轻钢桁架柱轴压性能试验研究
建筑与结构设计
Experimental Researchon Static Behavior of Lightweight Steel Truss Columns under Axial
peon
李红超，王建军，熊晨
(中国建筑技术集团有限公司，北京100013) LI Hong-chao,WANG Jian-jun, XIONGChen
(China Building Technique Group Co.Ltd,Beijing 100013, China)
【摘要】通过10根轻钢架粒的轴压试验，研究了不同长细比和扣板间距等参数对轻钢静架粒轴压承载受力性能的影响，结果表明：在轴向压力作用下，轻钢静架粒主要发生弯曲层曲破环，且在没有任何例侧向约来条件下双管柱不适于承受整向荷载；轻钢剂
可视为缓板式格构柱，双管柱按照实腹式轴心压杆的方法计算承载力，四管柱采用换算长细比的方法计算其绕虚轴弯曲届破坏的权展承载力，
[Abstract )Ten truss columns of lightweight steel are tested under axial compression loads. The influences of different slenderness ratio and spacing ofbatten plate on the static mechanics behaviorofcolumns oflightweight steel are investigated. Itis indicated truss columns oflightweight steel mainly occur bend buckling destruction under the axial pressure and battened steel column is not suitable for vertical load without any lateral restraint; The bearing capacity of truss columns of lightweight steel observably decreases with increasing slenderness ratio; Spacing ofbatten plate has no obvious influences on the bearing capacity oftruss columns oflightweight steel, and according with the requirement ofpoints limb slendermess ratio; Truss column light steel can be regarded as batten plate lattice column, Battened steel column can be according to method of the solid-web axial compressive bar to calculate bearing capacity. Limbs column can be according to method of conversion slenderness ratio to
calculate the ultimatebearingcapacityaroundthe imaginaryaxisbendingbucklingfailure.【关键词】轻钢将架柱；长细比；承载力；局部届曲
[Keywords Jightweight steeltrusscolumns;slendermess ratio;bearingcapacity,local buckling
【中图分类号】TU392.5
【文献标志码]A
[DO10.13616/j.cnki.gcjsysj.2014.08.001 1引言
轻钢轻混凝土结构是由中国建筑技术集团有限公司自主开发的，以薄壁轻钢和轻混凝土为主要材料，集成聚苯免拆模板混凝土楼盖、外墙模板装饰一体化等新技术，充分发挥轻钢【基金项目】国家科技支撑计划项目(2012BAJ10B04)
【作者简介】李红超（1983~），男，刘北南宫人，工程师，从事低碳建筑、钢结构以及结构工程检测与加固研究，（电子信箱)Ihch
2008@163.com。万方数据
【文章编号】1007-9467(2014)09-0025-04
结构工业化程度高和现浇混凝土结构整体性好等优点，采用工厂生产与现场浇筑相结合的一种新型结构体系。轻钢桁架柱作为这种结构体系中轻钢构架的组成部分，承担着全部施工荷载以及活荷裁。因此，为保证施工阶段的安全，有必要对该桁架柱的受力性能及破坏机理做深入研究。
本文通过10根轻钢桁架柱的轴压试验，研究了不同长细比和扣板间距等参数对轻钢桁架柱轴压承载受力性能的影响，为施工阶段轻钢构架承载力计算和稳定性验算提供依据。
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