ABSTRACT

In order to avoid local buckling at the edge of infill plates, perforations were introduced in the buckling-restrained steel plate shear wall (BRW) in this paper. And a shaking table test on a 1/4 scaled, four-storey, perforated BRW structure was performed to investigate seismic behavior of BRW structures. During the test, no failure at the edge of the infill plate was observed. The test structure remained essentially intact till the end of the 1.2 g excitations and the residual deformation of the test structure was negligible. In addition, the fundamental frequency of the test structure decreased only 2% after 1.2 g excitations, indicating that there is no need to repair this perforated BRWs structure. The input energy from earthquake was mainly dissipated in first two storeys, in spite of the maximum drifts of each floors differed little from others, as the interstorey drift of the upper storeys were dominated by the overturning effect of the lower storeys. A finite-element (FE) model of the test structure (donated as BR model) was developed using the shell element provided by ABAQUS/Standard, and numerical values agreed well with the test results. Finally, the seismic behaviors of the BR model and a perforated steel plate shear wall structure model (donated as SP model) were compared to show the discrepancies of those two on overall responses, shear force participating ratios of the infill plate, the stress distribution of the infill plate and the additional influences on boundary columns.

摘要

为了避免填充板边缘的局部屈曲，本文在抑制屈曲的钢板剪力墙（BRW）中引入了穿孔。并对一个 1/4 比例的四层穿孔 BRW 结构进行了振动台试验，以研究 BRW 结构的抗震性能。在测试过程中，没有观察到填充板边缘出现故障。直到 1.2 g 激发结束，测试结构基本保持完好，并且测试结构的残余变形可以忽略不计。此外，测试结构的基频在 1.2 g 激发后仅下降 2%，表明无需修复这种穿孔 BRW 结构。地震输入的能量主要在前两层消散，尽管每层的最大漂移与其他楼层差别不大，因为上层的层间漂移主要由下层的倾覆效应主导。使用ABAQUS/Standard提供的壳单元开发了试验结构的有限元（FE）模型（捐赠为BR模型），数值与试验结果吻合良好。最后，比较了BR模型和穿孔钢板剪力墙结构模型（捐赠为SP模型）的抗震性能，显示了两者在整体响应、填充板剪力参与比、应力分布等方面的差异。填充板和对边界柱的附加影响。使用ABAQUS/Standard提供的壳单元开发了试验结构的有限元（FE）模型（捐赠为BR模型），数值与试验结果吻合良好。最后，比较了BR模型和穿孔钢板剪力墙结构模型（捐赠为SP模型）的抗震性能，显示了两者在整体响应、填充板剪力参与比、应力分布等方面的差异。填充板和对边界柱的附加影响。使用ABAQUS/Standard提供的壳单元开发了试验结构的有限元（FE）模型（捐赠为BR模型），数值与试验结果吻合良好。最后，比较了BR模型和穿孔钢板剪力墙结构模型（捐赠为SP模型）的抗震性能，显示了两者在整体响应、填充板剪力参与比、应力分布等方面的差异。填充板和对边界柱的附加影响。