高強度鋼筋混凝土剪力牆連接梁耐震行為研究

STUDY ON SEISMIC BEHAVIOR FOR HIGH STRENGTH REINFORCED CONCRETE COUPLING BEAMS OF SHEAR WALLS

林敏郎(Min-Lang Lin) ； 王勇智(Yung-Chih Wang) ； 吳仲凱(Chung-Kai Wu)

《中國土木水利工程學刊》 30卷3期 (2018/09) Pp. 209-222

https://doi.org/10.6652/JoCICHE.201809_30(3).0005

摘要

採用連接梁（coupling beams）做連結之連接式剪力牆系統（coupled shear wall）為理想的耐震結構系統之一，具有良好韌性的連接梁影響此結構系統的耐震表現，因此美國ACI 318-14規範對於連接梁有嚴格的設計要求。本研究驗證高強度鋼筋混凝土連接梁之耐震性能，並探討不同對角鋼筋配置型式，共設計五組跨深比為1.5之連接梁試體，並進行反覆載重試驗。在不同之對角鋼筋降伏強度及對角配筋型式變化下，探討新型高強度材料應用於連接梁之受力反應。試驗結果顯示，跨深比為1.5之連接梁若滿足ACI規範配筋要求，其極限層間位移角可達6%；而對角束筋型式為可行之簡化配筋方案。另外，使用高強度對角鋼筋確可有效降低鋼筋比，改善施工難度，連接梁仍可保有良好之耐震性能。

關鍵字

高強度鋼筋混凝土 ； 連接梁 ； 對角配筋 ； 剪力強度 ； 韌性

並列摘要

The coupled shear wall system with coupling beams is one of the ideal seismic structure systems. The coupling beams with good toughness affects the seismic performance of this structural system. Therefore, ACI 318-14 Code has strict design requirements for coupling beams. This study validated the seismic performance of high-strength reinforced concrete connecting beams, and explored the configuration of different diagonal reinforcements. In this study, a total of five coupling beam specimens with a span-to-depth ratio of 1.5 were designed and subjected to repeated load tests. Under different diagonal strength of steel reinforcing bars and changes of diagonal reinforcement patterns, the response of high-strength materials applied to coupling beams is discussed. The test results show that if the high-strength coupling beam with a span-to-depth ratio of 1.5 satisfies the ACI requirements, the ultimate drift angle can reach 6%. The bundled reinforcement pattern is a feasible simplified reinforcement scheme. In addition, the use of high-strength diagonal reinforcement can effectively reduce the steel ratio and improve the construction difficulty, and the coupling beams can still maintain good seismic performance.

並列關鍵字

high-strength reinforced concrete ； coupling beams ； diagonally placed bars ； shear strength ； ductility