高强钢组合单层单跨Y型偏心支撑框架受力性能有限元分析

发布时间：2018-02-27 04:19

本文关键词： 高强钢 Y型偏心支撑框架有限元滞回性能耗能梁段　出处：《西安建筑科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：高强钢组合单层单跨Y型偏心支撑框架具有良好的抗震性能,其中耗能梁段采用低强度的钢材,保证了在强烈地震下结构具有良好的延性和耗能能力,其他构件采用高强度的钢材以节约材料从而降低造价。因此研究该结构的抗震性能对在抗震高的地区的应用有重要的意义。本文使用ABAQUS有限元软件对高强钢组合单层单跨Y型偏心支撑框架进行模拟,首先建立了1:2缩尺的试件并对其进行单调加载和循环加载分析,将结果与本课题组所做的试验结果进行对比。有限元分析的结果与试验的结果吻合的比较好,为之后的参数分析提供了依据。随后,本文对高强钢组合单层单跨Y型偏心支撑框架进行了单调加载下和循环加载下受力性能的有限元分析。主要考虑了耗能梁段长度、耗能梁段的腹板厚度、耗能梁段的腹板高度、耗能梁段的加劲肋间距及不同强度的钢材组合对高强钢组合单层单跨Y型偏心支撑框架的受力性能的影响。结果表明,为了保证高强钢组合单层单跨Y型偏心支撑框架具有良好的抗震性能,耗能梁段长度宜选取(0.7～1)Mp/Vp；高强钢组合偏心支撑框架的高厚比可以放宽在(33-45)的范围内试件的整体性能发挥的比较好,换算成统一范围为46(?)235/fy～63(?)/235/fy；耗能梁段加劲肋间距对耗能梁段腹板的应力分布影响较大,加劲肋间距越小,应力分布的越均匀并且应力的最大值越小；在构件截面相同的情况下,高强钢组合的Y型偏心支撑框架的受力性能比普通的Y型偏心支撑框架的受力性能要好,而且通过对几种不同强度钢材组合的框架进行分析对比发现,Q235钢材与Q460钢材组合的试件整体受力性能发挥的最好。
[Abstract]:The single-story single-span eccentrically braced frame with high strength steel has good seismic performance, and the energy dissipation beam section is made of low strength steel, which ensures that the structure has good ductility and energy dissipation ability under the strong earthquake. Other members use high strength steel to save materials and reduce the cost. Therefore, it is important to study the seismic performance of the structure in areas with high earthquake resistance. In this paper, the ABAQUS finite element software is used to simulate the single monolayer single-span eccentric braced frame of high strength steel. First, the specimen of 1: 2 scale is established and analyzed by monotonic loading and cyclic loading. The results of finite element analysis are in good agreement with the experimental results, which provides a basis for the later parameter analysis. Then, the finite element analysis of the behavior of single-story single-span Y-type eccentrically braced frame with high strength steel under monotonic loading and cyclic loading is carried out. The length of energy-dissipation beam and the thickness of the web of energy-dissipating beam are considered. The influence of the web height of the energy-dissipation beam section, the stiffening rib spacing of the energy-dissipation beam section and the steel combination of different strength on the mechanical behavior of the single-story single-span Y-type eccentric braced frame with high strength steel composite, the results show that, In order to ensure the good seismic behavior of single-story single-span single-span eccentrically braced frame with high strength steel, The length of the energy dissipation beam section should be chosen to be 0.7m / Vp / Vp; the ratio of height to thickness of high strength steel composite eccentrically braced frame can be relaxed in the range of 33-45) and the overall performance of the specimen is better, which can be converted into a unified range of 46? 23 5% FYY 63? The stiffening rib spacing of energy-dissipating beam section has a greater influence on the stress distribution of the energy dissipation beam web. The smaller the stiffening rib spacing, the more uniform the stress distribution and the smaller the maximum stress; when the section of the member is the same, The mechanical behavior of Y-type eccentrically braced frame combined with high-strength steel is better than that of common Y-eccentrically braced frame. Through the analysis and comparison of several different strength steel combination frame, it is found that Q235 steel and Q460 steel combination of the overall mechanical properties of the best performance.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU391

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