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石家庄国际会展中心中央大厅东西向沿轴线长约800m,属超长结构。采用大质量法对其进行了地震作用的多向、多点、多维输入分析研究,主要考察行波效应对整体结构反应的影响,以及对地上钢结构树形柱和Y形柱、框架柱与折板网架间的撑杆以及折板网架间的空间倒三角联系桁架杆件内力的影响。分析结果表明,地震动多点输入明显降低了地上整体钢结构的基底剪力反应,增大了各段钢结构的扭转反应。除折板网架外,地上钢结构的轴力及剪力平均超载比为1.2,弯矩的平均超载比为1.1～1.2。1段联系桁架的轴力、Y向弯矩和Y向剪力以及3段框架柱与网架间撑杆的双向剪力的平均超载比为1.3～1.4。
Shijiazhuang International Convention and Exhibition Center, the central hall from east to west along the axis of about 800m, is a long structure. The multi-directional, multi-dimensional and multidimensional input analysis of the seismic effect is carried out by using the mass method. The impact of the traveling wave effect on the overall structural response is mainly investigated, as well as the effects of the tree-shaped steel columns and the Y- The effect of the internal force of truss members in the triangle between the folded plate truss and the space between the folded plate truss. The analysis results show that the multi-point input of ground motions can significantly reduce the base shear response of the whole steel structure on the ground and increase the torsional response of each section of steel structure. In addition to the folding grid, the average overloading ratio of axial force and shear of the above ground steel structure is 1.2, and the average overload ratio of bending moment is 1.1 ~ 1.2.1 The axial force of the truss in connection with the Y direction, the Y-direction bending moment and the Y- And the average overload ratio of bi-directional shear force between the three-section frame column and the truss strut is 1.3-1.4.