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平面不规则空间钢网格盒式成束筒结构抗震性能研究

ISSN号：1006-6578
期刊名称：《空间结构》
时间：0
分类：TU973[建筑科学—结构工程]
作者机构：[1]贵州省交通规划勘察设计研究院股份有限公司,贵州贵阳550081, [2]贵州大学空间结构研究中心,贵州贵阳550003
相关基金：贵州大学研究生创新基金资助（校研理工2015025）

作者：杨志勇[1], 马克俭[2], 申波[2], 孙敬明[2], 刘卓群[2]

关键词：盒式结构, 抗震性能, 静力弹塑性分析, 抗侧刚度, 推覆极限荷载, cassette structure, seismic behavior, pushover analysis, lateral stiffness, pushover ultimate load

中文摘要：

为研究平面不规则空间钢网格盒式成束筒结构的抗震性能,采用MIDAS有限元软件建立数值模型,进行结构静力弹塑性分析.从结构塑性发展过程及其构件屈服的顺序,得出结构的屈服路径;根据结构内外筒剪力重分布特点,明确内外筒剪力的分配规律;从内外筒抗侧刚度的发展过程,寻求结构刚度退化的主要原因.分析连梁高度、外围钢网格柱截面、墙肢厚度等因素对结构的屈服路径、剪力分配规律、刚度退化的影响.分析结果表明：对于结构整体刚度和推覆极限荷载的影响程度为连梁高度较小,外围钢网格柱与墙肢厚度较大,墙肢厚度的影响略大于外围钢网格柱.

英文摘要：

In order to study the seismic behavior of space steel grid cassette bundled tube structures with irregular plane,numerical model was built to carry out pushover analysis by using MIDAS software.From the structural plastic development process and the yield order of the members,the yield path of the structure is obtained.For this structure,the shear force distribution of internal and external tubes is defined,and the main reason for the degradation of structural stiffness is obtained from the development process of lateral stiffness.In addition,the effects of the beam height,the section of outer steel grid column,the wall thickness and other factors on the yield path,shear force distribution and stiffness degradation are analyzed.The results show that the beam height has minor effect on the overall stiffness of the structure and pushover ultimate load,while the effect of outer steel grid column and wall thickness turns to be larger,and the effect of wall thickness is slightly larger than that of the outer steel grid column.