广东省高层建筑抗震设计用地震动功率谱
崔 威1，冼剑华1，苏 成1，2

(1. 华南理工大学 土木与交通学院，广州 510640；2. 华南理工大学 亚热带建筑科学国家重点实验室，广州 510640)

建筑结构;抗震设计;反应谱;地震动功率谱;函数拟合

Earthquake Power Spectrum for Seismic Design of High-Rise Buildings in Guangdong Province
CUI Wei1，XIAN Jianhua1，SU Cheng1，2

(1. School of Civil Engineering and Transportation，South China University of Technology，Guangzhou 510640，China；2. State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou 510640，China)

Building structure;Seismic design;Response spectrum;Seismic power spectrum;Function fitting

DOI: 10.13512/j.hndz.2021.01.16

备注

近年来，为充分反映地震动随机特性对建筑结构的影响，采用真正意义的随机振动分析方法进行建筑结构地震作用计算的需求越来越迫切。为保证随机振动分析方法与传统振型分解反应谱法具有一致的输入条件，需要获取与规范反应谱完全等价的地震动功率谱。基于新修订的广东省《高层建筑混凝土结构技术规程(送审稿)》(DBJ 15-92-2020)，迭代计算获得与该规范反应谱完全等价的地震动功率谱，并采用函数拟合技术获得等价地震动功率谱的拟合公式。此外，文中还讨论了不同功率谱初始形式以及不同结构阻尼比对等价地震动功率谱的影响。

In recent years，to fully reflect the influence of the randomness of ground motion on building structures，it is increasingly desirable that random vibration analysis methods is employed for calculation of seismic responses of the building structures. To ensure that the random vibration analysis methods and the traditional response spectrum method have consistent inputs，the equivalent ground motion power spectrum of earthquake input corresponding to the standard response spectrum needs to be acquired. In the present study，the equivalent power spectrum with respect to the response spectrum in the newly revised draft“Guangdong technical specification for concrete structures of tall building”(DBJ 15-92-2020)is obtained following an iterative procedure，and the function fitting technique is then used to approximate the equivalent power spectrum. In addition，the influences of the initial power spectrum and the structural damping ratio on the equivalent power spectrum are also investigated in this paper.