scholarly journals ULTIMATE PROPERTIES OF LARGE-SCALE LEAD RUBBER BEARING USING FULL-SCALE BREAK TEST

2017 ◽  
Vol 82 (732) ◽  
pp. 203-213 ◽  
Author(s):  
Shinji KOSUGI ◽  
Tetsuo IMAOKA ◽  
Kenji KANAZAWA ◽  
Takafumi HIRAKI ◽  
Seiji NAGATA ◽  
...  
Keyword(s):  
Large Scale ◽  
Full Scale ◽  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
Ultimate Properties ◽  
Scale Break

Experimental study on the compressive stress dependency of full scale low hardness lead rubber bearing

2014 ◽  
Vol 50 (1) ◽  
pp. 89-103 ◽  
Author(s):  
Hong-Pyo Lee ◽  
Myung-Sug Cho ◽  
Sunyong Kim ◽  
Jin-Young Park ◽  
Kwang-Seok Jang
Keyword(s):  
Experimental Study ◽  
Compressive Stress ◽  
Full Scale ◽  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
Stress Dependency

Coupled Thermo-Hydro-Geochemical Models of Engineered Barrier Systems: The Febex Project

2000 ◽  
Vol 663 ◽  
Author(s):  
J. Samper ◽  
R. Juncosa ◽  
V. Navarro ◽  
J. Delgado ◽  
L. Montenegro ◽  
...  
Keyword(s):  
Large Scale ◽  
Reference Model ◽  
Numerical Models ◽  
Full Scale ◽  
Small Scale ◽  
Model Parameters ◽  
In Situ Test ◽  
Wide Range ◽  
Engineered Barrier

ABSTRACTFEBEX (Full-scale Engineered Barrier EXperiment) is a demonstration and research project dealing with the bentonite engineered barrier designed for sealing and containment of waste in a high level radioactive waste repository (HLWR). It includes two main experiments: an situ full-scale test performed at Grimsel (GTS) and a mock-up test operating since February 1997 at CIEMAT facilities in Madrid (Spain) [1,2,3]. One of the objectives of FEBEX is the development and testing of conceptual and numerical models for the thermal, hydrodynamic, and geochemical (THG) processes expected to take place in engineered clay barriers. A significant improvement in coupled THG modeling of the clay barrier has been achieved both in terms of a better understanding of THG processes and more sophisticated THG computer codes. The ability of these models to reproduce the observed THG patterns in a wide range of THG conditions enhances the confidence in their prediction capabilities. Numerical THG models of heating and hydration experiments performed on small-scale lab cells provide excellent results for temperatures, water inflow and final water content in the cells [3]. Calculated concentrations at the end of the experiments reproduce most of the patterns of measured data. In general, the fit of concentrations of dissolved species is better than that of exchanged cations. These models were later used to simulate the evolution of the large-scale experiments (in situ and mock-up). Some thermo-hydrodynamic hypotheses and bentonite parameters were slightly revised during TH calibration of the mock-up test. The results of the reference model reproduce simultaneously the observed water inflows and bentonite temperatures and relative humidities. Although the model is highly sensitive to one-at-a-time variations in model parameters, the possibility of parameter combinations leading to similar fits cannot be precluded. The TH model of the “in situ” test is based on the same bentonite TH parameters and assumptions as for the “mock-up” test. Granite parameters were slightly modified during the calibration process in order to reproduce the observed thermal and hydrodynamic evolution. The reference model captures properly relative humidities and temperatures in the bentonite [3]. It also reproduces the observed spatial distribution of water pressures and temperatures in the granite. Once calibrated the TH aspects of the model, predictions of the THG evolution of both tests were performed. Data from the dismantling of the in situ test, which is planned for the summer of 2001, will provide a unique opportunity to test and validate current THG models of the EBS.

So what's new? A survey of the education policies of orchestras and opera companies

1996 ◽  
Vol 13 (3) ◽  
pp. 259-270 ◽  
Author(s):  
Julia Winterson
Keyword(s):  
Large Scale ◽  
Full Scale ◽  
School Teachers ◽  
Education Policies ◽  
Art Galleries ◽  
High Profile ◽  
Creative Music ◽  
Direct Support

Originally, the creative music workshop involving professional players was intended to give direct support to school teachers and to enhance music in the classroom, but today's large-scale, high-profile projects mounted by orchestras and opera companies appear to be developing into a full-scale industry on their own. Their role in partnership with schools and colleges now requires clarification: a survey of education policies has revealed some confusion of aims with few bodies looking closely at objectives, outcomes and effects. Music companies could profit from the experience of museums and art galleries.

