Extraction of Fixed-Base Modes of a Structure Mounted on a Shake Table

2013 ◽  
pp. 299-309 ◽  
Author(s):  
Kevin L. Napolitano ◽  
Nathanael C. Yoder ◽  
William A. Fladung
Keyword(s):  
Shake Table ◽  
Fixed Base

Experimental Evaluation of the Seismic Response of a Rooftop-Mounted Cooling Tower

2015 ◽  
Vol 31 (3) ◽  
pp. 1567-1589 ◽  
Author(s):  
Rodrigo Astroza ◽  
Elide Pantoli ◽  
Francesco Selva ◽  
José I. Restrepo ◽  
Tara C. Hutchinson ◽  
...  
Keyword(s):  
Seismic Response ◽  
Cooling Tower ◽  
Ground Motions ◽  
Shake Table ◽  
Concrete Building ◽  
Fixed Base ◽  
Two Phases ◽  
The University ◽  
Measured Response ◽  
Current Code

This paper examines the seismic response of a cooling tower supported on four isolation/restraint (I/R) mounts. The tower was mounted on the roof of a five-story reinforced concrete building built at full-scale and tested on the large outdoor unidirectional shake table at the University of California, San Diego. The building was tested in two phases: (1) base-isolated and (2) fixed-base. In each phase, the building was subjected to six earthquake input ground motions reproduced by the shake table. In this paper, the measured response of the cooling tower and its supporting system are analyzed and compared to current code provisions.

Representation of information in SEM by equal signal lines

1978 ◽  
Vol 36 (1) ◽  
pp. 144-145
Author(s):  
E. Rau ◽  
N. Karelin ◽  
V. Dukov ◽  
M. Kolomeytsev ◽  
S. Gavrikov ◽  
...  
Keyword(s):  
Electronic System ◽  
Space Distribution ◽  
Specimen Surface ◽  
Universal Method ◽  
Base Level ◽  
Signal Value ◽  
Information Signal ◽  
Fixed Base ◽  
Scanning Line ◽  
Amplitude Analyzer

There are different methods and devices for the increase of the videosignal information in SEM. For example, with the help of special pure electronic [1] and opto-electronic [2] systems equipotential areas on the specimen surface in SEM were obtained. This report generalizes quantitative universal method for space distribution representation of research specimen parameter by contour equal signal lines. The method is based on principle of comparison of information signal value with the fixed levels.Transformation image system for obtaining equal signal lines maps was developed in two versions:1)In pure electronic system [3] it is necessary to compare signal U (see Fig.1-a), which gives potential distribution on specimen surface along each scanning line with fixed base level signals εifor obtaining quantitative equipotential information on solid state surface. The amplitude analyzer-comparator gives flare sport videopulses at any fixed coordinate and any instant time when initial signal U is equal to one of the base level signals ε.

A solution to the rear-vision problem in a fixed-base driving simulator

2004 ◽  
Author(s):  
Guihua Yang ◽  
Farnaz Baniahmad ◽  
Beverly K. Jaeger ◽  
Ronald R. Mourant
Keyword(s):  
Driving Simulator ◽  
Fixed Base

A Critical Analysis of Selected Public and Private Mutual Fund Schemes in India

2019 ◽  
Vol 118 (8) ◽  
pp. 28-34
Author(s):  
Dr. V. Murali Krishna ◽  
Dr T. Hima Bindu ◽  
Dr. Ravikumar Gunakala
Keyword(s):  
Mutual Funds ◽  
Capital Market ◽  
Mutual Fund ◽  
Portfolio Diversification ◽  
Financial Intermediaries ◽  
Public And Private ◽  
Fund Managers ◽  
Fixed Base ◽  
Banking Institutions ◽  
Different Levels

