Dimensional pounding response analysis for adjacent inelastic MDOF structures based on modified Kelvin model

IF 2.2 4区 工程技术 Q2 ENGINEERING, CIVIL
Chen Xuyong, Xiao Xuehao, Xixuan Bai, Wu Qiaoyun
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引用次数: 1

Abstract

The dimensional analysis method is used to study the pounding response of two inelastic MDOF (multi-degree-offreedom) structures under simplified earthquake excitation. The improved Kelvin pounding model is adopted to simulate the force and deformation of the collisions during the contact process. The bilinear interstory resistance model is used to describe the inelastic characteristics of the MDOF structures. The expression of dimensionless pounding force and the equation of dimensionless motion during the collision process are derived. Based on the above theoretical derivation, the accuracy of the improved Kelvin model is verified by comparing the pounding responses in the form of spectra between the improved Kelvin model and Kelvin model. The effects of the pounding on the response of the left structure (with a smaller mass and stiffness) are analyzed in different trend (amplification region, suppression region and unaffected region), and the self-similarity of the pounding response for the two inelastic MDOF structures is revealed. The effects of the story mass ratio, post-yield stiffness ratio, yield displacement and structure spacing on the pounding response are studied. The peak displacement response of the left side structure increases with the increasing of story mass ratio and decreases with the increasing of yield displacement and postyield stiffness ratio. With the increasing of structure spacing, the peak displacement decreases in the first spectrum region, and in the second spectrum region, the peak displacement increases. Moreover, the change of the parameters has little effect on the response of the right structure (with a larger mass and stiffness).
基于修正Kelvin模型的相邻非弹性多自由度结构量纲冲击响应分析
采用量纲分析法研究了两种非弹性多自由度结构在简化地震激励下的冲击响应。采用改进的开尔文冲击模型来模拟接触过程中碰撞的力和变形。采用双线性层间阻力模型来描述多自由度结构的非弹性特性。导出了碰撞过程中无量纲冲击力的表达式和无量纲运动方程。在上述理论推导的基础上,通过比较改进开尔文模型与开尔文模型之间以谱形式的冲击响应,验证了改进开尔文模型的准确性。从不同的趋势(放大区、抑制区和未影响区)分析了冲击对质量和刚度较小的左侧多自由度结构响应的影响,揭示了两种非弹性多自由度结构的冲击响应的自相似性。研究了层质量比、屈服后刚度比、屈服位移和结构间距对冲击响应的影响。左侧结构的峰值位移响应随层质量比的增大而增大,随屈服位移和后场刚度比的增大而减小。随着结构间距的增大,第一光谱区域的峰值位移减小,第二光谱区域的峰值位移增大。此外,参数的变化对右结构(质量和刚度较大)的响应影响不大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Structural Engineering and Mechanics
Structural Engineering and Mechanics 工程技术-工程:机械
CiteScore
3.80
自引率
18.20%
发文量
0
审稿时长
11 months
期刊介绍: The STRUCTURAL ENGINEERING AND MECHANICS, An International Journal, aims at: providing a major publication channel for structural engineering, wider distribution at more affordable subscription rates; faster reviewing and publication for manuscripts submitted; and a broad scope for wider participation. The main subject of the Journal is structural engineering concerned with aspects of mechanics. Areas covered by the Journal include: - Structural Mechanics - Design of Civil, Building and Mechanical Structures - Structural Optimization and Controls - Structural Safety and Reliability - New Structural Materials and Applications - Effects of Wind, Earthquake and Wave Loadings on Structures - Fluid-Structure and Soil-Structure Interactions - AI Application and Expert Systems in Structural Engineering. Submission of papers from practicing engineers is particularly encouraged.
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