Seismic performance of Greater Jakarta LRT with added lead rubber bearing using non-linear time history analysis

2021 ◽  
Author(s):  
Iswandi Imran ◽  
Marie Hamidah ◽  
Tri Suryadi ◽  
Hasan Al-Harris ◽  
Syamsul Hidayat
Keyword(s):  
Linear Time ◽  
Time History ◽  
Time History Analysis ◽  
Performance Level ◽  
Structural Performance ◽  
Isolation System ◽  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
History Analysis ◽  
Seismic System

<p>In order to overcome stringent seismic requirement in the new Greater Jakarta Light Rail Transit Project, a breakthrough seismic system shall be chosen to obtain expected structural performance. This seismic system shall be designed to provide operational performance level after strong earthquake events. To achieve the criteria, seismic isolation system using Lead Rubber Bearings is chosen. With this isolation system, Greater Jakarta LRT has become the first seismically isolated infrastructure and apparently an infrastructure with the largest numbers of LRBs in one single project in Indonesia. More than 10.400 Pcs LRBs are used for the first phase of the construction and the numbers will be certainly increased in the next phase of the construction. To evaluate the structural performance, non-linear time history analysis is used. A total of 3 pair matched ground motions will be used as the input for the response history analysis. The ability of the lead rubber bearing to isolate and dissipate earthquake actions will determine its structural performance level. This will be represented by the nonlinear hysteretic curves obtained throughout the earthquake actions.</p>

scholarly journals A comparative study of base isolation devices in light rail transit structure featured with lead rubber bearing and friction pendulum system

2018 ◽  
Vol 195 ◽  
pp. 02013
Author(s):  
Santi Nuraini ◽  
Asdam Tambusay ◽  
Priyo Suprobo
Keyword(s):  
Seismic Isolation ◽  
Time History ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Pendulum System ◽  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
Friction Pendulum ◽  
Friction Pendulum System

Advanced nonlinear analysis in light rail transit (LRT) structures has been undertaken to examine the influence of seismic isolation devices for reducing seismic demand. The study employed the use of two types of commercially available bearings, namely lead rubber bearing (LRB) and friction pendulum system (FPS). Six LRT structures, designed to be built in Surabaya, were modelled using computer-aided software SAP2000, where each of the three structures consisted of three types of LRB and FPS placed onto the pier cap to support the horizontal upper-structural member. Nonlinear static pushover and dynamic time history analysis with seven improved ground motion data was performed to gain improved insights on the behavioural response of LRT structures, allowing one to fully understand the supremacy of seismic isolations for protecting the structure against seismic actions. It is shown that both devices manage to isolate seismic forces, resulting in alleviation of excessive base shear occurring at the column. In addition, it is noticeable that the overall responses of LRB and FPS shows marginal discrepancies, suggesting both devices are interchangeable to be used for LRT-like structures.

scholarly journals Respuesta Sísmica de Tanques de Concreto Armado para Almacenamiento de Agua con Sistema de Aislación del Tipo Elastomérico con Núcleo de Plomo

2019 ◽  
Vol 16 (2) ◽  
Author(s):  
Elvis Jony Mamani
Keyword(s):  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
El Sistema

Se muestran las respuestas sísmicas de tanques de Concreto Armado (CA) para almacenamiento de agua con sistema de aislación del tipo Elastomérico con Núcleo de Plomo (lead rubber bearing, LRB) bajo solicitación sísmica bi-direccional. Para el análisis sísmico se consideró que el tanque posee comportamiento lineal elástico, además se empleó un modelo mecánico equivalente para representar la interacción tanque-agua, y se utilizó un modelo histerético del tipo bi-axial para representar el comportamiento del sistema de aislación. Los parámetros de estudio son: la razón altura de agua-radio interior del tanque, la razón espesor de la pared del tanque-radio interior del tanque, el periodo de vibración objetivo del sistema de aislación, y la razón de resistencia del sistema de aislación. Se utilizaron 21 pares de registros sísmicos del movimiento del suelo. Las respuestas sísmicas del sistema de base aislada muestran una efectividad en la reducción de los valores de la fuerza cortante basal en comparación con el sistema de base fija del orden de 17% a 74% para H/R = 0.5; de 50% a 83% para H/R = 1.0; de 75% a 91% para H/R = 2.0 (H/R = razón altura de agua-radio interior del tanque).

Pseudo Architecture: Holographic Monument

Leonardo ◽  
2013 ◽  
Vol 46 (3) ◽  
pp. 288-289
Author(s):  
Andrew Pepper
Keyword(s):  
Large Scale ◽  
Full Scale

The author discusses an architectural installation incorporating the holographic shadows of water installed in a miniature townscape as part of a collaborative, developmental, group exhibition. The installation concept is outlined and its impact on the ability to stimulate architectural interventions, which would not normally be possible within a full-scale environment, is considered. The influence of a major large-scale holographic installation is outlined and the requirement to suspend belief, within the current exhibition, is discussed.

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