方钢管柱恢复力特性的数值模拟分析
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摘要
钢柱脚的设计在钢结构设计中起着非常重要的作用,通过大型分析软件ANSYS对钢管柱脚进行了非线性有限元数值模拟分析,得出钢管柱在不同壁厚、不同轴压比下的断裂性能和恢复力特性以及两者之间的关系,结果表明:(1)钢管柱最容易开裂的部位位于柱底部;(2)随着壁厚的逐渐增加,钢管柱抗开裂能力逐渐增强;(3)轴压比对钢管柱断裂的影响相对很小,但对开裂后构件的耗能性能影响较大;(4)随着抗断裂能力的提高,构件的抗震性能提高明显。
The design of steel column base plays a very important role in steel structure design.Through large-scale analysis software ANSYS,this paper analyzed the steel column base by finite element numerical simulation nonlinear analysis,and discussed the fracture behavior and restoring force characteristics of steel pipe column in different thickness and axial compression ratio,and the link between the two.The results show that:(1) The section of most likely break focus on the bottom of vertical load plane in the middle of the steel column base;(2) With the increase of thickness,anti-cracking ability gradually increased;(3) Axial compression ratio of the specimen has little effect for anti-cracking ability;(4) With the increase of anti-cracking ability,the seismic behavior of specimens gets heightened.
The design of steel column base plays a very important role in steel structure design.Through large-scale analysis software ANSYS,this paper analyzed the steel column base by finite element numerical simulation nonlinear analysis,and discussed the fracture behavior and restoring force characteristics of steel pipe column in different thickness and axial compression ratio,and the link between the two.The results show that:(1) The section of most likely break focus on the bottom of vertical load plane in the middle of the steel column base;(2) With the increase of thickness,anti-cracking ability gradually increased;(3) Axial compression ratio of the specimen has little effect for anti-cracking ability;(4) With the increase of anti-cracking ability,the seismic behavior of specimens gets heightened.
引文
[1]NAKASHIMA M,INOUE K,TADA M.Classificationof damage to steel buildings observed in the 1995Hyogoken-Nanbu Earthquake[J].Engineering Struc-tures,1998,20(4-6):271-281.
[2]姚国春,霍立兴,张玉风,等.焊接钢结构梁柱节点地震下的断裂行为研究[J].钢结构,2000,15(50):25-27.
[3]赵人伟,石永久.钢结构节点脆性破坏分析[J].工程力学,1999(,5):32-37.
[4]HANCOCK J W,MACKENZIE A C.On the mecha-nisms of ductile fal1ure in high-strength steels subjectedto multi-axial stress-states[J].Journal Mech.Phys.[J].Solids,1976,24:147-169.
[5]王万祯,顾强,孙玉萍.延性金属在应力三轴空间的裂纹形成准则[J].建筑结构,2007,37(6):71-73.
[2]姚国春,霍立兴,张玉风,等.焊接钢结构梁柱节点地震下的断裂行为研究[J].钢结构,2000,15(50):25-27.
[3]赵人伟,石永久.钢结构节点脆性破坏分析[J].工程力学,1999(,5):32-37.
[4]HANCOCK J W,MACKENZIE A C.On the mecha-nisms of ductile fal1ure in high-strength steels subjectedto multi-axial stress-states[J].Journal Mech.Phys.[J].Solids,1976,24:147-169.
[5]王万祯,顾强,孙玉萍.延性金属在应力三轴空间的裂纹形成准则[J].建筑结构,2007,37(6):71-73.
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