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通化城市展览馆的主体钢结构部分呈碗形,整体结构呈现出比较强的空间受力特征。在分析整体结构受力特征的基础上讨论了如下几个问题:环梁的拉弯稳定计算,按规范中纯弯曲构件稳定公式计算大偏心受拉构件的稳定问题,结果偏于保守;分析铰接柱脚内力特征,对比了销轴节点的适用条件,采用了分别承受水平力和竖向力的柱脚形式,该节点构造简单、传力可靠;由于放射形钢梁周边不均匀布置造成的应力集中,采用有限元方法对屋面复杂放射梁交汇节点进行应力分析,并给出应力规律图。
Tonghua City Hall main part of the steel structure was bowl-shaped, the overall structure showed a strong spatial characteristics of the force. The following problems are discussed on the basis of the analysis of the force characteristics of the whole structure: The stability calculation of the tension and bending of the ring beam, the stability of the large eccentric tension member calculated according to the stability formula of the pure bending member, the result is conservative; Compared with the applicable conditions of the pin joints, the column foot with the horizontal force and the vertical force is adopted. The node is simple in structure and reliable in force transmission. Due to the uneven stress caused by the uneven arrangement of the radial beam, Focusing on the finite element method, the stress analysis of the complex joints of roof beams is carried out, and the stress law is given.