洛惠渠渠首砌石拱坝三维动力有限元分析

Three-dimensional Dynamic Analysis for Luohuiqu Stone Masonry Arch Dam with FEM

洛惠渠大坝因年久失修,需要进行加固改造。用有限元动力分析的方法对洛惠渠大坝在地震波作用下,进行动力分析,得到了坝体在温升和温降两种工况下,在不同的地震波作用下的最大应力值及位置。通过对洛惠渠大坝的有限元分析,为大坝加固方案优选提供了理论依据。由计算结果可以得出,在温降和地震波共同作用下,在坝体应力集中部位,最大拉应力超过了材料的应力控制值,要结合具体的运行情况,设定其加固方案。

Luohuiqu dam is used for a long time, and needs to be strengthened. The dynamic analysis is made for Luohuiqu dam under the earthquake waves by using finite element method（FEM）, and the maximum stress values and the locations of the dam body under two conditions of temperature rise and drop and under different seismic waves are obtained. Through the finite element analysis for Luohuiqu dam, the theoretical basis is provided for optimization of the strengthening scheme of the dam. It is obtained from the calculated results that under the temperature drop and seismic waves, the maximum tensile stress is over the stress control value of the material in the stress concentration position, and the strengthening scheme is set up combining with the operating conditions.