项目名称: 大型空冷火电厂钢桁架-混凝土管柱混合结构抗震性能试验研究
项目编号: No.51208422
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 建筑环境与结构工程学科
项目作者: 姚泽良
作者单位: 西安理工大学
项目金额: 25万元
中文摘要: 钢桁架-钢筋混凝土管柱结构是随着节水型空冷技术的出现而产生的一类新型混合结构,在我国富煤缺水地区有广阔的应用前景。该类结构的质量和刚度沿竖向分布严重不均匀,工程界对该类结构的动力灾变行为认识不足,我国目前也没有与之相应的设计规范。本项目拟选取典型的在役空冷结构,按1/8缩尺比建立试验模型,开展自由振动试验、水平反复荷载作用下的拟动力试验和低周反复位移作用下的拟静力试验,研究该类结构的振动模态、破坏形态、刚度退化、滞回特性、延性、变形性能和承载能力等动力行为。在试验基础上拟利用ANSYS程序对空冷结构进行弹塑性地震响应模拟分析,系统研究该类结构在动力灾变作用下的关键技术问题,揭示该类结构在强震作用下的灾变机理,提出该类结构的地震破坏准则、抗震设计指标以及抗震构造措施,补充和完善我国抗震规范相关条文。研究成果为空冷结构抗震设计和工程应用提供理论依据,具有重要的现实意义和应用价值。
中文关键词: 混合结构;试验模型;抗震试验;地震反应;动力分析
英文摘要: Steel truss and reinforced concrete tubular column structure belongs to a new type composite structure. It comes about at the appearance of water-efficient air cooled technology. It has wide application future in the area of China having rich coal and lacking water. This type structure stiffness and mass is highly non-uniform at vertical direction. There is a lack of understanding on this type structure dynamic catastrophe behavior in engineering field. There aren't any relevant codes for this type structure design in China until now. One typical air cooed structure on action service will be chosen in this project. One experimental model structure will be made by one eighth scale based on the chosen structure. The model free vibration experiment, pseudo-dynamic experiment under the action of horizontal repeated loading and pseudo static experiment under the action of low reversed cyclic displacement will be done. The structural dynamic behaviors, such as vibration mode, failure pattern, rigidity degeneration, hysteresis curve, ductility, deformation behavior and bearing capacity, will be studied. According to the experimental results, elastoplastic seismic response analysis on air cooled structure will be simulated with finite element analysis software ANSYS. Key technology problems on this type structure under
英文关键词: Hybrid building;Experimental model;Seismic tests;Seismic effects;Dynamic analysis