原文传递
Effects of Boundary Conditions on Bridge Performance; Final rept. 8 Sep 97-1 Nov 99
| 题名： | Effects of Boundary Conditions on Bridge Performance; Final rept. 8 Sep 97-1 Nov 99 |
| 作者： | Yazdani, N.; Green, T. |
| 关键词： | Highway bridges; Precast concretes; Bearings; Performance tests; Elastometers; Shrinkage; Girder bridges; Structural analysis; Florida; Temperature effects; Skewness; Loads(Force); Stiffness; Heavy trucks; Deflections |
| 摘要： | Reinforced elastomeric bearing pads generally support precast concrete bridge girders. The conditions of these bearing pads and the pad-bridge interface define the support boundary conditions of the bridge superstructure. The interface between bearing pads and bridge girders affect the performance of the superstructure and the substructure. The pads are designed to carry vertical loads, and to accommodate horizontal movements of the bridge girders. The objectives of this study were to determine the effects of various parameters on the bridge superstructure performance and to compare the girder performance with simple support conditions corresponding to the current FDOT design. A parametric study on the interaction of the support boundary conditions and bridge girders was performed in this study. Some of the parameters included; the skewness of the bridge, the presence of intermediate diaphragms, and the temperature effects on the bridge superstructure. A finite element model of a bridge superstructure containing Florida Bulb Tee 78 girders was created using ANSYS software. This model was subjected to an HL93 truck load as pertaining to LRFD AASHTO specifications. The results indicate that pads with higher bearing stiffness are beneficial to bridges with higher skew angles. Intermediate diaphragms have the positive effect of reducing the overall midpoint deflections and maximum stresses for the bridge system. However, the reductions in deflections and stresses are smaller for increasing skew angles. |
| 总页数： | 72p |
| 报告类型： | 科技报告 |
相关文献
- Development of User Cost Data for Florida's Bridge Management System; Final rept. 4 Sep 97-1 Dec 99
- Effects of Boundary Conditions on Bridge Performance
- Remote Sensing Survey for the Grand Isle Re-Evaluation Study and the Dredging of the Bayou Rigaud and Marsh Creation Areas, Jefferson Parish, Louisiana.
- Compilation and Evaluation of Results From High-Performance Concrete Bridge Projects, Volume I: Final Report.
- Compilation and Evaluation of Results From High-Performance Concrete Bridge Projects, Volume II: Appendixes.
- Boundary Conditions for Bridge Scour Analysis; Final rept. 1 Jul 96-30 Jun 98
检索历史
应用推荐
