Seismic Performance of Timber Bridges

2000 ◽  
Vol 1740 (1) ◽  
pp. 75-84 ◽  
Author(s):  
John B. Mander ◽  
Dion R. Allicock ◽  
Ian M. Friedland
Keyword(s):  
Seismic Performance ◽  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
Research Work ◽  
Highway Bridges ◽  
Longitudinal Direction ◽  
Engineering Research ◽  
Modes Of Failure ◽  
Conducting Research ◽  
Timber Bridges

Compared with the seismic performance of concrete and steel highway bridges, the seismic performance of timber bridges is not well understood. This is because, historically, little effort has been spent on documenting the seismic performance of timber bridges in past earthquakes or conducting research to develop an improved understanding of the seismic design or retrofit requirements for timber bridges. Research work sponsored by FHWA and conducted at the University at Buffalo in conjunction with the Multidisciplinary Center for Earthquake Engineering Research to ( a) document the seismic performance of timber bridges in past earthquakes, ( b) experimentally assess the strength and ductility capabilities of timber pile substructures, and ( c) conduct a seismic vulnerability analysis of timber bridges (principally with shaking in the longitudinal direction) to assess the expected modes of failure is presented. Finally, with a particular emphasis on the 1964 Alaska earthquake, conclusions demonstrating why certain types of behavior lead to failures in timber bridges are drawn.

Highway Bridge Seismic Design: How Current Research May Affect Future Design Practice

2000 ◽  
Vol 1696 (1) ◽  
pp. 209-215
Author(s):  
Ian M. Friedland ◽  
Ronald L. Mayes ◽  
W. Phillip Yen ◽  
John O’Fallon
Keyword(s):  
Seismic Design ◽  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
Highway Bridges ◽  
Highway Bridge ◽  
Design Practice ◽  
Engineering Research ◽  
Future Design ◽  
Design Specifications ◽  
The Impact

Under several contracts sponsored by FHWA, the Multidisciplinary Center for Earthquake Engineering Research has been conducting a research program on highway structure seismic design and construction. Among its objectives, the program studies the seismic vulnerability of highway bridges, tunnels, and retaining structures and develops information that could be used, in the case of bridges, to revise current national design specifications. A specific requirement of the program is to have research results independently reviewed and assessed to determine the impact they may have on future seismic design specifications for highway structures. Some of the important results of the research that has been conducted under the program are summarized, and issues that resulted from this impact assessment about expected changes in future seismic design practice of highway bridges are discussed.

Behavior of CFST-RC Pier under Different Ground Motions

2018 ◽  
Vol 1145 ◽  
pp. 134-139
Author(s):  
Raghabendra Yadav ◽  
Bao Chun Chen ◽  
Hui Hui Yuan ◽  
Zhi Bin Lian
Keyword(s):  
Earthquake Engineering ◽  
Large Scale ◽  
Dynamic Testing ◽  
Ground Motions ◽  
Dynamic Test ◽  
Longitudinal Direction ◽  
Steel Tube ◽  
Engineering Research ◽  
Magnification Factors ◽  
Time Histories

The dynamic testing of large-scale structures continues to play a significant role in earthquake engineering research. The pseudo- dynamic test (PDT) is an experimental technique for simulating the earthquake response of structures and structural components in time domain. A CFST-RC pier is a modified form of CFST laced column in which CFST members are connected with RC web in longitudinal direction and with steel tube in transverse direction. For this study, a CFST -RC pier is tested under three different earthquake time histories having scaled PGA of 0.05g. From the experiment acceleration, velocity, displacement and load time histories are observed. The dynamic magnification factors for acceleration due to Chamoli, Gorkha and Wenchuan ground motions are observed as 12, 10 and 10 respectively. The frequency of the pier is found to be 1.42 Hz. The result shows that this type of pier has excellent static and earthquake resistant properties.

scholarly journals Earthquake engineering research at
 the University of Canterbury

1969 ◽  
Vol 2 (2) ◽  
pp. 186-192
Author(s):  
R. Shepherd
Keyword(s):  
Graduate Student ◽  
Earthquake Engineering ◽  
Research Work ◽  
Engineering School ◽  
Post Graduate ◽  
Engineering Research ◽  
Student Activity ◽  
The University ◽  
New Buildings

In February 1960 the University of Canterbury Engineering School moved to its new buildings at Ilam, thereby gaining
 greatly improved facilities for research work. Subsequently the implementation of a very successful post-graduate scholarship scheme gave much needed encouragernent to graduate student activity.

