Seismic Testing of Eccentrically Braced Dual Steel Systems

1989 ◽  
Vol 5 (2) ◽  
pp. 429-449 ◽  
Author(s):  
Andrew S. Whittaker ◽  
Chia-Ming Uang ◽  
Vitelmo V. Bertero
Keyword(s):  
Building Research Institute ◽  
Large Size ◽  
Earthquake Simulator ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Earthquake Research ◽  
Strength And Stiffness ◽  
Experimental Values ◽  
The University ◽  
The U.S

Two six-story eccentrically braced dual steel systems (EBDSs) were tested as part of the U.S.-Japan Cooperative Earthquake Research Program. The first, a full-scale structure ( prototype) was pseudo-dynamically tested in the Large Size Structures Laboratory of the Building Research Institute in Tsukuba, Japan. The second, a similitude scaled replica of the first, was tested on the earthquake simulator at the University of California at Berkeley. The prototype was designed for the minimum earthquake forces specified by the 1981 Japanese Aseismic Code and satisfied the current earthquake-resistant design regulations in the U.S.A. (1985 UBC, 1984 ATC 3-06 and 1986 SEAOC). The performance of the EBDS (both prototype and model) was outstanding in terms of its elastic strength and stiffnesses during minor earthquake shaking and its ability to absorb and dissipate energy, without strength and stiffness degradation, during severe earthquake shaking. Substantial overstrengths of both EBDSs with respect to their nominal yielding strengths were observed during severe earthquake shaking. However, the response modification factors currently adopted by the ATC and SEAOC significantly overestimated the experimental values in both instances.

scholarly journals Recent development in seismic design of reinforced concrete buildings in Japan

1991 ◽  
Vol 24 (4) ◽  
pp. 333-340
Author(s):  
H. Aoyama
Keyword(s):  
Reinforced Concrete ◽  
High Strength ◽  
Response Analysis ◽  
Building Structures ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Construction Methods ◽  
Building Research Institute ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant

Japan experienced a quick development of highrise reinforced concrete frame-type apartment building construction, about 30 stories high, in the last decade. Outline of this development is first introduced in terms of planning of buildings, materials, construction methods, earthquake resistant design and dynamic response analysis. This quick development was made possible by, among others, the available high strength concrete and steel. In an attempt to further promote development of new and advanced reinforced concrete building structures, a five-year national project was started in 1988 in Japan, promoted by the Building Research Institute, Ministry of Construction. Outline of this project is introduced in the second part of this paper. It aims at the development and use of concrete up to 120 MPa, and steel up to 1200 MPa.

Exploring the Potential Use of GFRP Bars in Earthquake-Resistant Concrete Structures

2019 ◽  
Author(s):  
Hayato Auman ◽  
Alessando Palermo ◽  
Victoria Worner ◽  
Allan Scott
Keyword(s):  
Concrete Structures ◽  
Gfrp Bars ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Frp Reinforcement ◽  
And Behavior ◽  
The University ◽  
Corrosion Of Steel ◽  
Potential Use ◽  
Seismic Applications

<p>The corrosion of steel reinforcement is a persistent issue plaguing concrete structures today. The availability of non-corrodible fiber-reinforced polymer (FRP) reinforcement presents an opportunity to mitigate or even eliminate the issue of corrosion, however there is minimal uptake of these bars specifically in seismic applications due to their brittleness. Glass FRP (GFRP) bars, being one of the more common and economical of the FRP products, is being explored at the University of Canterbury for its potential use in earthquake- resistant design. In particular, the cyclic bond of GFRP bars with concrete is being tested using a modified RILEM beam bond test to determine whether they are able to maintain adequate bond with concrete under seismic loading. This paper will discuss the potential use of GFRP bars in seismic applications, drawing form work around the world, and introduce the salient features and behavior of cyclic bonding of GFRP bars as preliminary observations from the bond tests conducted.</p>

scholarly journals The development of seismic zones and the evaluation of lateral loadings for earthquake resistant design of buildings in Papua New Guinea

1982 ◽  
Vol 15 (3) ◽  
pp. 123-140
Author(s):  
R. D. Jury ◽  
J. P. Hollings ◽  
I. A. N Fraser
Keyword(s):  
Papua New Guinea ◽  
Structural Damage ◽  
New Guinea ◽  
Structural Type ◽  
Seismic Zones ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Stage Process ◽  
Strength And Stiffness ◽  
Sufficient Strength

