钢板剪力墙震后型钢斜劲修复结构的抗震性能研究  

Seismic behavior of steel plate shear walls after earthquake reinforced by section steel oblique stiffener

作　　者：郝际平[1] 吴博睿 于金光[1] 于海升 杜一鹏[1] HAO Jiping;WU Borui;YU Jinguang;YU Haisheng;DU Yipeng(College of Civil Engineering,Xi'an University of Architecture&Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《建筑结构学报》2020年第5期43-52,共10页Journal of Building Structures

基　　金：国家重点研发计划项目(2016YFC0701201);国家自然科学基金项目(51578442,51408461)。

摘　　要：为研究钢板剪力墙结构在遭遇震害后的修复方法和修复后结构的抗震性能,对一榀缩尺比1∶3的单跨两层薄钢板剪力墙进行原始结构和修复结构低周往复荷载试验研究,在原结构加载结束后对受损结构采用型钢斜加劲肋的方法进行原位修复,研究钢板剪力墙震后型钢斜劲修复方法的有效性和修复后结构的抗震性能。同时,采用有限元软件ABAQUS模拟修复过程,进行修复结构与未修复结构二次遭遇低周往复荷载作用的性能对比研究,以及修复结构中型钢斜肋的肋板刚度比参数分析。研究结果表明:在设防地震阶段采用斜劲修复后,结构内嵌钢板面外变形得到有效恢复,斜劲修复与加固方法可行,同时有限元的"生死单元"法也可较好地实现修复过程的模拟;修复结构的承载力、弹性刚度和能量耗散量显著提高,分别相较未修复结构的提升12.06%、36.57%和57.72%;同时,斜劲修复有效减小了内嵌板的面外变形量,变形量较未修复结构降低37.69%,斜劲修复用肋的肋板刚度比阈值可选用50,即为传统纵横加劲钢板剪力墙竖向肋板刚度比的限值。In order to study the repair method of the steel plate shear wall(SPSW)structure after encountering the earthquake damage and investigate the seismic performance of the repaired structure, the cyclic load test of a single-span two-story thin SPSW structure with an aspect ratio of 1∶3 was carried out. After the original structure was loaded, the structural in-situ repair was carried out by using the section steel oblique stiffeners on the damaged structure,and then the seismic performance of SPSW reinforced by the section steel oblique stiffener was studied. At the same time, using the finite element software ABAQUS, the simulation method of the repair process was carried out, and the performance comparison between the repaired structure and the unrepaired structure was observed. The results show that in the mid-seismic stage, the out-of-plane deformation of the infill steel plate is effectively restored after the oblique repairing. The oblique repair and reinforcement method is feasible, and the ‘active and inactive element’ method in FEA can also better simulate the repair process. The capacity, elastic stiffness and energy dissipation of the repaired structure are significantly improved. The bearing capacity, initial elastic stiffness and energy dissipation were increased by 24.08%, 36.57% and 57.72%, respectively, compared with the unrepaired structure. The amount of out-of-plane deformation of the inner filler plate is reduced, and the deformation is reduced by 37.69% compared with the unrepaired structure. The rib stiffness ratio of the ribbed repair can be selected as 50, which is the limit of the vertical rib stiffness ratio of the conventional vertical and horizontal stiffened steel shear wall.

关 键 词：钢板剪力墙 震后修复 斜加劲 肋板刚度比 拟静力试验 抗震性能 

分 类 号：TU392.4[建筑科学—结构工程] TU317.1