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Full-Text Articles in Engineering

Post-Earthquake Reconnaissance Report On Transportation Infrastructure Impact Of The February 27, 2010, Offshore Maule Earthquake In Chile, Wen-Huei Phillip Yen, Genda Chen, Ian G. Buckle, Tony M. Allen, Daniel E. Alzamora, Jeffrey Ger, Juan G. Arias Oct 2011

Post-Earthquake Reconnaissance Report On Transportation Infrastructure Impact Of The February 27, 2010, Offshore Maule Earthquake In Chile, Wen-Huei Phillip Yen, Genda Chen, Ian G. Buckle, Tony M. Allen, Daniel E. Alzamora, Jeffrey Ger, Juan G. Arias

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This report documents the findings and lessons learned from the February 27, 2010, M8.8 offshore Maule earthquake in Chile. Fewer than 0.15 percent of the bridges in Chile's inventory, most built after 1995, collapsed or suffered damage that rendered them useless. Many spans of precast prestressed discontinuous girder bridges with continuous decks fell off their supports, probably due to significant in-plane rotation of the superstructure as a result of severe shaking. Lateral steel stoppers used to provide both vertical and lateral restraints on girders were largely unsuccessful due to their inadequate connection detail to cap beams and abutments. Reinforced concrete …


China Earthquake Reconnaissance Report: Performance Of Transportation Structures During The May 12, 2008, M7.9 Wenchuan Earthquake, Wen-Huei Phillip Yen, Genda Chen, Mark Yashinski, Youssef M.A. Hashash, Curtis J. Holub, Kehai Wang, Xiaodong Guo Oct 2011

China Earthquake Reconnaissance Report: Performance Of Transportation Structures During The May 12, 2008, M7.9 Wenchuan Earthquake, Wen-Huei Phillip Yen, Genda Chen, Mark Yashinski, Youssef M.A. Hashash, Curtis J. Holub, Kehai Wang, Xiaodong Guo

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This report documents the lessons learned from damage caused in the May 12, 2008, M7.9 earthquake in Wenchuan County, China. The damage to the 14 observed bridges reminded the researchers of damage suffered during the 1971 San Fernando Earthquake in California. The bridges had few seismic details such as long seats, large shear keys, or tightly spaced transverse reinforcement. Most arch and girder bridges collapsed due to surface rupturing of the seismic faults in the Longmen-Shan thrust zone. A significant portion of roadways and bridges were pushed away or buried by landslides in the steep slopes of mountainous terrain. Damage …


Calibration Of Load And Resistance Factors In Lrfd Foundation Design Specifications, Zuocai Wang, Genda Chen, Oh-Sung Kwon, Sarah Orton Feb 2011

Calibration Of Load And Resistance Factors In Lrfd Foundation Design Specifications, Zuocai Wang, Genda Chen, Oh-Sung Kwon, Sarah Orton

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This report summarizes the findings and recommendations on the impact of foundation settlements on the reliability of bridge superstructures. As a collaborative effort of an overall initiative for the development of LRFD foundation design specifications, this study is focused on the investigatio of pros and cons for including foundation settlements in bridge designs under gravity loads. Settlement was modeled both probabilistically and deterministically. In the case of a random settlement variable, a lognormal distribution was used in reliability analysis with a fixed coefficient of variation of 0.25. Dead and live loads were modeled as random variables with normal and Gumbel …