【摘要】 针对地震作用下计算边界宽度对倒虹吸结构的动力响应情况,以南水北调中线某箱形倒虹吸结构为例,地基采用Mohr-Coulomb非线性本构模型,输入人工地震波,利用ADINA软件在静力基础上进行重启动分析,同时对ADINA进行二次开发,实现了循环计算。结果表明,边界宽度对倒虹吸结构的应力和位移值影响不超过10%,且当达到7倍宽度后,基本趋于稳定,而3倍宽度的倒虹吸结构的加速度放大系数较好,且加速度误差也在工程误差范围内。更多还原

【Abstract】 Aiming at the impact of calculated boundary width on dynamic response of inverted siphon structure under the earthquake,this paper takes box-type inverted siphon structure of middle route in the south-to-north water transfer project as an example.The foundation uses the Mohr-Coulomb nonlinear constitutive model and the artificial seismic wave is taken as input.Based on the static load,ADINA software is used to restart analysis and carry out the secondary development,which realizes the cycle calculation.The results show that the impact of the boundary width on the inverted siphon structure stress and displacement value does not exceed 10%,and tends to be stable when it reaches 7 times of the width;while acceleration amplification factor is better for 3 times of the width of inverted siphon structure,and acceleration error is in engineering error range.更多还原