论文部分内容阅读
本文介绍了二滩水电站抛物线型双曲拱坝初设阶段抗震分析的主要方法——“混合法”。该法将利用ADAP有限元动力分析程序求出的前15阶自振特牲,按反应谱法,通过换算插补,得出拱梁分载法(试载法)中拱梁交点处的各阶地震惯性力和动水压力强度;然后用我院自编的ADSC-CK抛物线型拱坝多拱梁应力计算程序,求出各阶的地震反应,按平方和开方(SRSS)法得出各交点处15阶振型的组合地震反应;最后,与拱梁分载法算出的静应力叠加,得到地震竹况下坝体的总应力分布,从而按相应的应力控制标准检验大坝抗震强度。
This paper introduces the main method of seismic analysis for the initial stage of the parabolic hyperbolic arch dam at Ertan Hydropower Station - the “mixing method”. The method will use the ADAP finite element dynamic analysis program to find the first 15 orders of self-vibration, according to the response spectrum method, by interpolation, the arched beam loading method (loading method) at the intersection of arches Order seismic inertia force and hydrodynamic pressure intensity. Then, the stress response of each step of the ADSC-CK parabolic arch dam multi-arch girder is calculated and the square root sum of square root method (SRSS) method is derived Finally, the superposition of the static stress calculated by the load-bearing method of the arch girder gives the total stress distribution of the dam body under the earthquake condition, and then tests the dam’s seismic strength according to the corresponding stress control standard .