某内穿式拱-桁架结构设计及其连续倒塌分析
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朱哲达1，舒赣平1，金如元2，赵伟2，米金星2（1 东南大学土木工程学院， 南京 210096； 2 江苏省建筑设计研究院有限公司， 南京 210096）［摘要］利用拱竖向刚度大的特点，可有效减小与其协同工作的桁架的高度。以南京青奥体育场馆为工程背景，研究了内穿式拱-桁架协同工作的机理与设计方法。对此结构体系的受力性能进行分析，并分析其稳定性；对拱与桁架相连节点进行有限元分析，以确保关键节点具有足够的承载力；使用抽柱法进行结构抗连续倒塌计算，以分析结构关键构件。基于上述结果，给出了此类结构的设计建议。［关键词］内穿式拱-桁架结构; 结构布置; 受力性能; 节点分析; 连续倒塌分析中图分类号：TU393.3 文献标识码：A 文章编号：1002-848X(2013)19-0042-06Structural design and progressive collapse analysis on an internal-break arch-truss structureZhu Zheda1, Shu Ganping1, Jin Ruyuan2, Zhao Wei2, Mi Jinxing2(1 School of Civil Engineering, Southeast University, Nanjing 210096, China; 2 Jiangsu Province Architectural D & R Institute Co., Ltd., Nanjing 210096, China)Abstract: Take the advantage of the high vertical stiffness of the arch, the height of the truss which cooperative works with the arch can be effectively reduced. The cooperative work mechanism and design method of the internal-break arch-truss structure were discussed in the engineering background of Nanjing Olympic Sports Venues. Stress performance and stability of the structure were analyzed. Finite element analysis was taken on the connections of arch and truss to guarantee enough load-bearing capacity of key connections. Column-pumping method was introduced in anti-progressive collapse of the structure to analyze vital members. Based on the above analysis results, advises on this type of structures are given.Keywords: internal-break arch-truss structure; structural arrangement; mechanical behavior; nodal analysis; progressive collapse analysis作者简介：朱哲达，硕士研究生，Email：megatronzzd@gmail.com。参考文献［1］GB 50017—2003钢结构设计规范［S］. 北京：中国计划出版社，2003.［2］GB 50009—2012 建筑结构荷载规范［S］. 北京：中国建筑工业出版社，2012.［3］GB 50011—2010 建筑抗震设计规范［S］. 北京：中国建筑工业出版社，2010.［4］CECS 160∶2004 建筑工程抗震性态设计通则［S］. 北京：中国计划出版社，2004.［5］JGJ 7—2010 空间网格结构技术规程［S］. 北京：中国建筑工业出版社，2010.［6］U.S. General Services Administration(GSA). Progressive collapse analysis and design guidelines for new federal office building and major modernization project［S］. Washington D.C., 2003.
