Effect of First-Story Shearwalls on Earthquake-Resistant Buildings
A Practical system for earthquake-resistant building design is described. The system utilizes Teflon sliders at the top of the first story framed shearwalls to carry a portion of the superstructure....
Damage Assessment for Reinforced Concrete Buildings with Shear Walls
This paper tries to establish the analytical method of damage assessment for R.C. buildings with shear walls before or after earthquake. Incremental nonlinear spectrum analysis, using...
Welded Wire Confinement Grids
The invention of a new way to reinforce concrete using high strength welded wire grids, (WWG) increases its earthquake resistance by improved ductility and also opens the way for vast...
Seismic Strengthening of R/C Columns Using Steel Jackets
This paper presents experimental results on the use of steel collars and steel jackets as a retrofitting system to improve the seismic performance of short rectangular reinforced concrete...
Use of Eccentric Steel Bracing for Strengthening of R/C Frames
This paper presents preliminary results of ongoing research investigating the feasibility of steel eccentrically braced frames (EBFs) for seismic retrofit of reinforced concrete frames....
Code Provisions for Unreinforced Masonry Bearing Wall Buildings in California
Prior to the Long Beach earthquake of 1933, unreinforced masonry (URM) construction was usual in California, as it still is in many areas of the United States. The poor performance of...
CenterCore Strengthening System for Seismic Hazard Reduction of Unreinforced Masonry Bearing Wall Buildings
The CenterCore technique of reinforcing unreinforced masonry walls was developed with the help of a National Science Foundation grant in 1984. The CenterCore strengthening system consists...
Seismic Retrofit of Building Structures with Unreinforced Masonry Infill Walls
The paper summarizes the result of an analytical study conducted by the authors concerning the evaluation of the seismic performance of buildings with unreinforced masonry infills. The...
Earthquake Strengthening of a Twelve Story Non-Ductile Concrete Frame Building with Unreinforced Masonry Using Displacement Control Criterion
The structural concern with the Cooper Arms Apartment building when subjected to ground shaking was the in-plane and out-of-plane forces on the infill and consequences of the infill resisting...
Report and Summary of ATC-31?Evaluation of the Performance of Seismically Retrofitted Buildings
Structural and damage data for seismically retrofitted buildings affected by the October 1, 1987 Whittier Narrows and October 17, 1989 Loma Prieta, California earthquakes were collected...
Dynamic Field Response Studies and Earthauqke Instrumentation of the Meloland Road Overcrossing
Ambient vibration data was obtained at the Meloland Road Overcrossing near El Centro in California by The California Department of Transportation (CALTRANS) as part of a 1978 Federal Highway...
Dynamic Soil-Foundation Interaction at the Meloland Road Overcrossing
Forced vibration tests, using a hydraulic ram device, were conducted on the Meloland Road Overcrossing (MRO) bridge over Interstate 8 near El Centro, California. Dynamic response data...
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...
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...
A Comparison of the Cyclic Performance of Bolted and Riveted Connections
As part of a larger project to investigate the performance of older steel frames, a comparative study of bolted and riveted T-stub connections was conducted. The study included connections...
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