详情

Rapid Retrofitting Techniques for Induced Earthquakes

项目名称：	Rapid Retrofitting Techniques for Induced Earthquakes
摘要：	Since 2009, there has been a dramatic increase in the number of earthquakes in the central United States. States such as Oklahoma, Kansas, Arkansas, and Texas have not historically experienced earthquakes at the rate currently observed, nor of this magnitude. Studies have linked the increased rate of seismic activity since 2009 to wastewater injection in disposal wells. These induced earthquakes are not limited to the U.S., but are also experienced in other countries including Canada, China, and the United Kingdom. The seismicity of places such as California and the New Madrid seismic zone is well documented and generally thought of when discussing seismic hazards in the contiguous U.S., yet the cumulative moment in Oklahoma over the last two years (1 January 2015 to 31 December 2016) exceeds that of southern California and the New Madrid seismic zones. While collapse is unlikely for the induced earthquakes currently observed, the cumulative effects of a large number of small earthquakes on bridges are not fully understood. These cumulative effects compounded with the occasional moderate earthquake (M5.0 and larger) may lead to damage requiring rapid repairs to avoid acute traffic control issues at the affected bridge sites. To reduce impacts to the driving public, accelerated bridge construction (ABC) techniques have been developed over recent years, but have primarily focused on rapidly constructing new or replacement structures. Another benefit derived from these ABC methods is rapid post-earthquake repair of damaged structures. Post-earthquake accelerated column repair/replacements has focused solely on moderate-to-high seismic zones. The need for additional analysis, new techniques, and associated specifications is also critical for low-to-moderate seismic zones affected by induced earthquakes. This project addresses the current knowledge gap on the effects of low-level frequent seismic events on bridges, as well as ABC methods to repair/retrofit damaged bridges.
状态：	Completed
资金：	76155
资助组织：	Office of the Assistant Secretary for Research and Technology
管理组织：	Accelerated Bridge Construction University Transportation Center (ABC-UTC)
项目负责人：	Azizinamini, Atorod
执行机构：	Accelerated Bridge Construction University Transportation Center (ABC-UTC)
主要研究人员：	Muraleetharan, Kanthasamy K
开始时间：	20180101
预计完成日期：	20190731
实际结束时间：	20200101