中性盐雾环境锈蚀H型钢柱抗震性能试验研究
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摘要
通过7根锈蚀H型钢柱的低周往复荷载试验,研究锈蚀对H型钢柱破坏形态、承载力、变形、延性、耗能等方面的影响。结果表明:锈蚀钢柱的翼缘和腹板变形范围及屈曲中心高度呈减小趋势,部分钢柱屈曲中心高度降低了约30%;随着质量损失率增加,滞回环梭型饱满程度越低,所包围的面积越来越小;钢柱的承载力下降明显;钢柱位移延性系数及累积滞回耗能不断减小,并基于试验数据建立了锈蚀H型钢柱位移延性系数的退化模型及累积滞回耗能与循环次数的关系。锈蚀导致钢柱截面面积减小,同时点蚀的存在引起应力集中,减弱了其塑性变形能力。反复荷载作用下,钢柱塑性变形累积,局部屈曲导致承载力下降,抗震性能降低。
The effects of corrosion on the failure mode, bearing capacity, deformation, ductility and energy consumption of H-shaped steel columns were studied by low cycle reversed load tests of seven corroded H-shaped steel columns. The results show that the flange and web deformation range and buckling center of the corroded specimens decrease and for some of the specimens the buckling center are reduced by 30%. With the increase of mass loss rate, the degree of fullness of hysteresis loops becomes increasingly smaller. The bearing capacity of the specimen decreases obviously. The displacement ductility coefficient and cumulative hysteretic energy consumption decrease continuously. Based on the experimental data, the degradation model of displacement ductility coefficient of corroded H-shaped steel columns and the relationship between cumulative hysteretic energy consumption and number of cycles are established. The corrosion results in the reduction of the cross-section area of the specimens, and the pitting corrosion leads to stress concentration which consequently weakens the plastic deformation ability. Under repeated loading, the plastic deformation accumulates, and the buckling deformation leads to the decrease of bearing capacity and seismic performance.
The effects of corrosion on the failure mode, bearing capacity, deformation, ductility and energy consumption of H-shaped steel columns were studied by low cycle reversed load tests of seven corroded H-shaped steel columns. The results show that the flange and web deformation range and buckling center of the corroded specimens decrease and for some of the specimens the buckling center are reduced by 30%. With the increase of mass loss rate, the degree of fullness of hysteresis loops becomes increasingly smaller. The bearing capacity of the specimen decreases obviously. The displacement ductility coefficient and cumulative hysteretic energy consumption decrease continuously. Based on the experimental data, the degradation model of displacement ductility coefficient of corroded H-shaped steel columns and the relationship between cumulative hysteretic energy consumption and number of cycles are established. The corrosion results in the reduction of the cross-section area of the specimens, and the pitting corrosion leads to stress concentration which consequently weakens the plastic deformation ability. Under repeated loading, the plastic deformation accumulates, and the buckling deformation leads to the decrease of bearing capacity and seismic performance.
引文
[1] 钢结构设计规范:GB 50017—2003[S].北京:中国计划出版社, 2003:43- 44. (Code for design of steel structures:GB 50017—2003[S]. Beijing: China Planning Press, 2003:43- 44. (in Chinese))
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[14] 吴健, 邵永健, 薛建阳,等. SRC-RC转换柱抗震性能的试验研究[J]. 建筑技术, 2012,43(5):423- 427.(WU Jian, SHAO Yongjian, XUE Jianyang,et al. Experimental study on seismic behavior of SRC-RC transfer column[J]. Building Technology, 2012,43 (5): 423- 427. (in Chinese))
[15] 马辉. 型钢再生混凝土柱抗震性能及设计计算方法研究[D]. 西安:西安建筑科技大学,2013. (MA Hui. Seismic performance and design calculation method of steel reinforced recycled concrete columns[D]. Xi’an: Xi’an University of Architecture and Technology, 2013. (in Chinese))
[16] 李俊华,王新堂, 薛建阳, 等.低周反复荷载下型钢高强混凝土柱受力性能试验研究[J]. 土木工程学报, 2007,40(7):11-18. (LI Junhua, WANG Xintang, XUE Jianyang, et al. Experimental study on stress performance of high strength concrete columns under low cycle cyclic loading[J]. China Civil Engineering Journal, 2007,40 (7): 11-18. (in Chinese))
[17] 建筑抗震试验规程:JGJ/T 101—2015[S].北京:中国建筑工业出版社,2015. (Code for seismic test of buildings:JGJ/T 101—2015[S]. Beijing: China Architecture & Building Press, 2015. (in Chinese))
[2] 工业建筑防腐蚀设计规范:GB 50046—2008[S].北京:中国计划出版社,2008:59- 60.(Code for anticorrosion design of industrial buildings:GB 50046—2008[S]. Beijing: China Planning Press, 2008:59- 60. (in Chinese))
[3] 李森林, 范卫国, 蔡旭东. 对上海石化原油码头腐蚀状况的调查[J]. 水运工程, 2004(4):48-51. (LI Senlin, FAN Weiguo, CAI Xudong. Investigation on corrosion status of Shanghai Petrochemical crude oil terminal[J]. Water Transport Engineering, 2004 (4): 48-51. (in Chinese))
[4] 邱斌, 徐善华. 锈蚀钢板力学性能的退化规律[J]. 机械工程材料, 2014,38(10):60- 63.(QIU Bin, XU Shanhua. Degradation law of mechanical properties of corroded steel sheet[J]. Mechanical Engineering Materials, 2014,38 (10): 60- 63.(in Chinese))
[5] BURKE S, BRUNEAU M. Effect of surface roughness on cyclic ductility of corroded steel[J]. Journal of Structural Engineering, 2016, 142(6):04016014.
