钢网格框架墙抗震性能试验研究

发布时间：2018-10-07 18:53

【摘要】：本文针对大跨度公共建筑提出一种新型钢结构承重外墙,按实际工程中的一榀墙架进行1∶1仿真建模并进行低周反复加载试验。分析了墙架的受力过程和破坏模式,并对构件的滞回性能、承载能力、延性、耗能能力等抗震性能指标进行了研究,试验中梁端及柱端截面处的应变值、整榀框架墙的荷载—位移滞回曲线及骨架曲线与有限元分析的数值吻合的均较好。试验表明此种新型钢结构承重外墙在往复荷载作用下具有良好的承载能力,耗能能力以及变形恢复能力,抗震性能良好,破坏形式表现为墙架顶部T形梁出现面外屈曲而引起的局部破坏。有限元分析中分别改变墙顶T型梁和层间H型梁的截面考虑了两者刚度的变化对墙架抗震性能的影响,研究表明墙顶T型梁截面刚度的提高对改善墙架的抗震性能效果明显,层间H型梁的刚度提高对改善墙架抗震性能效果不明显。
[Abstract]:In this paper, a new type of steel structure load-bearing exterior wall is proposed for large span public buildings. According to a wall frame in actual engineering, the 1:1 simulation modeling is carried out and the low-cycle repeated loading test is carried out. The stress process and failure mode of the wall frame are analyzed, and the seismic performance indexes such as hysteretic performance, bearing capacity, ductility and energy dissipation capacity of the members are studied, and the strain values at the end of the beam and the end of the column in the test are studied. The load-displacement hysteretic curve and skeleton curve of the whole frame wall are in good agreement with the finite element analysis. The test results show that this new type of steel structure has good load-bearing capacity, energy dissipation capacity and deformation recovery ability under reciprocating load, and has good seismic performance. The failure form is local failure caused by out-of-plane buckling of T-shaped beam at the top of the wall frame. In finite element analysis, the cross-section of T-beam at the top of the wall and the section of the H-beam on the interstory take into account the influence of the stiffness change of the two on the seismic performance of the wall frame. The research shows that the improvement of the cross-section stiffness of the T-beam on the top of the wall has obvious effect on improving the seismic performance of the wall frame. The improvement of the stiffness of the H-beam is not significant to improve the seismic performance of the wall frame.
【作者单位】：湖南大学土木工程学院;贵州大学空间结构研究中心;
【基金】：“十二五”国家科技支撑计划(2011BAJ09B01)~~
【分类号】：TU391;TU352.11

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