Response of Isolated Structures to Recent California Earthquakes
A significant amount of research and development, shake table testing computer modelling and real world applications have been performed with the seismic isolation design concept in the...

Response of Base Isolated Buildings in Japan to Recent Earthquakes
On February 2nd in 1992, more than 20 base isolated buildings in Tokyo experienced an earthquake of JMA seismic intensity 5. In this event, many acceleration records of isolated buildings...

Large-Scale Earthquake Simulator Study of the Tohoku University Base-Isolated Building
This paper describes a series of earthquake simulator tests of a 1/2.5-scale, base-isolated, three-story, reinforced-concrete building. Three different types of elastomeric seismic isolation...

Building Separation Rules to Avoid Seismic Pounding
A method to estimate the required separation to preclude pounding between adjacent buildings is presented. It accounts for the effect of yielding on the vibration phase of adjacent buildings....

Improved Torsional Analysis Procedure for Single Story Structures Subjected to Seismic Motion
An analytical procedure is developed that enables designers utilizing the UBC planar lateral force procedure to accurately account for the additional lateral response due to torsion without...

Displacement Amplification Factor for Seismic Design Provisions
To estimate the maximum roof and story drifts occurring during severe earthquakes, the UBC and NEHRP use 3Rw/8 and Cd...

Data Base for Seismis Rick Assessment in Mexico City
We describe a model to estimate expected ground motions and expected damage, based on intensity damage relations derived for 14 classes of buildings representative of Mexico City construction....

Techniques for Seismic Rehabilitation of Buildings in Mexico City
The 1985 earthquake in Mexico City caused collapse or damage of a large number of engineered buildings. After this event several hundreds of buildings were retrofitted using several techniques....

GIS Mapping of Earthquake Ground Shaking in San Francisco, California
Severe earthquakes of the last decade in Mexico, Armenia, and the United States have reemphasized the importance of local geologic site conditions in estimating damage and consequent losses....

Response of Knee-Brace-Frame Under Seismic Loading
Recently a new framing system called the Knee-Brace-Frame (KBF) has been proposed for seismic resisting structures to overcome the deficiencies of moment resisting frame and concentrically...

Seismic Upgrade Design of Buildings
Building owners and users in seismically prone areas are becoming increasingly aware of the potential risks associated with the seismically hazardous buildings in the region specially...

Seismic Condition Assessment of the San Francisco-Oakland Bay Bridge
The project summarized here was initiated at the University of California at Berkeley to study seismic behavior of the San Francisco-Oakland Bay Bridge and to develop recommendations for...

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...

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...

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...

 

 

 

 

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