本文關(guān)鍵詞： 高強(qiáng)鋼 Y型偏心支撐框架 有限元 滯回性能 耗能梁段　出處：《西安建筑科技大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：高強(qiáng)鋼組合單層單跨Y型偏心支撐框架具有良好的抗震性能,其中耗能梁段采用低強(qiáng)度的鋼材,保證了在強(qiáng)烈地震下結(jié)構(gòu)具有良好的延性和耗能能力,其他構(gòu)件采用高強(qiáng)度的鋼材以節(jié)約材料從而降低造價(jià)。因此研究該結(jié)構(gòu)的抗震性能對(duì)在抗震高的地區(qū)的應(yīng)用有重要的意義。 本文使用ABAQUS有限元軟件對(duì)高強(qiáng)鋼組合單層單跨Y型偏心支撐框架進(jìn)行模擬,首先建立了1:2縮尺的試件并對(duì)其進(jìn)行單調(diào)加載和循環(huán)加載分析,將結(jié)果與本課題組所做的試驗(yàn)結(jié)果進(jìn)行對(duì)比。有限元分析的結(jié)果與試驗(yàn)的結(jié)果吻合的比較好,為之后的參數(shù)分析提供了依據(jù)。 隨后,本文對(duì)高強(qiáng)鋼組合單層單跨Y型偏心支撐框架進(jìn)行了單調(diào)加載下和循環(huán)加載下受力性能的有限元分析。主要考慮了耗能梁段長度、耗能梁段的腹板厚度、耗能梁段的腹板高度、耗能梁段的加勁肋間距及不同強(qiáng)度的鋼材組合對(duì)高強(qiáng)鋼組合單層單跨Y型偏心支撐框架的受力性能的影響。結(jié)果表明,為了保證高強(qiáng)鋼組合單層單跨Y型偏心支撐框架具有良好的抗震性能,耗能梁段長度宜選取(0.7～1)Mp/Vp；高強(qiáng)鋼組合偏心支撐框架的高厚比可以放寬在(33-45)的范圍內(nèi)試件的整體性能發(fā)揮的比較好,換算成統(tǒng)一范圍為46(?)235/fy～63(?)/235/fy；耗能梁段加勁肋間距對(duì)耗能梁段腹板的應(yīng)力分布影響較大,加勁肋間距越小,應(yīng)力分布的越均勻并且應(yīng)力的最大值越��；在構(gòu)件截面相同的情況下,高強(qiáng)鋼組合的Y型偏心支撐框架的受力性能比普通的Y型偏心支撐框架的受力性能要好,而且通過對(duì)幾種不同強(qiáng)度鋼材組合的框架進(jìn)行分析對(duì)比發(fā)現(xiàn),Q235鋼材與Q460鋼材組合的試件整體受力性能發(fā)揮的最好。
[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.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU391

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