CAJ | 학술논문

在严格的理论公式推导基础上,对多点地震动合成模拟方法加以简化改进.简化方法将行波效应与不相干效应分开考虑,完全避免了复数运算,可有效降低计算量.提出应根据《建筑抗震设计规范(GB50011—2010)》确定多点地震动所需参数,迭代调整多点地震动以满足规范反应谱的要求,提高所得时程的实用性.通过算例对多种现有多点地震动合成方法的准确性加以验证和分析,指出某些方法在没有严格理论推导的基础上人为改变合成公式,导致其所得多点地震动不满足相干性要求,应谨慎使用.
재엄격적이론공식추도기출상,대다점지진동합성모의방법가이간화개진.간화방법장행파효응여불상간효응분개고필,완전피면료복수운산,가유효강저계산량.제출응근거《건축항진설계규범(GB50011—2010)》학정다점지진동소수삼수,질대조정다점지진동이만족규범반응보적요구,제고소득시정적실용성.통과산례대다충현유다점지진동합성방법적준학성가이험증화분석,지출모사방법재몰유엄격이론추도적기출상인위개변합성공식,도치기소득다점지진동불만족상간성요구,응근신사용.
Based on strict theoretical formula derivation,simulation method of spatially correlated earthquake ground motions is simplified and improved. In the simplified method,wave passage effect and incoherence effect are considered separately,and computational complexity is reduced since the complex calculation is avoided. It's pro-posed that parameters used in the simulation should be determined according to Code for Seismic Design of Build-ings(GB50011—2010),and to enhance the method's practicality,ground motions should be adjusted to satisfy the response spectrum supplied in the code. Some existing simulation methods have been studied to verify their accuracy. Numerical analysis shows that ground motions gained from some of the existing methods which change the formula artificially without indispensable theoretical proving may not satisfy the coherence,and should be used with reserva-tion.