[6] CáNOVAS F, ESCAMILLA C, FERNáNDEZ M. Ductility of reinforcing steel with different degrees of corrosion and the ‘equivalent steel’ criterion[J]. Materiales De Construction, 2007, 57(286):653- 659.
[7] 史炜洲, 童乐为, 陈以一,等. 锈蚀对钢材和钢梁受力性能影响的试验研究[J].建筑结构学报, 2012,33(7):53- 60.(SHI Weizhou, TONG Lewei, CHEN Yiyi, et al. Experimental study on the effect of corrosion on the mechanical properties of steel and steel beams[J]. Journal of Building Structures, 2012,33 (7): 53- 60. (in Chinese))
[8] NAKAI T, MATSUSHITA H, NORIO Y, et al. Effect of pitting corrosion on local strength of hold frames of bulk carriers (1st report)[J]. Marine Structures, 2004, 17(5): 403- 432.
[9] NAKAI T, MATSUSHITA H, NORIO Y. Effect of pitting corrosion on strength of web plates subjected to patch loading[J]. Thin-Walled Structures, 2006, 44(1): 10-19.
[10] 人造气氛锈蚀试验: 盐雾试验:GB/T 10125—2012[S]. 北京:中国标准出版社,2012. (Artificial atmosphere corrosion test-salt spray test:GB/T 10125—2012[S]. Beijing: Standards Press of China, 2012. (in Chinese))
[11] 金属和合金的锈蚀户外周期喷淋暴露试验方法:GB/T 24517—2009[S]. 北京:中国标准出版社, 2009.(Corrosion of metals and alloys outdoor periodic spray exposure test method:GB/T 24517—2009[S]. Beijing: Standards Press of China, 2009. (in Chinese))
[12] 金属材料拉伸试验:第1部分:室温试验方法:GB/T 228.1—2010[S]. 北京:中国标准出版社, 2010.(Metallic materials:tensile test:part 1: method of test at room temperature:GB/T 228.1—2010[S]. Beijing: Standards Press of China, 2010.(in Chinese))
[13] 王秋维, 史庆轩, 姜维山,等. 新型截面型钢混凝土柱抗震性能试验研究[J]. 建筑结构学报,2013,34(11):123-129.(WANG Qiuwei, SHI Qingxuan, JIANG Weishan, et al. Experimental study on seismic behavior of new section steel reinforced concrete columns[J]. Journal of Building Structures, 2013,34 (11): 123-129. (in Chinese))
[14] 吴健, 邵永健, 薛建阳,等. SRC-RC转换柱抗震性能的试验研究[J]. 建筑技术, 2012,43(5):423- 427.(WU Jian, SHAO Yongjian, XUE Jianyang,et al. Experimental study on seismic behavior of SRC-RC transfer column[J]. Building Technology, 2012,43 (5): 423- 427. (in Chinese))
[15] 马辉. 型钢再生混凝土柱抗震性能及设计计算方法研究[D]. 西安:西安建筑科技大学,2013. (MA Hui. Seismic performance and design calculation method of steel reinforced recycled concrete columns[D]. Xi’an: Xi’an University of Architecture and Technology, 2013. (in Chinese))
[16] 李俊华,王新堂, 薛建阳, 等.低周反复荷载下型钢高强混凝土柱受力性能试验研究[J]. 土木工程学报, 2007,40(7):11-18. (LI Junhua, WANG Xintang, XUE Jianyang, et al. Experimental study on stress performance of high strength concrete columns under low cycle cyclic loading[J]. China Civil Engineering Journal, 2007,40 (7): 11-18. (in Chinese))
[17] 建筑抗震试验规程:JGJ/T 101—2015[S].北京:中国建筑工业出版社,2015. (Code for seismic test of buildings:JGJ/T 101—2015[S]. Beijing: China Architecture & Building Press, 2015. (in Chinese))