The basis for modern earthquake resistant design can be considered to be a two stage process the objectives of which can be summarised as follows: Provide the structure with sufficient strength and stiffness to resist moderate earthquakes so that the frequency of occurrence of structural and non-structural damage is acceptably low, and Ensure that the probability of collapse of the structure and the risk to life in a severe earthquake is acceptably low. The first stage can be satisfied by seismic zoning to ensure that
the risk of damage to structures of similar structural type is acceptable and approximately uniform over the whole country and by restricting interstorey deflections under moderate earthquakes. The second stage can be satisfied by the use of structural type factors. In particular, this study explains how these principles were used to develop seismic zones and evaluate lateral loadings for Earthquake Resistant Design for Buildings in Papua New Guinea.

scholarly journals FUNDAMENTAL STUDY ON EARTHQUAKE RESISTANT DESIGN OF FILL-TYPE DAMS

1983 ◽  
Vol 1983 (339) ◽  
pp. 127-136 ◽  
Author(s):  
Yoshio OHNE ◽  
Hidehiro TATEBE ◽  
Kunitomo NARITA ◽  
Tetsuo OKUMURA
Keyword(s):  
Fundamental Study ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant

A NEURAL NETWORK-WAVELET MODEL FOR GENERATING ARTIFICIAL ACCELEROGRAMS

2004 ◽  
Vol 02 (03) ◽  
pp. 217-235 ◽  
Author(s):  
GENE F. SIRCA ◽  
HOJJAT ADELI
Keyword(s):  
Neural Network ◽  
Geographic Location ◽  
Training Data ◽  
Wavelet Network ◽  
Design Spectrum ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Structural Configurations ◽  
Earthquake Accelerograms ◽  
Artificial Accelerograms

In earthquake-resistant design of structures, for certain structural configurations and conditions, it is necessary to use accelerograms for dynamic analysis. Accelerograms are also needed to simulate the effects of earthquakes on a building structure in the laboratory. A new method of generating artificial earthquake accelerograms is presented through adroit integration of neural networks and wavelets. A counterpropagation (CPN) neural network model is developed for generating artificial accelerograms from any given design spectrum such as the International Building Code (IBC) design spectrum. Using the IBC design spectrum as network input means an accelerogram may be generated for any geographic location regardless of whether earthquake records exist for that particular location or not. In order to improve the efficiency of the model, the CPN network is modified with the addition of the wavelet transform as a data compression tool to create a new CPN-wavelet network. The proposed CPN-wavelet model is trained using 20 sets of accelerograms and tested with additional five sets of accelerograms available from the U.S. Geological Survey. Given the limited set of training data, the result is quite remarkable.

Earthquake Resistant Design of Intake-Outlet Towers

1975 ◽  
Vol 101 (7) ◽  
pp. 1349-1366
Author(s):  
Anil K. Chopra ◽  
C-Y. Liaw
Keyword(s):  
Earthquake Resistant Design ◽  
Earthquake Resistant

Proposal of orientation-independent measure of intensity for earthquake-resistant design

2021 ◽  
pp. 875529302110382
Author(s):  
Alan Poulos ◽  
Eduardo Miranda
Keyword(s):  
United States ◽  
Ground Motion ◽  
The United States ◽  
Design Codes ◽  
Intensity Measure ◽  
Independent Measure ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Ground Motion Records ◽  
Structural Engineers

A new measure of ground motion intensity in the horizontal direction is proposed. Similarly to other recently proposed measures of intensity, the proposed intensity measure is also independent of the as-installed orientation of horizontal sensors at recording stations. This new measure of horizontal intensity, referred to as MaxRotD50, is defined using the maximum 5%-damped response spectral ordinate of two orthogonal horizontal directions and then computing the 50th percentile for all non-redundant rotation angles, that is, the median of the set of spectral ordinates in a range of 90°. This proposed measure of intensity is always between the median and maximum spectral ordinate for all non-redundant orientations, commonly referred to as RotD50 and RotD100, respectively. A set of 5065 ground motion records is used to show that MaxRotD50 is, on average, approximately 13%–16% higher than Rot50 and 6% lower than RotD100. The new measure of intensity is particularly well suited for earthquake-resistant design where a major concern for structural engineers is the probability that the design ground motion intensity is exceeded in at least one of the two principal horizontal components of the structure, which for most structures are orthogonal to each other. Currently, design codes in the United States are based on RotD100, and hence using MaxRotD50 for structures with two orthogonal principal horizontal components would result in a reduction of the ground motion intensities used for design purposes.

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