超大跨度凯威特型巨型网格结构选型及参数分析

发布时间：2018-03-13 08:40

本文选题：凯威特型巨型网格结构　切入点：超大跨度　出处：《建筑结构学报》2015年11期 　论文类型：期刊论文

【摘要】：通过对不同体系超大跨度空间结构研究成果的回顾,探讨了其发展趋势。对比分析了800 m跨度、相同荷载作用下具有相同几何参数的双层网壳、局部三层网壳、肋环型巨型网格和凯威特型巨型网格结构体系的多项静力性能指标。结果表明:在相同跨度和荷载作用下凯威特型巨型网格结构体系受力性能最优。针对此结构体系的空间复杂性,利用CAD三维成型分析获得其拓扑关系,明确了跨度、矢高、桁架高度等7个几何形体控制参数。基于结构几何成型的程序化实现方法,利用APDL参数化语言首次得到其自动生成程序,并编程完成了结构分析计算。最后对凯威特型巨型网格结构体系展开了包括环(径)向分割份数、矢跨比、桁架高跨比在内的7个参数共计153个模型、1 000余算例的大规模参数分析。总结了结构力学性能随上述参数的变化规律,归纳了各参数的合理取值范围,为该巨型结构的理论研究与工程设计提供参考。
[Abstract]:Based on the review of the research results of large span space structures with different systems, the development trend is discussed. The double layer latticed shells with 800 m span and the same geometric parameters under the same load are compared, and the local three layer latticed shells are analyzed. The static performance indexes of rib ring giant meshes and Cavette giant grid structure systems are obtained. The results show that the Kewett giant grid structure system has the best mechanical performance under the same span and load. The spatial complexity of the system, The topological relation is obtained by using CAD three-dimensional forming analysis, and seven geometric shape control parameters, such as span, vector height and truss height, are defined. The automatic generating program is obtained by using APDL parameterized language for the first time, and the structural analysis and calculation are accomplished by programming. Large scale parameter analysis of more than 1 000 examples of 153 models with 7 parameters including the ratio of height to span of truss is presented. The variation law of structural mechanical properties with the above parameters is summarized, and the reasonable value range of each parameter is summed up. It provides a reference for the theoretical research and engineering design of the giant structure.
【作者单位】：哈尔滨工业大学土木工程学院;哈尔滨工业大学结构工程灾变与控制教育部重点实验室;中国建筑西南设计研究院有限公司;
【基金】：中国博士后科学基金面上项目(551255) 中央高校基本科研业务费专项(HIT.NSRIF.2014098)
【分类号】：TU399

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