摘要
为了探明偏心受压及顺桥方向低周往复荷载作用下圆形钢管墩的力学性能,设计了4个偏心受压的圆形截面钢管柱试件进行试验与有限元分析(finite element analysis,FEA)。通过对比试验及FEA得到的试件水平力-水平位移滞回曲线及破坏现象可知,FEA与试验结果吻合较好,验证了FEA模型的有效性。结果表明:试件根部局部失稳变形区域内的应力分布均超过了钢材的屈服应力;当竖向偏心荷载保持恒定时,钢管柱横桥向水平变形随着顺桥方向水平变形的增加而增加,试件破坏时钢管根部的局部失稳变形具有明显的扭剪变形特征;轴压比(P/Py)对试件的初期刚度和最大承载力影响较小,但当桥墩的轴压比较大时,其承载力较低。
The mechanical properties of the steel tubular column under eccentric compression and cyclic loading in the longitudinal direction of the bridge were investigated through the eccentrically compressed test and finite element analysis(FEA)of four circular steel tubular column specimens.By comparing the horizontal force-horizontal displacement hysteresis curve and damage phenomenon of the specimens and the FEA results,it is found that the FEA results were verified and in good agreement with the test ones.The stress in the area of local instability deformation at the root of the specimen exceeds the yield stress of the steel material.When the vertical eccentric load keep constant,the horizontal deformation along transverse direction of the steel tubular column increased with the increase of horizontal deformation of the steel tubular column in longitudinal direction.When the specimen was destroyed,local torsional shear deformation instability deformation was observed at the root of the specimen.The axial compression ratio P/Py had little influence on the initial stiffness and the loading-carrying capacity of specimen.However,the loading-carrying capacity declined with the P/Py increasing.
作者
孙庚华
SUN Genghua(China Railway 11th Bureau Group Third Engineering Co. , Ltd. , Shiyan, Hubei 442012, China)
出处
《中国科技论文》
CAS
北大核心
2021年第8期812-817,共6页
China Sciencepaper
关键词
钢管柱
偏心受压
顺桥方向
拟静力力学性能
试验
有限元分析
steel tubular column
eccentric compression
longitudinal direction
pseudo-static mechanical property
test
finite element analysis(FEA)
