摘要
利用二次多项式位移函数导出了一个桁架结构的三节点截面桁段单元 ,提出了桁梁空间计算的三节点截面桁段有限元法 ,该方法适当地考虑了主桁弦杆节点刚性 ,桥面系横梁局部弯曲 ,斜桥门架及横联横梁局部弯曲的影响 .算例表明 ,计算结果可靠、自由度较少 。
By use of the displacement function of quadratic polynomial,the three nodal section truss segment element is formulated,and the three nodal section truss segment finite element of spatial calculation for truss girder strcture is proposed.The effects of main truss chord nodal stiffness,the cross beam local bending on bridge floor system and portal frame or portal bracing are taken into rational consideration in the approach.The numerical example illustrates that the calculation results are reliable and this method has less degress of freedom,especially for the spatial computation of the large span truss girder bridge.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第6期92-96,100,共6页
Journal of Hunan University:Natural Sciences
