臺灣博碩士論文加值系統

本研究探討強度及勁度立面不規則對結構動態行為之影響，主要內容分為兩部分，第一部分以兩層樓模式探討含牆結構在彈性狀態下之動態行為。研究結果顯示含牆結構的動態特性與桿件內力受磚牆勁度與磚牆分布之影響而有所差異，而結構之軟層程度除受樓層之柱勁度影響外，磚牆的分布、磚牆勁度及梁柱勁度比亦為重要影響因素，且磚牆勁度及梁柱勁度比越大，結構底層越有軟層傾向。
第二部分以兩層樓之鋼構剪力屋架模式配合非彈性靜力分析進行研究，探討樓層強度比及勁度比對於結構位移容量、變形集中效應及耐震能力之影響，並尋找結構弱層之合理定義及其影響因素。研究結果顯示定義結構弱層之臨界強度比受材料韌性、後降伏勁度比、柱軸力大小及斷面結實性等因素影響，並不是定值；樓層強度與層剪力比值及樓層勁度與層剪力比值均較強度比、勁度比更適合擔任評估結構規則性之指標；經比較具有相同強度、基本周期及層間位移容量之結構，弱層結構之耐震能力約為強度分配最佳結構之53%~56%。

This study investigates the effect of vertical irregularity due to strength and stiffness on dynamic structural performance. The scope of this study includes two parts. The first part uses a two-story structural model to study the elastic dynamic performance of masonry-infilled structure. The results of this part show that both stiffness and distribution of masonry wall will affect structural dynamic characteristics and member forces. In addition to stiffness of columns, location of masonry walls, stiffness of masonry walls, and beam-to-column ratio are also important parameters for forming a soft story. It is found that the bottom story is vulnerable to become a soft story while stiffness of masonry walls and beam-to-column ratio increase.
The second part uses a two-story steel shear-beam model and a nonlinear static procedure to investigate the effect of story strength ratio and story stiffness ratio on structural displacement capacity, deformation distribution and earthquake resistant capacity; besides, reasonable definition of weak story and the influential parameter will be obtained. The results of this study show that the critical strength ratio which defines weak story is affected by material ductility, yield stiffness ratio, axial force of column, and compaction of section, thus it is not a fixed value. The ratio of story strength and shear force and the ratio of story stiffness and shear force are better indices which estimate the degree of vertical regularity than the ratio of story strength and the ratio of story stiffness. By comparing the structures which have the same strength, fundamental period, and drift capacity, it shows that the earthquake resistant capacity of structures with weak story is about 53 to 56 percent of that of structures with story strength distributed perfectly.

中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VII
符號表 XII
第一章 緒論 1
1.1 研究動機與目的 1
1.2 研究內容與方法 2
第二章 文獻回顧 4
2.1 含牆(磚牆)結構耐震行為之相關研究 4
2.2 以等值斜撐模擬磚牆之相關研究 5
2.3 規範中對於軟弱層之相關規定 8
2.4 軟弱層結構之相關研究 9
2.5 非彈性靜力分析之相關研究 13
第三章 含牆結構在彈性下之動態行為分析 24
3.1含牆結構分析模式之建立與動態特性之分析 24
3.2 含牆結構動態內力分析 28
3.3 含牆結構之軟層問題探討 30
3.3.1 以「樓層勁度比」探討軟層問題 31
3.3.2 以「層間位移比」探討軟層問題 32
3.3.3 以「樓層吸收之應變能比」探討軟層問題 34
3.4 總結 37
第四章 強度及勁度不規則結構之非彈性行為分析 52
4.1 軟弱層結構之分析方式與假設 52
4.2 兩層樓剪力屋架模型之位移容量 53
4.2.1單層剪力屋架模型之基底剪力與頂層位移關 53
4.2.2 兩層樓剪力屋架模型之基底剪力與頂層位移關係 55
4.2.3 樓層強度比與勁度比對於位移容量之影響 62
4.2.4 樓層強度比與勁度比對於層間位移比之影響 70
4.2.5 位移容量考慮變形集中效應之修正 77
4.2.6 桿件韌性與後降伏勁度比對於位移容量之影響 79
4.3 兩層樓剪力屋架模型在地震下的位移需求 80
4.4 兩層樓剪力屋架模型之耐震能力評估 85
4.5 相關文獻結論之驗證 88
4.6梁柱強度比及梁柱勁度比對於臨界強度比之影響 96
4.7 臨界強度比在兩層樓以上結構之應用 99
4.8 總結 101
第五章 結論與建議 153
5.1結論 153
5.2 建議 155
參考文獻 157

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