原文传递
Railing Design for New Truss Bridges.
| 题名： | Railing Design for New Truss Bridges. |
| 作者： | williams, w. f. buth, c. e. menges, w. l. |
| 关键词： | *Truss-bridges; *Railings-; *Design-.;Design-criteria; Bridge-decks; Loads-Forces; Strength-Mechanics. |
| 摘要： | 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. |
| 报告类型： | 科技报告 |
相关文献
- Project Summary Report: Truss Bridge Retrofit Railings. Project summary report.
- Retrofit Railings for Truss Bridges.
- Seismic Design of Non-Conventional Bridges: A Synthesis of Highway Practice.
- Best Practices for the Rehabilitation and Moving of Historic Metal Truss Bridges.
- Best Practices for the Rehabilitation and Moving of Historic Metal Truss Bridges
- Fatigue Evaluation of the Deck Truss of Bridge 9340.
检索历史
应用推荐
