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System Identification of the Meloland Overcrossing Using Static and Dynamic Field Data
A system identification study was performed using a computer finite element bridge model and measured static and dynamic response data obtained from full-scale quick-release ram field...

Seismic Analysis of Meloland Road Overcrossing Using Calibrated Structural and Foundation Models
A detailed seismic analysis of the Meloland Road Overcrossing is being implemented to study the response of this bridge during the 1979 Imperial Valley Earthquake. This analysis is based...

Ductility Analysis for Seismic Retrofit of Multi-Column Bridge Structures, Santa Monica Viaduct
A new procedure is being developed for the ductility analysis of multi-column bridges. The formation of the plastic hinges in the structure (columns and/or superstructure) is followed...

Lifeline Structure Design Issues?A Case Study of Current Bridge Seismic Design and Application of Recent Seismic Design Research
The purpose of this paper is to present the major design issues addressed in the design of Terminal Separation (Replace) and I-880 Reconstruction. To address these issues Caltrans set...

Tension Pile Test
The California Department of Transportation is conducting FULL SCALE AXIAL LOAD TESTS of 34 piles. This research project/proof test is being jointly conducted by public agencies (Caltrans...

San Francisco Bayshore Viaduct Seismic Retrofit
The Bayshore Freeway viaduct is located in the city of San Francisco and serves as a vital transportation link between the Bay Bridge and points south along Highway 101. This structure...

Link Length Design and EBF Seismic Performance
Twenty eccentrically braced frames (EBFs) are designed using the current seismic design code and newly developed step-by-step design procedure. The EBFs have a variety of link lengths...

Seismic Behavior of Weak-Column Strong-Beam Frames
An experimental evaluation of the seismic performance of moment-resisting steel frames using Weak-Column Strong-Beam joints is described. A simulated seismic response is imposed on five...

Cyclic Behavior and Seismic Design of Steel Base Plates
The objectives of this study were to conduct realistic experiments to understand cyclic behavior of steel column base plates and to develop seismic design recommendations. Six specimens...

Some Unresolved Issues in Seismic Steel Codes
In the latest revisions of the three major U.S. seismic codes (AISC, NEHRP, UBC) some requirements can be questioned because of limited knowledge. Confining attention to conventional kinds...

Recent Improvements in the LLNL PSHA Methodology
For the purpose of comparison, the LLNL PSHA methodology is defined as the 1989 version developed under contract for the NRC. Additional work on a series of subsequent projects for DOE...

Fundamental Issues in Seismic Safety in Midwestern U.S. Due to Hazard/Vulnerability Relation
Problems in establishing and mitigating seismic risk in urban areas when seismicity is not confidently based on instrumental records are discussed. Urban Southwestern Ohio is a specific...

Seismic Standards for Existing Federally Owned and Leased Buildings
Public Law 101-614 requires the Interagency Committee on Seismic Safety in construction to develop 'standards for assessing and enhancing the seismic safety of existing buildings constructed...

Full Model Wind Tunnel Tests for the Akashi Kaikyo Bridge
In order to carry out final verification of the wind resistance safety of the Akashi Kaikyo Bridge under construction, which has the largest main span of 1,990 m, its full aeroelastic...

Wind Tunnel Testing for the Great Belt East Suspension Bridge
This paper provides an overview of model tests conducted to study and predict the aerodynamic behavior of the proposed streamlined box-girder suspension bridge for the Great Belt Link....

A California Tower: Response to Seismic Forces
First Interstate World Center is a signature building for the city of Los Angeles. The granite clad tower with its serrated facade rises 1,018 ft. above street level. It is the tallest...

Seismic Behavior of High Strength Concrete Columns
Information on the ductility of high strength columns in seismic areas has been scarce. The available information is based mainly on small test columns subjected to monotonic concentric...

Seismic Vulnerability and Upgrading of Nonductile Reinforced Concrete Frames Using Passive Supplemental Dampers
The effects of vulnerable details of lightly reinforced concrete frames constructed prior to the 1970s is evaluated from tests conducted of two beam/slab/column subassemblages drawn from...

High-Strength Concrete Joints Under Cyclic Loading
This experimental investigation was undertaken to check the validity for high-strength concrete beam-column joints of recommendations made by ACI-ASCE (American Concrete Institute-American...

Seismic Strengthening of Johnstown Tank in Lakeside, California
Seismic overturning moments exerted on liquid storage tanks may be resisted by a system of anchor bolts if the shell could be adequately anchored to its base, or by allowing the base plate...

 

 

 

 

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