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  • 學位論文

有邊界構材之鋼板混凝土複合牆 之耐震行為與分析研究

A Numercial Study of the In-Plane Behavior of Steel-Plate Composite Walls with Boundary Elements

指導教授 : 黃尹男

摘要


鋼板混凝土複合牆為核能電廠中常見之複合材料結構元件,現今設計規範僅針對不含邊界構材之鋼板混凝土複合牆提出剪力強度及撓曲強度之設計公式,但對於含有邊界構材之鋼板混凝土複合牆設計強度並未規定,然實際應用此類結構元件時,應考量邊界構材之影響,且目前僅有少數文獻提出含邊界構材鋼板混凝土複合牆之剪力強度預估公式,為了更瞭解含邊界構材之鋼板混凝土複合牆之耐震性能,本研究首先以有限元素軟體LS-Dyna建立分析模型,並以試驗結果驗證模型之準確性,進一步利用分析模型探討鋼板混凝土複合牆之設計參數對其剪力強度及撓曲強度之影響。   本研究於國家地震工程研究中心完成四座有邊界構材之鋼板混凝土複合牆擬靜態反覆載重試驗,其破壞模式包含剪力主控及撓曲主控之破壞,本研究以該試驗結果驗證有限元素軟體LS-Dyna所建立之鋼板混凝土複合牆模型之準確性,模型包含試驗牆體與基座之模擬,結果顯示有限元素分析模型可準確預估鋼板混凝土複合牆之極限強度、初始勁度及剪力破壞試體之遲滯行為。本研究進一步建立54座不同設計參數之有限元素模型,探討高寬比、鋼材比及混凝土抗壓強度對含有邊界構材之鋼板混凝土複合牆極限強度之影響程度,由分析結果發現,牆體高寬比與混凝土抗壓強度皆對剪力強度有較大之影響,相較於前兩種參數,鋼材比對於剪力強度之影響較不顯著;鋼材比對撓曲強度有較大之影響性,其次為高寬比,混凝土抗壓強度對撓曲強度造成之影響極為微小。

並列摘要


Steel-plate composite(SC) walls are being commonly used for the construction of containment structures in nuclear power plants. SC walls can be designed using Supplement No. 1 to AISC N690, but AISC N690 do not include design formulas for the strength of SC walls with boundary elements or flanges. More research is needed to study the seismic behavior and design of SC walls with boundary elements.   This research focused on the in-plane behavior of shear critical and flexure critical of SC walls with boundary elements. The SC walls studied in this study were composed of two steel faceplates, two endplates, and infill concrete. This research includes an experimental study executed in the laboratory of National Center for Research on Earthquake Engineering (NCREE) in Taiwan and a parametric study to identify key parameters for the design of SC walls. In the experimental program, four specimens were subjected to displacement-controlled cyclic loading. The results were used to validate the finite-element models developed in LS-DYNA for the four tested SC walls with boundary elements. A parametric study was then conducted using the validated technic to investigate the effects of wall aspect ratio, reinforcement ratio, wall thickness, and concrete compressive strength on the in-plane strength of SC walls with boundary elements.

參考文獻


[25]陳柏安(2015),低矮型鋼板混凝土複合牆之耐震性能試驗與分析,國立台灣大學工學院土木工程學系碩士學位論文。
[8]Varma, A. H., Zhang, K., Chi, H., Booth, P., and Baker, T. "In-plane shear behavior of SC composite walls: theory vs. experiment." Proc., Proceedings of the 21st IASMiRT Conference (SMiRT 21).
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[9]Varma, A. H., Malushte, S. R., Sener, K. C., and Lai, Z. (2014). "Steel-plate composite (SC) walls for safety related nuclear facilities: Design for in-plane forces and out-of-plane moments." Nuclear Engineering and Design, 269, 240-249.

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