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OTREC-RR-11-11 By Michael Scott
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A bridge management system is developed using the Tcl scripting language in conjunction with the OpenSees finite element software framework. Fully programmable and string-based, Tcl is ideal... More > for implementing live load analysis through scripts and experimenting with emergent bridge rating methodologies. Since Tcl is an interpreted language, the application also has the important advantage that new bridge capacity models and rating factor calculations can be implemented on multiple platforms without compiling source code. The network programming features of Tcl give the system access to databases for conducting internet-based bridge rating. The system is demonstrated for rating a conventionally reinforced concrete girder; however, it is readily extensible to other types of bridge components.< Less
OTREC-RR-11-11 By Michael Scott
eBook (PDF): $0.00
Download immediately.
A bridge management system is developed using the Tcl scripting language in conjunction with the OpenSees finite element software framework. Fully programmable and string-based, Tcl is ideal... More > for implementing live load analysis through scripts and experimenting with emergent bridge rating methodologies. Since Tcl is an interpreted language, the application also has the important advantage that new bridge capacity models and rating factor calculations can be implemented on multiple platforms without compiling source code. The network programming features of Tcl give the system access to databases for conducting internet-based bridge rating. The system is demonstrated for rating a conventionally reinforced concrete girder; however, it is readily extensible to other types of bridge components.< Less
OTREC-RR-11-11 By Michael Scott
eBook (PDF): $0.00
Download immediately.
A bridge management system is developed using the Tcl scripting language in conjunction with the OpenSees finite element software framework. Fully programmable and string-based, Tcl is ideal... More > for implementing live load analysis through scripts and experimenting with emergent bridge rating methodologies. Since Tcl is an interpreted language, the application also has the important advantage that new bridge capacity models and rating factor calculations can be implemented on multiple platforms without compiling source code. The network programming features of Tcl give the system access to databases for conducting internet-based bridge rating. The system is demonstrated for rating a conventionally reinforced concrete girder; however, it is readily extensible to other types of bridge components.< Less
OTREC-RR-11-11 By Michael Scott
Paperback: $6.35
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A bridge management system is developed using the Tcl scripting language in conjunction with the OpenSees finite element software framework. Fully programmable and string-based, Tcl is ideal... More > for implementing live load analysis through scripts and experimenting with emergent bridge rating methodologies. Since Tcl is an interpreted language, the application also has the important advantage that new bridge capacity models and rating factor calculations can be implemented on multiple platforms without compiling source code. The network programming features of Tcl give the system access to databases for conducting internet-based bridge rating. The system is demonstrated for rating a conventionally reinforced concrete girder; however, it is readily extensible to other types of bridge components.< Less
OTREC-RR-11-20 By Michael Scott, Minjie Zhu
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The combination of seismic and vehicle live loadings on bridges is an important design consideration. There are well-established design provisions for how the individual loadings affect bridge... More > response: structural components that carry vertical live loads are designed to remain well within the linear-elastic range while lateral load carrying components are designed to yield under large seismic excitations. The weight of the bridge superstructure is taken in to account as dead load in structural analysis for seismic loads; however, the effects of additional mass and damping of live loads on the bridge deck are neglected. To improve the design of highway bridges for multi-hazard effects of seismic plus live load, many questions arise and are addressed in this project via numerical simulations of short span bridges. Further extensions of this research can be extended to long span bridges whose seismic response is more heavily influenced by vehicle mass on the bridge deck.< Less
OTREC-RR-11-20 By Michael Scott, Minjie Zhu
Paperback: $6.50
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The combination of seismic and vehicle live loadings on bridges is an important design consideration. There are well-established design provisions for how the individual loadings affect bridge... More > response: structural components that carry vertical live loads are designed to remain well within the linear-elastic range while lateral load carrying components are designed to yield under large seismic excitations. The weight of the bridge superstructure is taken in to account as dead load in structural analysis for seismic loads; however, the effects of additional mass and damping of live loads on the bridge deck are neglected. To improve the design of highway bridges for multi-hazard effects of seismic plus live load, many questions arise and are addressed in this project via numerical simulations of short span bridges. Further extensions of this research can be extended to long span bridges whose seismic response is more heavily influenced by vehicle mass on the bridge deck.< Less
OTREC-RR-13-05 By Michael Scott, Scott Ashford, Deepak Rayamajhi
Paperback: $6.88
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Liquefaction and liquefaction induced damage in pile supported structures is seen in earthquakes around the world. The Pacific Northwest has seismic hazard conditions as a Cascadia Subduction Zone... More > (CSZ) with an expected earthquake magnitude of 9.0 (Mw) and a 300 year return period. Oregon Dept. of Transportation found thousands of Oregon bridges to be vulnerable to a CSZ earthquake, with repair and replacement costs estimated at over $1 billion. This research sought to evaluate the seismic performance of bridge foundations and liquefaction mitigation alternatives. The main objectives were to develop design charts for mitigation alternatives and to develop methodologies for assessing the performance of bridge pile foundations in laterally spreading ground. Research focuses are: 1) ground improvement methods, particularly using stone columns and deep soil mixing grids, and 2) assess the seismic performance of bridge foundations and seismic retrofitting alternatives for the bridge foundation.< Less