Wire rope isolators for seismically base-isolated lightweight structures: Experimental characterization and mathematical modeling

被引：54

作者：

Vaiana, Nicolo ^{[1
]}

Spizzuoco, Mariacristina ^{[1
]}

Serino, Giorgio ^{[1
]}

机构：

[1] Univ Naples Federico II, Dept Struct Engn & Architecture, Via Claudio 21, I-80125 Naples, Italy

来源：

ENGINEERING STRUCTURES | 2017年 / 140卷

关键词：

Wire rope isolators; Base isolation; Lightweight structures; Nonlinear exponential model; RANDOM VIBRATION; SYSTEMS;

D O I：

10.1016/j.engstruct.2017.02.057

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The results of an extensive series of dynamic and static experimental tests conducted on four Wire Rope Isolators (WRIs) under different values of vertical load are presented. The main aim of this work is identifying the mechanical characteristics of WRIs in three displacements ranges, that is, small, relatively large and large displacements ranges, to allow the use of these metal devices in the base isolation system of seismically base-isolated lightweight structures. In order to simulate the dynamic behavior of WRIs in the two principal horizontal directions, namely, Roll and Shear directions, a one dimensional (Id) Nonlinear Exponential Model, able to simulate the increase of the tangent stiffness observed at larger displacements, is proposed. Compared to the widely used Bouc-Wen model, the proposed one does not require the numerical solution of a first order ordinary nonlinear differential equation, thus decreasing the computational effort of nonlinear time history analyses, and contains a smaller number of parameters to be identified. The mathematical model has been validated by comparing the experimental hysteresis loops obtained during cyclic tests with those predicted analytically. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：498 / 514

页数：17

共 20 条

[1] Seismic retrofitting of an HV circuit breaker using base isolation with wire ropes. Part 2: Shaking-table test validation [J].