低烈度区低配筋多层剪力墙结构抗震性能分析

发布时间：2019-04-25 22:51

【摘要】：为研究低烈度区多层剪力墙结构采用比现行规范规定偏低配筋时的抗震性能和工程应用可能性,针对4种不同平面布置形式的多层剪力墙结构,依据现行结构设计规范,分别按抗震设防烈度6度、7度(0.10g和0.15g)进行抗震设计,并减少结构设计规范要求的墙身构造钢筋量,形成低配筋多层剪力墙结构。经对设计完成的相同平面布置的低配筋剪力墙结构的截面和配筋情况进行对比,发现6度和7度(0.10g)设防区的构件截面和配筋完全相同,而与7度(0.15g)设防区稍有差别。采用Perform-3D程序对设防烈度7度区低配筋多层剪力墙结构进行非线性动力反应分析,结果表明:结构在7度罕遇地震作用下的地震反应很小,进入非线性的区域不大,结构损伤轻微;对比墙身配筋率显著小于低配筋多层剪力墙结构的剪力墙试件试验结果发现,在7度罕遇地震作用下,低配筋多层剪力墙结构中剪力墙的损伤很小,且最大层间位移角远小于其极限位移角。因此,低配筋多层剪力墙结构的抗震性能良好,可以在低烈度抗震设防区(6度和7度区)采用。另外,根据分析结果,建议墙体水平和竖向分布钢筋配筋率分别为0.15%和0.10%。
[Abstract]:In order to study the seismic behavior and engineering application possibility of multi-storey shear wall structure with lower reinforcement than the existing code in low intensity area, the design code of multi-story shear wall structure with four different plane layout forms is presented, which is based on the current code for the design of multi-story shear wall structure. According to the seismic fortification intensity of 6 degrees, 7 degrees (0.10g and 0.15 g) respectively, the seismic design was carried out, and the steel reinforcement of the wall body required by the structural design code was reduced to form the multi-storey shear wall structure with low reinforcement. By comparing the section and reinforcement of the low reinforcement shear wall structure with the same plane layout, it is found that the section and reinforcement of the members in the 6-degree and 7-degree (0.10g) fortified area are identical. However, it is slightly different from the 7-degree (0.15 g) fortification area. The nonlinear dynamic response analysis of the multi-story shear wall structure with low reinforcement in the 7-degree zone is carried out by using the Perform-3D program. The results show that the seismic response of the structure under the rare earthquake of 7-degree is very small, and the seismic response into the non-linear region is small. The structure damage was slight; Compared with the test results of the shear wall with lower reinforcement ratio, the results show that the damage of shear wall in the low reinforcement multi-story shear wall structure is very small under the rare earthquake of 7 degrees, and the damage of the shear wall in the low reinforcement multi-story shear wall structure is less than that in the low reinforcement multi-story shear wall structure. The maximum inter-layer displacement angle is much smaller than the limit displacement angle. Therefore, the seismic performance of the low-reinforced multi-storey shear wall structure is good, and it can be used in the low-intensity seismic fortification zone (6 degrees and 7 degrees). In addition, according to the analysis results, it is suggested that the reinforcement ratio of horizontal and vertical distribution of the wall is 0.15% and 0.10%, respectively.
【作者单位】：中国建筑科学研究院;重庆大学山地城镇建设与新技术教育部重点实验室;
【基金】：中国建筑科学研究院自筹基金课题(20070106330730011) 重庆市建委科研项目(城科字2008第70号)
【分类号】：TU352.11;TU398.2

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