International Visions and Goals for the Earthquake Engineering Research Institute

2003 ◽  
Vol 19 (2) ◽  
pp. 221-229
Author(s):  
C. D. Poland ◽  
S. M. Alcocer
Keyword(s):  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
The United States ◽  
Capital Investments ◽  
Seismic Safety ◽  
Engineering Research ◽  
History Of ◽  
Tools And Techniques ◽  
Collaborative Efforts ◽  
Research Institute

The Earthquake Engineering Research Institute (EERI) has recently added public advocacy for seismic safety to its rich history of facilitating the discussion amongst earthquake scientists and engineers. In recognition of its unique role as the authoritative source for information in the United States, EERI also seeks to partner with other nations to develop information for use worldwide. In 2002, EERI began forming cooperation agreements with organizations in other countries that encourage the exchange of information, collaborative efforts in learning from earthquakes, joint memberships, development of mitigation tools and techniques, and access to seminars, conferences, and technical publications. The ultimate goal of the program is to arrest the growth of seismic vulnerability worldwide and thereby save lives, protect capital investments, and minimize economic impacts.

scholarly journals GNDT II level approach for seismic vulnerability assessment of Unreinforced Masonry (URM) building stock

2015 ◽  
Vol 3 ◽  
pp. 21-27 ◽  
Author(s):  
Manjip Shakya
Keyword(s):  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
Fragility Curves ◽  
Vulnerability Index ◽  
Seismic Intensity ◽  
Unreinforced Masonry ◽  
Physical Damage ◽  
Building Stock ◽  
Engineering Research ◽  
Evaluation Approach

Unreinforced Masonry (URM) structures, such as historic buildings, traditional buildings and ordinary buildings, exist all over the world and constitute a relevant part of the cultural heritage of humanity. Their protection against earthquakes is a topic of great concern among the earthquake engineering research community. This concern mainly arises from the strong damage or complete loss suffered by these types of structures when subjected to earthquake and also from the need and interest to preserve them as a built heritage. This paper initially presents a methodology for assessing the seismic vulnerability of URM buildings based on vulnerability index evaluation approach. Moreover, this paper presents the correlation between vulnerability index and Macroseismic method to estimate the physical damage in relationship with seismic intensity. Finally, presents implementation of the methodology to construct vulnerability curves, fragility curves and estimate losses.

Detailed Seismic Performance Assessment of High-Value-Contents Laboratory Facility

2015 ◽  
Vol 31 (4) ◽  
pp. 2117-2135 ◽  
Author(s):  
T. Y. Yang ◽  
J. C. Atkinson ◽  
L. Tobber
Keyword(s):  
Performance Assessment ◽  
Seismic Performance ◽  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
Assessment Tools ◽  
Seismic Performance Assessment ◽  
Seismic Loss ◽  
Laboratory Facility ◽  
Recent Earthquakes ◽  
Risk Managers

Recent earthquakes worldwide have shown that even countries with well-established building codes are still vulnerable to economic and societal losses. To properly assess these seismic losses, risk managers and insurers need a well-defined tool to quantify the seismic performance of the facilities. In this paper, detailed performance-based earthquake engineering methodology is applied to assess the seismic vulnerability of a high-value-contents laboratory facility, in Vancouver, Canada. The study demonstrates a detailed implementation of the state-of-the-art performance assessment tools to quantify the seismic loss of facilities that can be readily used by practicing engineers. The results show the first benchmark study to quantify the performance of code-based design and provide valuable information for engineers and facility stakeholders to make informed risk-management decisions.

scholarly journals Seismic Vulnerability Assessment of Slender Masonry Structures

2015 ◽  
pp. 313-330
Author(s):  
Manjip Shakya ◽  
Humberto Varum ◽  
Romeu Vicente ◽  
Aníbal Costa
Keyword(s):  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
Evaluation Method ◽  
Fragility Curves ◽  
Vulnerability Index ◽  
Seismic Intensity ◽  
Masonry Structures ◽  
Physical Damage ◽  
Engineering Research ◽  
Index Evaluation