Mutual Fund Industry is one of the emerged dominant financial intermediaries in Indian Capital Market. The main objective of investing in a mutual fund is to diversify risk. Though the mutual fund invests in diversified portfolio, the fund managers take different levels of risk in order to achieve the schemes objectives. Mutual funds allow portfolio diversification and relative risk management through collection of funds from the savers/investors, the same investing in equity and debt stocks. This type of invested funds is managed by professional experts called as fund managers Funds are categorized as income should fixed base in India are a kind of mutual fund which makes investment in debt securities that have been issued to the corporate, banking institutions and to government in general

Innovative mobile method to determine railway track axis position in global coordinate system using position measurements performed with GNSS and fixed base of the measuring vehicle

Measurement ◽  
2021 ◽  
Vol 175 ◽  
pp. 109016
Author(s):  
Andrzej Wilk ◽  
Władysław Koc ◽  
Cezary Specht ◽  
Jacek Skibicki ◽  
Slawomir Judek ◽  
...  
Keyword(s):  
Coordinate System ◽  
Railway Track ◽  
Global Coordinate System ◽  
Fixed Base ◽  
Axis Position

Design of a Shake Table with Moderate Cost

2021 ◽  
Author(s):  
H. Damerji ◽  
S. Yadav ◽  
Y. Sieffert ◽  
L. Debove ◽  
F. Vieux-Champagne ◽  
...  
Keyword(s):  
Shake Table ◽  
Moderate Cost

Full‐scale shake‐table tests on two unreinforced masonry cavity‐wall buildings: effect of an innovative timber retrofit

2021 ◽  
Author(s):  
Marco Miglietta ◽  
Nicolò Damiani ◽  
Gabriele Guerrini ◽  
Francesco Graziotti
Keyword(s):  
Seismic Vulnerability ◽  
Concrete Slab ◽  
Cost Effective ◽  
Unreinforced Masonry ◽  
Full Scale ◽  
Cavity Wall ◽  
Masonry Walls ◽  
Shake Table ◽  
Earthquake Excitation ◽  
Reinforced Concrete Slab

AbstractTwo full-scale building specimens were tested on the shake-table at the EUCENTRE Foundation laboratories in Pavia (Italy), to assess the effectiveness of an innovative timber retrofit solution, within a comprehensive research campaign on the seismic vulnerability of existing Dutch unreinforced masonry structures. The buildings represented the end-unit of a two-storey terraced house typical of the North-Eastern Netherlands, a region affected by induced seismicity over the last few decades. This building typology is particularly vulnerable to earthquake excitation due to lack of seismic details and irregular distribution of large openings in masonry walls. Both specimens were built with the same geometry. Their structural system consisted of cavity walls, with interior load-bearing calcium-silicate leaf and exterior clay veneer, and included a first-floor reinforced concrete slab, a second-floor timber framing, and a roof timber structure supported by masonry gables. A timber retrofit was designed and installed inside the second specimen, providing an innovative sustainable, light-weight, reversible, and cost-effective technique, which could be extensively applied to actual buildings. Timber frames were connected to the interior surface of the masonry walls and completed by oriented strands boards nailed to them. The second-floor timber diaphragm was stiffened and strengthened by a layer of oriented-strand boards, nailed to the existing joists and to additional blocking elements through the existing planks. These interventions resulted also in improved wall-to-diaphragm connections with the inner leaf at both floors, while steel ties were added between the cavity-wall leaves. The application of the retrofit system favored a global response of the building with increased lateral capacities of the masonry walls. This paper describes in detail the bare and retrofitted specimens, compares the experimental results obtained through similar incremental dynamic shake-table test protocols up to near-collapse conditions, and identifies damage states and damage limits associated with displacements and deformations.

Shake table testing of a low damage steel building with asymmetric friction connections (AFC)

2019 ◽  
Vol 155 ◽  
pp. 129-143 ◽  
Author(s):  
Ali A. Rad ◽  
Gregory A. MacRae ◽  
Nikoo K. Hazaveh ◽  
Quincy Ma
Keyword(s):  
Shake Table ◽  
Shake Table Testing ◽  
Steel Building
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