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钢-混凝土组合索塔压弯性能试验研究
曾耀, 吴冲, 周家兴
同济大学 桥梁工程系,上海 200092
摘要:
设计制作了2类共10个带开孔板连接件的钢-混凝土组合索塔模型试件,并进行轴压和恒定轴力下往复荷载试验。试验展示了不同真实轴压比下的2类试件承受往复荷载作用时的极限能力和破坏形态,结果表明:根据轴压比的不同,所有试件破坏形态清楚的分为受压破坏和受拉破坏2类,无轴力和过高的轴力都会明显降低构件在往复荷载下的力学性能;既作为连接件又作为加劲肋的开孔板能有效地限制受压试件钢板局部屈曲波长。最后,将试验结果与按照规范计算得到的轴力-弯矩关系进行比较。
关键词:  组合索塔  开孔板  往复荷载  局部屈曲  开裂  承载能力
DOI:10.11835/j.issn.1674-4764.2012.02.013
分类号:
基金项目:国家863计划项目(2007AA11Z105);国家科技支撑计划项目(2009BAG15B02);江西省交通科技项目(2010C0015)
Experimental Analysis on Beam-column Behavior of Steel-concrete Composite Pylon
ZENG Yao, WU Chong, ZHOU Jia-xing
Department of Bridge Engineering, Tongji University, Shanghai 200092, P. R. China
Abstract:
Ten specimens with perforated ribs, which can be divided into two series, were made to observe the behavior of steel-concrete composite pylon under axial load and cyclic load respectively. The experiment reveals the ultimate capacity and failure mode of two types of specimens under the cyclic load with different actual axial load level. Furthermore, it can be concluded from the results that the failure mode can be divided into two types, that is compression failure and tension failure. And the behavior of those specimens under cyclic load is influenced significantly under high axial load or without axial load at all. In addition, perforated ribs will prevent the plates under compression from overall buckling effectively based on the observation that the wavelength of plate is limited between two neighboring perforated ribs. At last, comparison on the interaction behaviors of the axial load (N) versus moment (M) is made between the results of experiment and calculation according to the criteria.
Key words:  composite pylon  perforated ribs  cyclic loads  local buckling  cracking  bearing capacity
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