超過法規週期值1.4倍)，以建議公式和動力分析結果、實際案例動力分析比較，發現建議公式較台灣公式適合用於二元系統中。
;When buildings are design under the earthquake force , the fundamental period and design earthquake force with the displacement limit are the important factors in design . The concept of deciding these factors over the world’s codes are almost same , but the regulation have some different . Th parts of this research is to introduce the different of the three factors in the regulations over the world . To the result of design earthquake force , where the result shows that the design earthquake force in Taiwan’s code is bigger than the other codes . In the displacement limit , the regulations over the world are also different . In early codes , it limits the elastic displacement of relative displacement angle . In recent code , part of the codes limits the limit displacement of relative displacement angle , part of the codes still limits the elastic displacement of relative displacement angle , and part of the codes limits two of the restriction .
In high-rise building structure of reinforced concrete , shear walls can provide the effective shear capacity of structure and reduce the horizontal deformation of structure . Hence , the dual system of reinforced concrete structure with shear wall is one of the most effective building structures in resisting earthquake . There are no appropriate fundamental period formula of shear wall and moment resisting frame dual system in modern building seismic design code , and in practice , it generally uses the fundamental period formula of other structures .
Then , the other part of this research is to establish the fundamental period formula of shear wall and moment resisting frame dual system . By using the modal analysis and collecting the real data , respectively finding the fundamental period formulas of reinforced concrete moment resisting frame and shear wall frame , and combining to the fundamental period formula of dual system by theory . With adding the coefficient k , which is the strength ratio of the moment resisting frame of the whole structure , in dual system formula , it can contol the magnitude of resisting horizontal force of reinforced concrete moment resisting frame and shear wall frame structure to make the designer can estimate the value of the fundamental period more accurately . Finally , by using the concept of Taiwan’s code , redusing the formula of 0.7 times , which is approximately
1/1.4 times where 1.4 is the restriction in the code , the fundamental period getting by other methods can not exceed 1.4 times of the fundamental period getting by codes . Comparing by the recommend formula , dynamic analysis results and real case analysis result , it finds that the recommend formula is more suitable than Taiwan’s formula in dual system . |
