基础隔震结构的楼面设计反应谱研究

党育1,李国宝1,谢鹏飞2

振动与冲击 ›› 2023, Vol. 42 ›› Issue (7) : 321-332.

PDF(2176 KB)
PDF(2176 KB)
振动与冲击 ›› 2023, Vol. 42 ›› Issue (7) : 321-332.
论文

基础隔震结构的楼面设计反应谱研究

  • 党育1,李国宝1,谢鹏飞2
作者信息 +

Floor design response spectrum of base-isolated structure

  • DANG Yu1, LI Guobao1, XIE Pengfei2
Author information +
文章历史 +

摘要

依据基础隔震结构楼面反应谱的谱形特点,将谱曲线分段进行回归分析,确定各段谱曲线的形状,得到一种双峰值的基础隔震结构楼面设计反应谱。考虑影响基础隔震结构楼面反应谱的各主要因素,如结构动力参数、场地特性、地震动强度、结构与设备的相互作用和设备阻尼等,用正交试验法,分析基础隔震结构-设备组合体系的楼面反应谱,以拟合优度最大为目标,分段标定楼面设计反应谱的各特征参数并统计拟合出各特征参数的计算公式。通过三个实际的基础隔震工程-设备实例验证,结果表明:建立的标准化的楼面设计反应谱,能忠实地反映楼面反应谱的频谱特性,还原楼面反应谱的曲线变化,各段曲线的谱值可基本包络楼面反应谱;与时程分析法的结果相比,用该楼面设计反应谱求得各设备的地震作用,误差均在10%以内,说明该楼面设计反应谱具有较高的精度和较好的工程实用性。

Abstract

Based on the spectral characteristics of the floor response spectrum of base isolated structure, the spectral curve is divided into sections for regression analysis to determine the shape of the spectral curve of each section, and a double-peak floor design response spectrum of base isolated structure is obtained. Consider the main factors that affect the floor response spectrum of base isolated structure, such as the dynamic parameters of the seismic isolation structure, site characteristics, ground motion intensity, the interaction between the seismic isolation structure and the equipment, and equipment damping. Using the orthogonal experiment method, analyze the floor response spectrum of base isolated structure-equipment combination system. Taking the maximum goodness of fit as the goal, the characteristic parameters of the floor design response spectrum are calibrated section by section, and the calculation formula of each characteristic parameter is statistically fitted. Through the verification of three actual base isolated engineering-equipment examples, the results show that the established standardized floor design response spectrum can faithfully reflect the spectral characteristics of the floor response spectrum, restore the curve changes of the floor response spectrum, and the spectrum value of each section of the curve can better envelop the floor response spectrum. Compared with the results of time-history analysis method, the error of seismic action of each equipment obtained based on the floor design response spectrum is within 10%, indicating that the floor design response spectrum has high accuracy and good engineering practicability.

关键词

楼面谱 / 基础隔震 / 设计反应谱 / 特征参数

Key words

floor response spectra;base isolated  / structures;design response spectrum;characteristic parameters

引用本文

导出引用
党育1,李国宝1,谢鹏飞2. 基础隔震结构的楼面设计反应谱研究[J]. 振动与冲击, 2023, 42(7): 321-332
DANG Yu1, LI Guobao1, XIE Pengfei2. Floor design response spectrum of base-isolated structure[J]. Journal of Vibration and Shock, 2023, 42(7): 321-332

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