Existing slender masonry structures, such as Pagoda temples, towers, minarets and chimneys, exist all over the world and constitute a relevant part of the architectural and cultural heritage of humanity. Their protection against earthquakes is a topic of great concern among the earthquake engineering research community. This concern mainly arises from the strong damage or complete loss suffered by these types of structures when subjected to earthquake and also from the need and interest to preserve them. This chapter firstly presents a methodology for assessing the seismic vulnerability of slender masonry structures based on vulnerability index evaluation method. Secondly, presents the correlation between vulnerability index and Macroseismic method to estimate the physical damage in relationship with seismic intensity. Finally, presents implementation of the methodology to construct vulnerability curves, fragility curves and estimate losses.

International visions and goals for the Earthquake Engineering Research Institute

2003 ◽  
Vol 36 (2) ◽  
pp. 103-107
Author(s):  
C.D. Poland ◽  
S.M. Alcocer
Keyword(s):  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
The United States ◽  
Capital Investments ◽  
Seismic Safety ◽  
Engineering Research ◽  
History Of ◽  
Tools And Techniques ◽  
Collaborative Efforts ◽  
Research Institute

The Earthquake Engineering Research Institute (EERI) has recently added public advocacy for seismic safety to its rich history of facilitating the discussion amongst earthquake scientists and engineers. In recognition of its unique role as the authoritative source for information in the United States, EERI also seeks to partner with other nations to develop information for use worldwide. In 2002, EERI began forming cooperation agreements with organizations in other countries that encourage the exchange of information, collaborative efforts in learning from earthquakes, joint memberships, development of mitigation tools and techniques, and access to seminars, conferences, and technical publications. The ultimate goal of the program is to arrest the growth of seismic vulnerability worldwide and thereby save lives, protect capital investments, and minimize economic impacts.

THE MAIN DIRECTIONS OF FINANCING RESEARCH WORK IN THE AGRARIAN SECTOR: INNOVATION

2020 ◽  
Vol 5 (3) ◽  
pp. 41-50
Author(s):  
Abdirashid Babajanov ◽  
Keyword(s):  
Agricultural Sector ◽  
Research Work ◽  
Scientific Basis ◽  
Existing Problems ◽  
Agrarian Sector ◽  
Scientific Institutions ◽  
Conducting Research

The article identifies the existing problems in the main areas of funding for research in the agricultural sector and discusses the issues of improving the efficiency of funds allocated for research.Not limited to conducting research in the field, but also make its introduction and increase the knowledge of consumers of scientific products one of the main directions. Providing scientific institutions with qualified scientific values and creating ample opportunities for the development of the field on a scientific basis

SEISMIC CAPACITY OF MEDIUM SIZE CONTINUOUS BRIDGES WITH LEAD-RUBBER BEARINGS

2019 ◽  
Vol 3 (Special Issue on First SACEE'19) ◽  
pp. 199-206
Author(s):  
Bertha Olmos ◽  
José Jara ◽  
José Luis Fabián
Keyword(s):  
Seismic Performance ◽  
Seismic Vulnerability ◽  
Base Isolation ◽  
Elastic Behaviour ◽  
Medium Size ◽  
Nonlinear Behaviour ◽  
Seismic Capacity ◽  
Damage Scenarios ◽  
Isolation Systems ◽  
Rubber Bearings

This paper investigates the effects of the nonlinear behaviour of isolation pads on the seismic capacity of bridges to identify the parameters of base isolation systems that can be used to improve seismic performance of bridges. A parametric study was conducted by designing a set of bridges for three different soil types and varying the number of spans, span lengths, and pier heights. The seismic responses (acceleration, displacement and pier seismic forces) were evaluated for two structural models. The first model corresponded to the bridges supported on elastomeric bearings with linear elastic behaviour and the second model simulated a base isolated bridge that accounts for the nonlinear behaviour of the system. The seismic demand was represented with a group of twelve real accelerograms recorded on the subduction zone on the Pacific Coast of Mexico. The nonlinear responses under different damage scenarios for the bridges included in the presented study were estimated. These results allow determining the seismic capacity of the bridges with and without base isolation. Results show clearly the importance of considering the nonlinear behaviour on the seismic performance of bridges and the influence of base isolation on the seismic vulnerability of medium size bridges.

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