臺灣博碩士論文加值系統

本研究旨在探討高強度鋼筋混凝土梁使用高強度焊接剪力鋼筋來代替135度耐震彎鉤剪力鋼筋的可行性，並驗證高強度剪力鋼筋使用設計強度550MPa是否合理。本論文共測試三座高強度鋼筋混凝土梁，實驗結果顯示焊接型剪力鋼筋比135度耐震彎鉤更有效的增進試體的變形能力與位移韌性，試體使用焊接型高強度剪力鋼筋的試體在VnL/Mpr=0.65的設計剪力強度可以達到極限層間位移量6.00%，增加VnL/Mpr至2.00會改變試體的破壞模式但是對提升層間位移量的影響有限，而高強度剪力鋼筋使用設計強度550MPa應屬合理，另外使用試體設計公式可以保守預測試體的彎矩強度。

The potential of using welded high-strength steel as shear reinforcement in the high-strength reinforced concrete (RC) beam members is studied in this research. A total of three high-strength RC beam specimens are tested. Experimental results show that the specimen with welded hoops exhibits better deformation capacity and ductility compared to the specimen with seismic hoops consisting of 135 degree standard seismic hooks. With the provided shear-to-probable moment capacity of VnL/Mpr =0.65, the specimens with welded hoop failed at ultimate drift ratio of 6.00%. An increase of VnL/Mpr ratio to 2.00 does not improve the deformation capacity further but changes the failure mode from flexure-shear to flexure failure. Based on the observations, an upper bound of 550 MPa may be reasonable assumed as the designed strength of the high-strength stirrup, specifically SD785 high-strength steel. The proposed equations to evaluate the flexural strength of high-strength beam specimens also provide reasonable and conservative predictions.

摘要
ABSTRACT
目錄
圖目錄
表目錄
第一章 緒論
1.1 研究背景
1.2 研究動機
1.3 研究目的
1.4 論文內容編排
第二章 文獻回顧
2.1 混凝土應力區塊
2.2 焊接型剪力鋼筋
2.3 高強度剪力鋼筋
第三章 試體規劃
3.1 試體設計
3.2 測試配置
3.3 量測系統配置
3.4 測試步驟
3.5 試體設計公式
第四章 試體結果與分析
4.1 前言
4.2 材料試驗
4.2.1 混凝土
4.2.2 高強度鋼筋
4.3 試體破壞模式
4.4 試體載重與位移行為曲線
4.4.1 試體之勁度衰減
4.4.2 試體能量消散能力
4.5 試體外部撓曲變形分析
4.6 應變計量測
4.7 試體設計公式結果
第五章 結論
參考文獻
附錄A 符號說明

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