详情

Site-Specific Ground Motion Analyses for Transportation Infrastructure in the New Madrid Seismic Zone

项目名称：	Site-Specific Ground Motion Analyses for Transportation Infrastructure in the New Madrid Seismic Zone
摘要：	Only a few states in the nation have areas with higher earthquake design ground motions than northeast Arkansas. These extreme seismic forces directly control the exceedingly high costs for bridges, retaining walls, and pile foundations in this area. The main objective of this study is to develop guidelines that design engineers can use to perform high-quality, site-specific ground motion response analyses for transportation infrastructure in the New Madrid Seismic Zone (NMSZ). This research will focus on developing guidelines for conducting nonlinear, effective stress analyses with particular attention given to providing recommendations for: (1) proper dynamic soil properties (i.e., small-strain shear wave velocity profiles, and strain-Dependant modulus and damping curves) for typical NMSZ soils, (2) selecting and scaling ground motion time histories, and (3) appropriate, cheap or freely-available software to conduct the analyses. This research has the potential to benefit not only those involved in the design and construction of transportation infrastructure in the state of Arkansas, but also those from other states within the NMSZ (e.g., Tennessee, Missouri, Kentucky). From a technical perspective, further research is needed in this area to fully understand how these unique soil conditions will affect seismic forces transferred to structures during a large earthquake. From an economic perspective, it is very beneficial to investigate something that would allow one to potentially save a great deal of money on seismic design. The fact is that among all possible load combinations, seismic forces govern the design of transportation infrastructure within the NMSZ. These seismic forces are large (i.e., expensive to design for), but also uncertain. The code allows these seismic forces to be reduced by up to 33% if detailed site-specific ground response analyses reveal it is possible. The proposed research is highly applicable and valuable to the United States Department of Transportation (USDOT) and all state departments of transportation (DOT's) in the NMSZ.
状态：	Completed
资金：	88592.00
资助组织：	Research and Innovative Technology Administration
执行机构：	University of Arkansas, Fayetteville
开始时间：	20110701
实际结束时间：	20120630
主题领域：	Data and Information Technology；Geotechnology；Highways；Planning and Forecasting；Security and Emergencies