A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Railing Design for New Truss Bridges
Several new truss bridges are planned throughout the state. Currently, the bridge railing proposed for these structures consists of a standard Texas Department of Transportation (TxDOT) railing, the T101, which is supported by a cast-in-place concrete deck. TxDOT would prefer to have the option to support a bridge rail system from the truss members in lieu of supporting the railing from the concrete deck. The primary advantage of using a truss-supported bridge rail is to allow alternate types of deck. One disadvantage to using a truss-supported bridge rail is the bridge structure must be adequately designed to resist the crash loads imparted from the bridge rail directly to the truss members. The purpose of this project was to design a bridge railing system and develop design criteria that can be used on steel truss bridges. A new truss-mounted bridge rail and railing loading criteria were developed for this project to be used on new truss bridges. The new bridge rail design developed for this project meets the strength requirements of National Cooperative Highway Research Program (NCHRP) Report 350 Test Level 3 and was designed to attach to vertical truss members. The bridge rail system can be used on spans up to and including 20 ft between supporting truss members and incorporates the use of crushable pipe blockouts that limit concentrated forces applied to the truss members. In addition, reactions from the impact loads applied to the truss members from the crushable blockouts are provided in this report and can be used by the bridge designer to design the bridge truss members.
Railing Design for New Truss Bridges
Several new truss bridges are planned throughout the state. Currently, the bridge railing proposed for these structures consists of a standard Texas Department of Transportation (TxDOT) railing, the T101, which is supported by a cast-in-place concrete deck. TxDOT would prefer to have the option to support a bridge rail system from the truss members in lieu of supporting the railing from the concrete deck. The primary advantage of using a truss-supported bridge rail is to allow alternate types of deck. One disadvantage to using a truss-supported bridge rail is the bridge structure must be adequately designed to resist the crash loads imparted from the bridge rail directly to the truss members. The purpose of this project was to design a bridge railing system and develop design criteria that can be used on steel truss bridges. A new truss-mounted bridge rail and railing loading criteria were developed for this project to be used on new truss bridges. The new bridge rail design developed for this project meets the strength requirements of National Cooperative Highway Research Program (NCHRP) Report 350 Test Level 3 and was designed to attach to vertical truss members. The bridge rail system can be used on spans up to and including 20 ft between supporting truss members and incorporates the use of crushable pipe blockouts that limit concentrated forces applied to the truss members. In addition, reactions from the impact loads applied to the truss members from the crushable blockouts are provided in this report and can be used by the bridge designer to design the bridge truss members.
Railing Design for New Truss Bridges
W. F. Williams (author) / C. E. Buth (author) / W. L. Menges (author)
2004
pages
Report
No indication
English
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