2D dynamic and earthquake response analysis of base isolation systems using a convex optimization framework

2019 ◽  
Vol 11 (1-2) ◽  
pp. 11-24 ◽  
Author(s):  
Nicholas D. Oliveto ◽  
Anastasia Athanasiou
Keyword(s):  
Convex Optimization ◽  
Base Isolation ◽  
Earthquake Response ◽  
Response Analysis ◽  
Optimization Framework ◽  
Isolation Systems ◽  
Earthquake Response Analysis

Earthquake Response Analysis of Sliding Base Isolation Frame with Equipment of Sliding-Limit under Collision Responses

2011 ◽  
Vol 105-107 ◽  
pp. 412-416
Author(s):  
Zhong Ming Xiong ◽  
Ming Xing Wei ◽  
Jun Liang Wang
Keyword(s):  
Base Isolation ◽  
Great Influence ◽  
Element Model ◽  
Frame Structure ◽  
Earthquake Response ◽  
Response Analysis ◽  
Technology Application ◽  
Calculation Results ◽  
Earthquake Response Analysis ◽  
Calculation Analysis

In order to get over the defects of traditional sliding base isolation structure which the reactions of traditional sliding structure has always increased during the earthquake, and obtain sliding base isolation technology application for the frame structure. Based on the research of U work performances of energy-absorbed element, the whole element model of this new kind of sliding base isolation three storey frame structure with equipment of sliding-limit was established by the SAP2000 software. According to reasonable hysteretic mode, the calculation analysis under collision responses were carried out. The calculation results showed that the rigidity of the new sliding-limit had a great influence on changes of the storey acceleration and displacement after collision. The maximum base sliding displacement of both earthquakes loading was obviously bigger than that of a single earthquake loading. With the other direction loading earthquake increasing, the maximum base sliding displacement of the structure showed signs of increasing first, and then decreasing. Effective theoretical basis of sliding base isolation technology being applied to the frame structure were provided.

Two-Dimensional Nonlinear Earthquake Response Analysis of a Bridge-Foundation-Ground System

2008 ◽  
Vol 24 (2) ◽  
pp. 343-386 ◽  
Author(s):  
Yuyi Zhang ◽  
Joel P. Conte ◽  
Zhaohui Yang ◽  
Ahmed Elgamal ◽  
Jacobo Bielak ◽  
...  
Keyword(s):  
Lateral Spreading ◽  
Soil Liquefaction ◽  
Earthquake Response ◽  
Response Analysis ◽  
Fe Model ◽  
Two Dimensional ◽  
Foundation Soil ◽  
Soil Medium ◽  
Surface Plasticity ◽  
Earthquake Response Analysis

This paper presents a two-dimensional advanced nonlinear FE model of an actual bridge, the Humboldt Bay Middle Channel (HBMC) Bridge, and its response to seismic input motions. This computational model is developed in the new structural analysis software framework OpenSees. The foundation soil is included to incorporate soil-foundation-structure interaction effects. Realistic nonlinear constitutive models for cyclic loading are used for the structural (concrete and reinforcing steel) and soil materials. The materials in the various soil layers are modeled using multi-yield-surface plasticity models incorporating liquefaction effects. Lysmer-type absorbing/transmitting boundaries are employed to avoid spurious wave reflections along the boundaries of the computational soil domain. Both procedures and results of earthquake response analysis are presented. The simulation results indicate that the earthquake response of the bridge is significantly affected by inelastic deformations of the supporting soil medium due to lateral spreading induced by soil liquefaction.

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