论文部分内容阅读
在结构中构造被研究块体,针对其质心建立动力平衡方程;由考虑弯剪变形的杆端力与杆端位移之间关系式推导出段间内力计算公式;在时间域上交替运用动力平衡方程和段间内力计算公式进行递推计算,给出高耸结构、三维框架结构地震响应分析的波动方法。对于高耸结构,考虑了被研究块体质心与空间离散结点之间的偏心问题,给出了修正的动力学方程。利用框架结构地震响应分析的波动方法研究了短跨结构的行波效应问题。结果表明:采用传统方法计算给出的电视塔地震响应结果会偏小。考虑行波效应时,二维和三维框架结构柱子的剪力和梁端弯矩存在显著增大现象。
In the structure, the studied block is constructed and the dynamic balance equation is established for its center of mass. The formula for calculating the internal force between sections is derived from the relationship between the rod end force and the rod end displacement considering the bending shear deformation. The dynamic balance is alternately applied in the time domain Equations and formulas of internal force are recursively calculated, and the wave method of seismic response analysis of tall and three-dimensional frame structures is given. For towering structures, the eccentricity between the center of mass of the studied block and the discrete nodes in space is considered, and the modified kinetic equation is given. The problem of traveling wave effect of short-span structures is studied by the wave method of seismic response analysis of frame structure. The results show that the seismic response of TV tower given by traditional method will be small. Considering the traveling wave effect, there is a significant increase in the shear force and beam bending moment of two-dimensional and three-dimensional structural columns.