Co-rotational finite element analysis for second-order effects of high rise plane frame structures
Although methods for the second-order effects of plane frames were developed in the 1980s,much of this early work was surprisingly sophisticated or not very efficient and,hence worth re-visiting.Starting from geometric deformational and physical relations of the plane beam,this work has successfully applied co-rotational procedure to derive non-linear tangential stiffness matrix of plane beam element in large but small-strained rotational displacement on basis of field consistency.A non-linear finite element iteration procedure is thus established by the Newton-Raphson technique,and a corresponding Fortran program NPFSAP has been completed.Numerical results of high accuracy for the second-order effects of tall building frame structures are thus obtained.Computations indicate that tall building frames are surprisingly sensitive to second-order effects and that these effects are irrelevant to the lateral building loads but became more significant with the decrease of building stiffness,and increase of vertical loading and building storey.Furthermore,an estimation formula of second-order effects for middle column of frame building is presented for engineering designers to accurately calculate the frame moments.
Tall building Frame structure Second-order effects Co-rotational procedure Finite element method
Songbai Cai Pusheng Shen Changwan Kim
College of Resource and Environment Science,Hunan Normal University,Changsha 410081,China College of Civil Engineering,Hunan University,Changsha,410082,China Department of Mechanical Engineering,School of Engineering,Konkuk University,Seoul,143-701,South Kor
国际会议
成都
英文
361-366
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）