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厦门世侨中心结构设计中,外围结构采用结构与建筑幕墙合一的钢网格结构体系,与建筑外观效果贴合较好,并满足了项目对尽可能大的办公空间的需求。楼面水平构件对钢网格结构的约束较常规结构要弱,但仍能保证钢网格结构有足够的侧向支撑。为了精确定量地确定钢网格斜柱的合理计算长度,从而保证结构的稳定性,采用SAP2000软件对斜柱的屈曲模式进行了分析,并由欧拉公式反推其计算长度系数。分析表明,各柱计算长度系数在1.07以下,底层柱计算长度系数较小,上部楼层计算长度系数较大。最终结构设计采用了斜柱计算长度系数1.3,保证了一定的安全冗余度。
In the structural design of Xiamen Overseas Chinese Center, the steel grid structure system with the same structure and building curtain wall is adopted in the outer structure, which is in good conformity with the appearance of the building and meets the project’s demand for the largest possible office space. The restraint of the steel structure of the horizontal member of the floor is weaker than that of the conventional structure, but it still can ensure that the steel mesh structure has enough lateral support. In order to determine the reasonable calculation length of the inclined column of the steel grid accurately and quantitatively so as to ensure the stability of the structure, the buckling mode of the inclined column is analyzed by SAP2000 software and the calculated length coefficient is deduced by Euler’s formula. The analysis shows that the length coefficient of each column is less than 1.07, the length coefficient of bottom column is smaller and the length coefficient of upper floor is larger. The final structure design uses a slant column to calculate the length factor of 1.3 to ensure a certain degree of safety redundancy.