Advanced design for trusses of steel and concrete-filled tubular sections
Advanced design for trusses of steel and concrete-filled tubular sections
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DOI：
10.1016/j.engstruct.2011.08.002
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发表时间：
2011-12
影响因子：
5.5
通讯作者：
M. Fong;Siu-Lai Chan;B. Uy
中科院分区：
文献类型：
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作者：
M. Fong;Siu-Lai Chan;B. Uy
本文对作为柱和桁架构件的裸钢管和钢管混凝土(CFS)的屈曲性能进行了试验和分析研究。比较了钢管和CFS管组成的柱和桁架的构件抗力，并用欧洲规范3(EC3)、欧洲规范4(EC4)、COPHK、AISC-LRFD和AS5100等国际标准中的传统有效长度和二阶分析设计方法预测了填充混凝土的抗力。试验结果被进一步用来验证所提出的二阶分析，它跳过了有效长度的假设，以便准确可靠地设计组合构件。目前将组合杆件视为桁架构件的整体方法是对结构作为一个系统进行测试和设计的一项原创性工作，而不是在传统的基于杆件的设计中孤立地设计杆件。
This paper presents an experimental and analytical investigation of buckling behavior of bare steel and concrete-filled steel (CFS) tubes used as columns and as members of trusses. The member resistances of the columns and trusses consisting of steel and CFS tubular members are compared to demonstrate the beneficial effects of the in-filled concrete, with their resistances predicted using the conventional effective length and second-order analysis methods of design in various international standards such as Eurocode 3 (EC3), Eurocode 4 (EC4), CoPHK, AISC-LRFD and AS5100. Test results are further used to validate the proposed second-order analysis, which skips the assumption of effective length, for accurate and reliable design of composite members. The present holistic approach of considering composite members as constituting elements in a truss represents a piece of original work on testing and design of structures as a system, rather than designing members in isolation in the traditional member-based design.