ATC Announces Workshop on Evaluation and Repair of Earthquake Damaged Concrete and Masonry Wall Buildings

NEWS RELEASE
April 22, 1997

For More Information, Contact:
650-595-1542
This email address is being protected from spambots. You need JavaScript enabled to view it.

Applied Technology Council (ATC) is pleased to announce the ATC-43 Workshop on Evaluation and Repair of Earthquake Damaged Concrete and Masonry Wall Buildings, to be held June 13, 1997 in Los Angeles. The Workshop will provide participants with an opportunity to review and comment on evaluation and repair procedures currently being developed under the ATC-43 project. The program will include overviews of the procedures and example applications. The intended audience for the workshop includes practicing structural engineers and other design professionals, building officials, government agency representatives, and others involved with the evaluation and repair of earthquake damaged buildings.

The ATC-43 project has evolved from the recognition that there has been no generally accepted procedure to evaluate the loss attributable to structural damage for individual buildings following strong earthquake-induced ground shaking. Most engineers, when faced with this question, have attempted to relate the magnitude and extent of the observed damage (i.e. crack width and length in masonry or concrete) to loss of force capacity for individual components and the overall building. There is considerable disagreement over the interpretation of damage and skepticism regarding loss of strength as a meaningful parameter.

The ATC-43 procedures are performance based and will enable design professionals to quantify loss by comparing the anticipated performance of the damaged building subject to future ground shaking to that anticipated for the undamaged building. The scope of the project includes concrete and masonry bearing wall and infilled frame structures. The procedures rely on nonlinear static analysis ("pushover analysis") to relate global response to individual structural components. Modifications to individual force/displacement relationships for structural components reflect the effects of observed damage. The procedures include a simplified direct method to determine performance restoration repairs for many cases.

The Federal Emergency Management Agency (FEMA) initiated and funded this project through the Partnership for Response and Recovery (PaRR), a joint venture of Dewberry & Davis of Arlington, Virginia, and Woodward-Clyde Consultants.

The Workshop will be held from 9:00 am to 5:00 pm at the Wyndham Hotel at Los Angeles International Airport, 6225 West Century Boulevard. For additional information about the Workshop, including registration information, contact Applied Technology Council, 555 Twin Dolphin Drive, Suite 550, Redwood City, California 94065 (Phone: 415/595-1542; Fax 415/593-2320; E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.).

Welcome to the ATC Team!

Michael Valley

As a former Principal at Magnusson Klemencic Associates in Seattle, Mike Valley comes to ATC with more than 30 years of structural engineering experience in new design, evaluation and retrofit of existing buildings, applied research, and codes and standards development. Mike’s design experience includes the landmark Salesforce Tower in San Francisco, and his research and development experience includes the FEMA 356 Prestandard and Commentary for the Seismic Rehabilitation of Buildings, FEMA P-2012 Assessing Seismic Performance of Buildings with Configuration Irregularities (ATC-123 Project), and NIST GCR 10-917-9 Applicability of Nonlinear Multiple-Degree-of-Freedom Modeling for Design (ATC-76-6 Project).

Mike also has extensive experience as an ATC consultant serving as a reviewer, a technical contributor, and Project Director on multiple ATC projects. We look forward to how Mike’s unique experiences as a successful team member will contribute to ATC projects in the future.

Michael Mahoney

Retired from federal service as a Senior Geophysicist with the Federal Emergency Management Agency (FEMA), Mike Mahoney comes to ATC with more than 30 years of experience in hazard mitigation program management and policy development, post-disaster response and recovery, and problem-focused research and development in support of FEMA’s efforts under the National Earthquake Hazards Reduction Program (NEHRP). He has led FEMA’s earthquake-related work with the International Code Council and has been involved with the development of national model codes and standards since 1984.

In his career at FEMA, Mike has led the development of countless major FEMA publications, including: FEMA 350 Recommended Seismic Design Criteria for New Steel Moment-Frame Buildings and its series of companion reports (ATC-41 Project series), FEMA P-58 Seismic Performance Assessment of Buildings, Methodology and Implementation (ATC-58 Project series), FEMA P-695 Quantification of Building Seismic Performance Factors (ATC-63 Project), FEMA P-2018 Seismic Evaluation of Older Concrete Buildings for Collapse Potential (ATC-78 Project), and FEMA P-2090/NIST SP-1254 Recommended Options for Improving the Built Environment for Post-Earthquake Reoccupancy and Functional Recovery Time (ATC-137 Project). With Mike’s extensive knowledge of federal government programs, and past collaboration with state and local agencies, hazard mitigation partners, and code development organizations, we look forward to how his unique experiences will help serve ATC’s client needs and objectives in the future.