密松水电站副厂房结构抗震分析

水电站副厂房是设置重要电气设备和工作人员工作的主要场所，其抗震安全性直接关系到整个电站的安全运行，以密松水电站副厂房为例，采用振型分解反应谱法对其结构进行抗震计算分析，给出了结构自振特性及在地震作用下的动应力、动位移，并采用最不利组合法将动力计算结果与静力计算结果进行叠加，对叠加后的结构应力及位移进行评估分析。结果表明，高地震烈度下，副厂房结构上部纵、横梁底部应力较大，建议在这些部位增大梁截面尺寸或加强配筋，以保证副厂房结构的安全运行。

Seismic Analysis of Auxiliary Powerhouse of Misong Hydropower Station

Auxiliary powerhouse of hydropower station is the main sites for setting the important electrical equipment, and it is also the work place of the staff. Its seismic safety is of important concern. Taking the auxiliary powerhouse of Misong hydropower station as an example, seismic analysis including self vibration characteristics, seismic displacement and seismic stress of the auxiliary powerhouse is performed by using mode decomposition response spectrum method. By superimposing the results of dynamic and static calculation with the most unfavorable combination method, the aseismatic behavior of auxiliary powerhouse is evaluated. The results show that the beam stress in upper structures of auxiliary powerhouse is larger under high seismic intensity. To guarantee the safe operation of auxiliary powerhouse structure, it is recommended that the beam section dimension be increased or the reinforcement in these parts be strengthened.