(1 西安建筑科技大学西部绿色建筑国家重点实验室, 西安 710055; 2 西安建筑科技大学结构工程与抗震教育部重点实验室, 西安 710055; 3 西安建筑科技大学土木工程学院, 西安 710055)

摘要: 为研究中美规范关于 RC 剪力墙设计方法的差异,对比了中美规范 RC 剪力墙约束边缘构件的相关规定,通过一字形截面 RC 剪力墙算例,对比分析了剪力墙的承载力和变形性能。 对比结果表明,当其他条件相同时,美国规范剪力墙的约束边缘构件长度和体积配箍率均大于中国规范,两国规范剪力墙的正截面承载力均随着墙肢长度的增大而提高,且美国规范剪力墙的提高幅度大于中国规范。 随着轴压比的增大,中国规范剪力墙的抗剪承载力逐渐提高,但美国规范剪力墙不变。 利用纤维截面分析程序 XTRACT 对分别按中美规范设计的一字形剪力墙截面进行分析,结果表明,墙肢长度不变时,美国规范剪力墙的曲率延性高于中国规范。 整体而言,按美国规范设计的剪力墙弹塑性变形能力更好。

关键词: 中美规范对比; RC 剪力墙; 约束边缘构件; 承载力; 变形能力

中图分类号:TU375 文献标志码:A 文章编号: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