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(1 西安建筑科技大學西部綠色建筑國家重點實驗室, 西安 710055; 2 西安建筑科技大學結構工程與抗震教育部重點實驗室, 西安 710055; 3 西安建筑科技大學土木工程學院, 西安 710055)

摘要: 為研究中美規(guī)范關于 RC 剪力墻設計方法的差異,對比了中美規(guī)范 RC 剪力墻約束邊緣構件的相關規(guī)定,通過一字形截面 RC 剪力墻算例,對比分析了剪力墻的承載力和變形性能。 對比結果表明,當其他條件相同時,美國規(guī)范剪力墻的約束邊緣構件長度和體積配箍率均大于中國規(guī)范,兩國規(guī)范剪力墻的正截面承載力均隨著墻肢長度的增大而提高,且美國規(guī)范剪力墻的提高幅度大于中國規(guī)范。 隨著軸壓比的增大,中國規(guī)范剪力墻的抗剪承載力逐漸提高,但美國規(guī)范剪力墻不變。 利用纖維截面分析程序 XTRACT 對分別按中美規(guī)范設計的一字形剪力墻截面進行分析,結果表明,墻肢長度不變時,美國規(guī)范剪力墻的曲率延性高于中國規(guī)范。 整體而言,按美國規(guī)范設計的剪力墻彈塑性變形能力更好。

關鍵詞: 中美規(guī)范對比; RC 剪力墻; 約束邊緣構件; 承載力; 變形能力

中圖分類號:TU375 文獻標志碼:A 文章編號:1002-848X(2022)13-0106-06

DOI:10. 19701 / j. jzjg. 20201628

Comparison of strength and deformability on RC shear wall between Chinese and American codes

SHI Qingxuan1,2,3, QI Desai3

(1 State Key Laboratory of Green Building in Western China, Xi’ an University of Architecture & Technology,Xi’an 710055, China; 2 Key Lab of Structural Engineering and Earthquake Resistance, Minstry of Education (XAUAT),Xi’an 710055, China; 3 School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, China)

Abstract: In order to study the differences in the design methods of RC shear walls in the Chinese and American codes, the relevant regulations of the RC shear wall constrained edge member in the Chinese and American codes were compared, and the calculation of the rectangular section RC shear wall was used to compare and analyze the shear wall strength and deformability. The comparison results show that when other conditions are same, the length of constrained edge member and the volumetric hooping ratio of the American code shear wall are greater than those of the Chinese code. The strength of shear walls between the two countries both increases with the length of the wall, and the improvement of the American codeshear wall is greater than that of the Chinese code. As the axial compression ratio increases, the shear strength of the Chinese code shear wall gradually increases, but the American code shear wall remains unchanged. The fiber section analysis program XTRACT was used to analyze the shear wall section designed according to Chinese and American codes. The results show that when the length of the wall limbs remains unchanged, the curvature ductility of the American code shear wall is higher than that of the Chinese code. On the whole, the elastic-plastic deformability of the shear wall designed by American code is better.

Keywords:comparison of Chinese and American code; RC shear wall; constrained edge member; strength; deformability