摘要
文章采用谐波合成法(WAWS法)模拟了空间变化的非平稳的地震加速度时程,通过对模拟结果的功率谱与目标功率谱密度进行比较,验证了谐波合成法的有效性和可行性。文章模拟的空间各点的地震加速度时程曲线既考虑了多点激励的行波效应,又考虑了地震动的空间相干性,用于计算大跨度结构在地震作用下的响应更加接近实际情况。
In this paper, the authors use spectral representation（WSWS method ）,and simulate non-stationary spatial correlative time histories of multi-point ground motion. Through comparing the power spectrum of the simulation results and the theory results, the harmonic synthesis are proved to be valid and feasible. The paper simulates space points of the earthquake acceleration-time curve and take not only the multi-point excitation wave effect into account, hut also the spatial coherence of ground motion, which is used to calculate the long-span structures under earthquake response closer to reality.
出处
《企业科技与发展》
2012年第11期26-29,共4页
Sci-Tech & Development of Enterprise
关键词
谐波分析法
地震
空间相关
Superposition Harmonic Method
earthquake
spatial coherence
