基于子结构试验的高强角钢受力性能研究  

Substructure experimental study based on high strength angle steel mechanical behavior

作　　者：宁致远[1] 梅莎 党康宁[1] 陶磊[1] 刘云贺[1] 

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]三亚市住房和城乡建设局,海南三亚572000

出　　处：《西安理工大学学报》2014年第1期108-112,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(50921005/E0803)

摘　　要：以哈密北750kV特高压输电塔工程为依托,将Q420单根角钢设计在输电塔架的塔腿中进行破坏性静力试验研究。根据试验结果分析子结构中高强等边角钢的受力性能、极限承载力、失稳形式及变形幅值等指标,并与单根角钢试验结果进行对比。试验研究表明,子结构中的高强等边角钢失稳破坏形态为弯扭屈曲,变形集中在底跨跨中部分,支撑杆件对高强角钢起到了约束作用,降低了高强角钢的长细比,提高了子结构的承载力。Based on the 750 kV transmission tower in the north of Hami,the Q420 high-strength equal-leg angle steel is designed in the leg of the transmission tower.The failure static test of the substructures is conducted.According to the test results,mechanical behavior of the substructure,the ultimate bearing capacity,the buckling modes and deformation amplitude are investigated.The test results of the substructures are compared to the single angle steel.The test results indicate that flexural-tortional buckling has occurred in the high-strength equal-leg angle steel of the substructures and the deformation is concentrated in the middle part of the bottom of the truss.Support bars have had the constraint effect on the high-strength equal-leg angle steel,reducing the slenderness ratio and increasing the bearing capacity of the substructures.

关 键 词：高强角钢 输电塔架 承载力 子结构 

分 类 号：TU391[建筑科学—结构工程]