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温室结构设计中雪荷载取值方法的初探 总被引:3,自引:0,他引:3
在分析比较国外关于温室建筑及我国工业与民用建筑结构荷载规范的基础上 ,针对温室结构设计中雪荷载的定义方法、计算取值等进行了较深入的探讨 ;同时结合工程实践 ,提出了一套适合我国温室结构设计中雪荷载取值的一般原则 :在现有条件下 ,考虑重要性因子、暴露因子和热因子 ,按中国建筑结构荷载规范 (GB5 0 0 0 9- 2 0 0 1)计算雪荷载是可行的 相似文献
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深入介绍了幕墙结构的安全保证,并进行了幕墙结构的风荷载取值分析.建筑幕墙的风荷载取值,应考虑地面粗糙度按阵风荷载计算取值,而不应规定最小值.可以借鉴高层建筑对风荷载的处理方法,设计幕墙结构承载能力并进行变形计算,但应考虑加强幕墙构件的节点连接,即节点连接设计时考虑反力增大系数,从而达到既安全又经济的双重效果. 相似文献
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通过对大型车辆荷载不同取值方法进行结构内力分析比较,提出了对于板、梁、柱设计时大型车辆荷载的取值分别采用不同方法。 相似文献
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分析了由于《建筑地基基础设计规范》以及《建筑结构荷载规范》的修订,荷载取值的变化,在采用荷载设计值进行复合地基设计是所产生的问题,并提出了相应的改进意见。 相似文献
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In recent years plastic film has been extensively used for cladding low cost greenhouses. A limitation of the material is its susceptibility to wind storm damage and its wider use is dependent on good design through a knowledge of wind loads.Results of a limited programme of measurements of wind pressure on a film clad inflated roof greenhouse are presented. The measurements were made on the full-scale structure under natural wind conditions. The shape of the roof was modified by the wind and has been calculated for the measured wind load pattern assuming inviscid uniform flow. The application of these results to design is discussed. 相似文献
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介绍了荷载的概念及荷载值的分类,分析了建筑物结构设计中荷载取值的作用与重要性,通过对各种建筑设计时选用的不同荷载值进行分析,探讨了建筑物结构中荷载值的确定方法,以提高建筑结构设计水平。 相似文献
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介绍了我国现行结构设计标准中采用的设计方法存在的不足和国际标准中提出的工程结构可靠度"设计值法"的基本思想。根据我国荷载、抗力的统计结果及设计值法的荷载、抗力设计值的取值原则,考虑活荷载与恒荷载的比值对结构可靠度的影响,对不同类型构件在轴心受压条件下的可靠度进行系统的分析。分析表明:"设计值法"隐含的可靠度水平较我国的设计方法明显偏低,无法直接用于我国结构设计。依据我国结构设计的目标可靠指标对其进行修正,初步建立适用于我国结构设计的荷载、抗力设计值法取值参数。 相似文献
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This study was carried out to determine the structural and functional characteristics of the greenhouses in greenhouse enterprises of Turkey. Greenhouse enterprises are widely common along the Marmara, Aegean and Mediterranean cost lines. Marmara region was selected as the study area since it is the pioneering region and has large areas allocated to greenhouses, and has various greenhouse types. Information about greenhouse types, material properties, placement, and arrangement of greenhouses in the study area was gathered by a questionnaire; then greenhouses in enterprises were divided into groups based on cover material, load bearing materials and directional placement. A total of four types of greenhouse with the most economic cross-section, one from each group, were selected and load acting on structural members of greenhouses were calculated. Loads acting on beams of each greenhouse were analysed by Force Method and Moment Distribution Method. The results obtained were compared statistically to determine the best methodology for structural analysis of greenhouses. As a result, no statistical difference was found between moments and shear forces obtained from both methods. However, a difference occurred based on greenhouse types and it was determined that the values obtained for trussed block greenhouse were higher than the other ones. 相似文献
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城市轻轨站桥合一结构设计中的几个问题 总被引:2,自引:0,他引:2
结合天津津滨轻轨车站结构设计 ,介绍了城市轻轨高架车站结构选型、荷载取值、荷载组合、结构计算、构件设计、基础设计等方面的情况 ;比较了铁路桥梁规范与一般建筑结构设计规范在荷载组合、构件设计等方面的区别 ;分析了温度变化、基础差异沉降对结构内力的影响 ;提出了相关的设计建议 相似文献
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本文介绍了多层大跨度停车库的结构方案及其特点、荷载的取值,预应力的设计要点。简要介绍了预应力结构的计算方法和步骤,以及所采取的构造措施,总结了采用预应力结构的车库设计中的优点。 相似文献
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大跨度索穹顶结构模型静力试验研究 总被引:1,自引:0,他引:1
以内蒙古伊旗全民健身体育中心工程为研究对象,设计制作了1∶10缩尺肋环型索穹顶结构试验模型,研究了模型结构张拉成形后在设计荷载作用下的力学性能,将ANSYS数值模拟加载和模型加载结果进行了对比分析,获得了模型静力响应的变化规律及活荷载不对称分布对结构整体静力性能的影响。研究表明:索穹顶结构在外荷载作用下,脊索存在应力减小的现象;结构可随荷载的变化不断调整预应力的分布状态;作为柔性空间体系,对非对称荷载作用十分敏感;结构在设计荷载作用下, 结构构件均处于安全的工作范围内;数值模拟结果与试验值吻合较好,验证了数值模拟的正确性和结构设计的合理性。 相似文献