基于耐震时程法的进水塔结构抗震性能分析

进水塔结构作为水电站的进水建筑物，其抗震性能对水电站的安全运行有重要意义。以沙牌水电站的高耸独立进水塔结构为研究对象，应用3条耐震时程曲线对其进行抗震性能分析与评估，并将计算结果与天然地震动下的增量动力分析结果进行比较，对比分析进水塔塔顶位移、基底剪力及地震损伤历程。实例研究表明：耐震时程法可以较好地分析结构的抗震响应，与增量动力分析结果的均值相匹配。耐震时程法可以利用较少的时程分析得到不同动力强度作用下的结构响应，且计算结果精度好、效率高，为进水塔结构的抗震性能分析提供一种新的手段。

Seismic performance of intake tower structuresbased on endurance time method

The seismic performance of intake tower structure is of great significance to the safety and operation of hydropower stations. The seismic performance of the high-rise independent intake tower structure of Shapai Hydropower Station was analyzed and evaluated subjected to three endurance time accelerograms (ETAs). The calculation results were then compared with the incremental dynamic analysis (IDA) results under natural ground motions, and the comparisons of the top displacement, the base shear, and the seismic damage history of the intake tower were performed. The case study results showed that compared with IDA method, the endurance time method can better analyze the seismic response of the structure and match the mean value of IDA results. The endurance time method can get the structure response under different dynamic strengths by using less time-history analysis, and the calculation results are accurate and efficient, thus providing a new method for the seismic performance analysis of the water intake tower structure.