应用新型滑移隔震装置模型结构振动台试验及地震反应分析

发布时间：2018-06-15 16:32

本文选题：隔震结构 + 振动台试验　；参考：《西安建筑科技大学》2015年博士论文

【摘要】：由于摩擦系数的限制,摩擦滑移隔震技术早期主要被研究应用到一些高宽比小、高度低的砖混砌体结构中,对框架结构的研究还较少。二硫化钼具有摩擦系数小、承载能力高、使用寿命长以及温度适应范围广等优点,是一种理想的固体润滑剂。文中首先以新型固体润滑材料,即二硫化钼涂层材料为主,设计并制作了一种新型滑移隔震装置,同时采用MTS电液伺服试验系统,进行了新型摩擦滑移隔震支座的力学性能试验,建立了相应的力学分析和计算模型。试验和分析结果均表明,二硫化钼材料涂层施工简单,力学性能非常稳定,摩擦系数较小(0.04~0.06),竖向承载力较高,是一种理想的摩擦滑移涂层材料;文中研发的新型滑移隔震装置具有摩擦滑移隔震和限位等功能,构造简单,适用性强,可应用于实际工程。其次,建立了欠人工质量模型的一致相似关系,并根据其设计制作了一个相似比为1/5的2跨5层框架模型结构,进行了多种工况下安装和未安装文中研发的新型摩擦滑移隔震装置的框架模型结构模拟单向地震振动台对比试验,检验了新型摩擦滑移隔震装置的单向隔震和限位性能,探讨了相应的隔震和限位规律,提出了安装新型滑移隔震装置结构的有限元分析和计算方法。单向振动台试验和有限元分析结果均表明,文中研发的新型滑移隔震装置的单向隔震和限位效果明显,一般情况下,隔震结构的地震加速度反应比抗震结构的减小约(30~50)%,层间剪力减小约(20~50)%,总位移反应减少约(25~50)%。另外,考虑竖向地震作用对隔震结构的影响,进行了上述框架模型结构单、竖向地震耦合作用时的模拟地震振动台试验和有限元分析,对比分析了单、竖向地震耦合作用与相应抗震结构和单向隔震结构的隔震效果和限位性能,探讨了影响隔震效果的主要因素,提出了相应的分析方法,同时进行了水平双向耦合地震作用下隔震结构的有限元分析,研究了双向水平地震作用对隔震结构的影响。试验和有限元分析均表明,一般情况下,考虑竖向地震作用时,结构的隔震效果将减小50%左右,考虑双向水平地震作用时,结构的单向隔震效果将降低约40%,但仍有较好的隔震效果,工程应用时应予以适当考虑。最后,本文在摩擦滑移隔震结构振动台试验研究的基础上,吸取国内外的研究成果和实际工程建设经验,借鉴相关行业的标准、规范。给出了滑移隔震结构设计的方法和建议,为摩擦滑移隔震实际工程设计应用提供参考及技术支撑。
[Abstract]:Because of the limit of friction coefficient, friction slip isolation technology is mainly used in some brick-concrete masonry structures with small aspect ratio and low height in the early stage, and the research on frame structure is still few. Molybdenum disulfide is an ideal solid lubricant because of its small friction coefficient, high bearing capacity, long service life and wide range of temperature adaptation. In this paper, a new type of sliding isolation device is designed and fabricated with a new solid lubricating material, that is, molybdenum disulfide coating material. At the same time, the MTS electro-hydraulic servo test system is used. The mechanical properties of the new friction-slip isolation bearing are tested and the corresponding mechanical analysis and calculation model are established. The results of test and analysis show that the coating of molybdenum disulfide material is a kind of ideal friction slip coating material because of its simple construction, stable mechanical properties, low friction coefficient (0.04 ~ 0.06) and high vertical bearing capacity. The new sliding isolation device developed in this paper has the functions of friction sliding isolation and limit of position, simple structure and strong applicability, so it can be used in practical engineering. Secondly, the uniform similarity relation of the under-artificial quality model is established, and according to its design, a 2-span five-story frame structure with a similarity ratio of 1 / 5 is made. A comparative test of the frame model of a new type of friction-slip isolator developed in this paper under various working conditions is carried out to test the unidirectional isolation and limit performance of the new friction-slip isolator. The corresponding law of isolation and limit is discussed, and the finite element analysis and calculation method for the structure of new sliding isolation device are put forward. The results of unidirectional shaking table test and finite element analysis show that the unidirectional isolation and limit effect of the new sliding isolation device developed in this paper are obvious, generally speaking, The seismic acceleration response of the isolated structure is less than that of the seismic structure, the interstory shear force is reduced by about 20 / 50 and the total displacement response is reduced by about 25 / 50. In addition, considering the influence of vertical earthquake action on isolated structure, the shaking table test and finite element analysis of the frame model single and vertical earthquake coupling are carried out, and the single frame model is compared and analyzed. The vertical seismic coupling effect, the isolation effect and the limiting performance of the corresponding seismic structure and the unidirectional isolated structure are discussed. The main factors affecting the isolation effect are discussed, and the corresponding analysis method is put forward. At the same time, the finite element analysis of the isolated structure under the horizontal and bidirectional coupling earthquake is carried out, and the effect of the bidirectional horizontal earthquake on the isolated structure is studied. Both the test and the finite element analysis show that, in general, when vertical earthquake is considered, the isolation effect of the structure will be reduced by about 50%, and when the bidirectional horizontal earthquake is taken into account, the isolation effect of the structure will be reduced by about 50%. The unidirectional isolation effect of the structure will be reduced by about 40%, but there is still a good isolation effect, which should be taken into account in engineering application. Finally, on the basis of the experimental research on the vibration table of friction-slip isolation structure, the paper draws on the domestic and foreign research results and practical engineering construction experience, and draws lessons from the standards and specifications of the relevant industries. The design methods and suggestions of sliding isolation structures are given, which provide reference and technical support for the practical engineering design and application of frictional sliding isolation structures.
【学位授予单位】：西安建筑科技大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TU352.12

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