摘要
以范蠡大桥为背景，建立全桥杆系有限元模型和空间异形钢梁柱连接节点有限元模型，并对其进行对比分析研究。结果表明，塔柱承受着轴力和弯矩作用，塔柱内侧板件承担了60%-65%的竖向压力；横梁在连接节点附近受到横向弯曲和扭转作用；梁柱连接节点内板件应力分布不均匀，节点内侧应力水平较高，但高应力水平区域范围较小，应力扩散较快，结构受力安全。板壳有限元方法计算梁柱连接节点处结构应力比杆系有限元方法的精度高。
Based on the Fanli Bridge, the beam finite element model of the whole bridge and shell finite ele-ment of the pylon were constructed to analyze mechanical properties of the beam-column joint. The results show that the inner plates of pylon carry about 60% - 65% vertical pressures. Beams at the joint carry trans-versal bending and torsion. Stress distribution of plates in the beam-column joint is non-uniform. The inner plate stress is higher but the region of high level of stress is limited with fast stress dispersion. The structure is conservatively designed. Structural stress of the beam-column joint based on the finite element analysis by u-sing shell elements show higher accuracy than that by using the beam elements.
出处
《结构工程师》
北大核心
2014年第6期61-66,共6页
Structural Engineers
关键词
梁柱节点
力学性能
有限元分析
beam-column joint
mechanical property
finite element analysis
