斜向往复荷载作用下方钢管混凝土柱的抗震性能及损伤分析
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摘要
为研究斜向往复荷载作用下方钢管混凝土柱的抗震性能,以加载角度、轴压比及套箍系数为变量参数,对12个模型进行了有限元数值模拟。分析了各模型的滞回曲线、骨架曲线、延性系数、耗能能力等抗震指标,并利用Park-Ang模型进行了损伤指数计算。结果表明:随着加载角度的增加,构件滞回曲线的捏拢效应更为明显,承载能力及累积滞回耗能降低;当加载角度增加至45°时,累积滞回耗能降低约20%,极限承载能力降低约10%。损伤指数计算结果显示,加载角度对损伤指数影响不大,轴压比与套箍系数是影响结构抗震性能的核心因素。
In order to investigate the seismic behavior of concrete filled square steel tubular columns under inclined horizontal load,considering loading angle,axial compression ratio,and confinement index,12 designed models were analyzed by using FEM software. Hysteretic curves,skeleton curves,ductility coefficient and cumulative hysteretic energy of all models were investigated in detail.Meanwhile,the damage index was calculated by using Park-Ang model. Results show that loading angle has a certain influence on the hysteretic curves,the skeleton curves,and the energy dissipation capacities. The pinching effect of the hysteretic curves was more remarkable as the loading angle increased. Furthermore,the ultimate bearing capacity and energy dissipation capacity decreased as the loading angle increased. When loading angle reached 45°,cumulative hysteretic energy consumption was reduced by about 20% and the ultimate bearing capacity was reduced by close to 10%. The damage index calculated by Park-Ang model shows that loading angle has little impact on damage index. The axial compression ratio and confinement index are the main factors affecting the seismic performance of the columns.
In order to investigate the seismic behavior of concrete filled square steel tubular columns under inclined horizontal load,considering loading angle,axial compression ratio,and confinement index,12 designed models were analyzed by using FEM software. Hysteretic curves,skeleton curves,ductility coefficient and cumulative hysteretic energy of all models were investigated in detail.Meanwhile,the damage index was calculated by using Park-Ang model. Results show that loading angle has a certain influence on the hysteretic curves,the skeleton curves,and the energy dissipation capacities. The pinching effect of the hysteretic curves was more remarkable as the loading angle increased. Furthermore,the ultimate bearing capacity and energy dissipation capacity decreased as the loading angle increased. When loading angle reached 45°,cumulative hysteretic energy consumption was reduced by about 20% and the ultimate bearing capacity was reduced by close to 10%. The damage index calculated by Park-Ang model shows that loading angle has little impact on damage index. The axial compression ratio and confinement index are the main factors affecting the seismic performance of the columns.
引文
[1]韩林海.钢管混凝土结构-理论与实践[M].北京:科学出版社,2004.
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[4]吕西林,陆伟东.反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J].建筑结构学报,2000,21(2):2-11.
[5]徐培蓁,聂瑞锋,叶列平.方钢管混凝土柱塑性变形性能的试验研究[J].西安建筑科技大学学报(自然科学版),2011,43(5):609-614.
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[8]张建辉.方钢管混凝土框架柱的抗震性能分析[D].天津:天津大学,2004.
[9]董春敏,周淼.斜向往复水平荷载作用下矩形截面框架柱抗震性能[J].世界地震工程,2012,28(3):65-69.
[10]丁发兴,周林超,余志武,等.钢管混凝土轴压短柱非线性有限元分析[J].中国科技论文在线,2009,4(7):472-479.
[11]过镇海,张秀琴,张达成,等.混凝土应力-应变全曲线的试验研究[J].建筑结构学报,1982,(1):1-12.
[12]Park Y J,Ang A H S.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering,1985,111(4):722-739.
[13]Zhang S M,Guo L H,Ye Z L,et al.Behavior of steel tube and confined high strength concrete for concretefilled RHS tubes[J].Advances in Structural Engineering,2005,8(2):101-116.
[2]Sakino K.Hysteretic behavior of concrete filled square steel tubular beam-columns failed in flexure[J].Transactions of the Japan Concrete Institute,1981,3:439-446.
[3]Inai E,Mukai A,Kai M,et al.Behavior of concretefilled steel tube beam columns[J].Journal of Structural Engineering,2004,130(2):189-202.
[4]吕西林,陆伟东.反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J].建筑结构学报,2000,21(2):2-11.
[5]徐培蓁,聂瑞锋,叶列平.方钢管混凝土柱塑性变形性能的试验研究[J].西安建筑科技大学学报(自然科学版),2011,43(5):609-614.
[6]聂瑞锋,徐培蓁,阎宇.方钢管混凝土柱抗震性能试验研究和仿真分析[J].同济大学学报(自然科学版),2012,40(11):1596-1602.
[7]黄晓宇.方钢管混凝土柱抗震性能试验研究[D].天津:天津大学,2005.
[8]张建辉.方钢管混凝土框架柱的抗震性能分析[D].天津:天津大学,2004.
[9]董春敏,周淼.斜向往复水平荷载作用下矩形截面框架柱抗震性能[J].世界地震工程,2012,28(3):65-69.
[10]丁发兴,周林超,余志武,等.钢管混凝土轴压短柱非线性有限元分析[J].中国科技论文在线,2009,4(7):472-479.
[11]过镇海,张秀琴,张达成,等.混凝土应力-应变全曲线的试验研究[J].建筑结构学报,1982,(1):1-12.
[12]Park Y J,Ang A H S.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering,1985,111(4):722-739.
[13]Zhang S M,Guo L H,Ye Z L,et al.Behavior of steel tube and confined high strength concrete for concretefilled RHS tubes[J].Advances in Structural Engineering,2005,8(2):101-116.