文档介绍：
简谐激励下旗帜形单自由度滞回系统的频
响特性#
鲁正,高文俊,姜淳*
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(同济大学结构工程与防灾研究所,上海,200092)
摘要:目前,为了控制结构在地震作用下的残余变形,研发了一系列的新型的耗能装置以及
创新的结构体系,例如钢筋混凝土摇摆墙、自复位钢筋混凝土框架。这些系统最突出的特性
在于不仅能像传统的滞回体系一样提供一定的耗能能力,而且还能提供自复位能力减小残余
变形。如今关于旗帜形非线性系统的研究还比较少。本文采用平均法(averaging method)
对单自由度(SDOF)旗帜形滞回系统在简谐激励下的响应求近似解。系统方程的解包含两
个独立的变量α和β,分别代表系统屈服后刚度和耗能能力。改变参数β的值,系统方程涵
盖了双线性弹性体系(没有能量耗散)以及传统的滞回系统。通过参数分析,讨论了参数α
和β对系统响应的影响。
关键词:旗帜形滞回系统;幅频响应;非线性方程
中图分类号:
Response Properties of Flag-Shaped Single
Degree-of-Freedom Hysteretic Systems under Sinusoidal
Excitation
LU Zheng, GAO Wenjun, JIANG Chun
(Research Institute of Structural Engineering and Disaster Reduction, Tongji University,
ShangHai 200092)
Abstract: Recently, in order to control the residual deformations of structures under seismic
loading, a number of energy dissipating devices and innovative structural systems have been
developed, such as rocking reinforced concrete walls and self-centering reinforced concrete frame.
The most significant characteristic of these systems is their capacity to provide a specified amount
of energy dissipation as traditional hysteretic systems provide. Furthermore, these systems have
the capacity to ensure small residual drifts, through their self-centering capabilities. Little
information is available on the nonlinear dynamics of systems exhibiting flag-shaped hysteresis. In
this p