May 30, 2006

Update on Slip and Wear in Multi-Layer Azimuth Track Systems

By: Joseph Antebi, Juneja, Gunjeet, Frank Kan

Abstract: Many antennas, such as the 100-m Green Bank Telescope, use a wheel-on-track system in which the track segments consist of wear plates mounted on base plates. The wear plates are typically 2 to 3 inches thick and are case hardened or...

May 30, 2006

Preserving Richmond's Leigh Street Armory

Abstract: Built circa 1895 and listed on the state and national registers of historic buildings, the First Virginia Volunteers Battalion Armory, also known as the Leigh Street Armory, is the oldest armory building standing in Virginia. Simpson...

May 30, 2006

Reconstructing the Bernie King Pavilion

Abstract: The Massachusetts Department of Conservation and Recreation (DCR), formerly the Metropolitan District Commission (MDC), is charged with maintaining the Bernie King Pavilion. Built in the late nineteenth century, this open timber...

May 30, 2006

The ATC-58 project: Development of next-generation performance-based earthquake engineering design criteria for buildings

Abstract: Under sponsorship of the Federal Emergency Management Agency, the Applied Technology Council is engaged in a multi-year effort to develop next-generation performance-based seismic design criteria. The criteria will be applicable to the...

May 30, 2006

Wind vibration analyses of giant magellan telescope

Abstract: The Giant Magellan Telescope (GMT) will be a 21.5-m equivalent aperture optical-infrared telescope located in Chile. The segmented mirror surface consists of seven 8.4-m diameter mirrors. The telescope structure will be inside a...

April 29, 2006

The Role of the NEHRP Provisions in Supporting Seismic Design Provisions in Building Codes and Standards

Abstract: For more than 20 years, the Building Seismic Safety Council, under the sponsorship of the Federal Emergency Management Agency, has developed, maintained and updated the National Earthquake Hazard Reduction Program Provisions for...

April 29, 2006

100 Years of Earthquake Engineering - Lessons Learned and Forgotten

By: John Meyer, Ronald Hamburger

Abstract: During the 100 years since the 1906 San Francisco earthquake engineers have learned to design buildings that will perform well in earthquakes and to do it with a reasonable level of confidence. However, through forgetting lessons...

April 29, 2006

ATC-58 Project Overview: Development of Next-Generation Guidelines for Performance-Based Seismic Design of Buildings

Abstract: Design procedures for seismic resistance contained in building codes are intended to enable buildings to provide acceptable levels of performance in earthquakes, but the procedures are not truly performance-based. These procedures...

April 29, 2006

The performance of steel-frame buildings with infill masonry walls in the 1906 San Francisco earthquake

By: Ronald Hamburger, John Meyer

Abstract: Following the great 1906 San Francisco earthquake and fire, engineers recognized the superior performance of buildings with complete vertical load-carrying steel frames and infill masonry walls. These buildings were noteworthy in their...

April 29, 2006

Comparative seismic performance of four structural systems

By: Ronald Mayes, Craig Goings, Stephen Harris, Naguib, Wassim I.

Abstract: This paper provides a comparison of the maximum inter-story drifts and floor response spectra of both a three and nine story building each with four different steel structural systems - moment frame, buckling restrained braced frame,...