【摘要】 基于一般有限元理论 ,考虑连续质量惯性力的影响 ,引入局部动位移修正项 ,推导了在任意荷载激励下梁单元的局部效应修正公式 ,并对斜拉桥结构在任意载荷激励下进行动力响应计算。计算结果表明 ,梁、塔单元的剪力修正项在考虑局部效应时与一般有限元方法存在较大误差 ,特别是塔单元的剪力修正值尤为显著。而对于索单元的动内力计算几乎没有影响 ,这与实际情况相符。在进行大型复杂结构的动力响应分析时 ,通过考虑局部效应 ,可以获得较为精确的结果更多还原

【Abstract】 Based on general finite element principle, by considering the effect of continuous mass gravity, the partial effect modification formulation of beam element subjected to arbitrary excitation is presented in this paper when the partial dynamic deflection is introduced By analyzing dynamic response of cable?stayed bridge under arbitrary excitation, it indicates that there is a great deviation of shearing force when comparing partial effect to general finite element method especially that of tower element But there is a little effect on cable element, the results are in conformity with the fact In dynamic response analysis of large?scale complicated structures, by considering partial effect, more accurate desired results can be obtained更多还原