论文部分内容阅读
本文以2015年5月21日20时零7分在贵州省贞丰县镇宁布依族苗族自治县交界处发生的3.0级地震为背景,从工程应用的角度介绍了水工建筑物强震动加速度记录及数据处理分析的方法。强震动加速度记录经过数据校正、滤波、降噪、积分、谱分析后,可得到速度、位移、场地卓越周期以及水工建筑物安全指数等,通过对震源的评估以及强震动参数值的计算,能快速对水电站大坝水工建筑物的安全进行震害评估。经计算,强震动记录值在本次地震中,最大峰值加速度值为53.1418Gal,最大加速度响应值周期为0.1s左右,傅里叶变换后得到的主频值在8~14Hz,水工建筑物安全指数y_a=1.06>1。综合分析后,判定本次地震对大坝结构安全无影响。
Based on the 3.0 magnitude earthquake occurring at the junction of Zhenning Buyi and Miao Autonomous County, Zhenfeng County, Guizhou Province, China at 20:57 on May 21, 2015 at 20:07, the strong earthquake acceleration records and data of hydraulic structures are introduced from the perspective of engineering application Method of processing analysis. After the data of strong vibration acceleration records are filtered, denoised, integrated and spectrum analyzed, the velocity, displacement, excellent period of site and safety index of hydraulic structures can be obtained. Through the assessment of source and the calculation of strong vibration parameters, It can quickly evaluate the seismic damage to the hydraulic structure of hydroelectric dam. According to the calculation, the value of strong vibration recorded in this earthquake is 53.1418Gal, the maximum acceleration response time is about 0.1s, the main frequency value obtained after Fourier transform is 8-14Hz, Safety index y_a = 1.06> 1. After a comprehensive analysis, it is determined that the earthquake has no effect on dam structure safety.