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girder systems. I-girder and box shaped members are covered. Bracing for other types of bridges, such as truss, arch or towers is not specifically addressed; however much of the information included in this volume may be applicable. Bracing systems serve a number of important roles in both straight and horizontally curved bridges.
8 gru 2020 · The bridge is a three-span steel composite I-girder bridge with a total length of 206.5m. The main span is 73.5m long and the side spans are 66.5m long. This bridge is supported by abutments at both ends and two large piers with 8 piles each between spans.
Reducing the number and complexity of cross-frames can have a significant impact on the speed of fabrication, speed of erection, and overall bridge cost. Lean-on bracing represents a way to do just that and potentially eliminate 50% or more of the full cross-frames required for a routine steel I-girder bridge without adding any cost to the girders.
Bracing systems serve a number of important roles in both straight and horizontally curved bridges. The braces provide stability to the primary girders as well as improving the lateral or torsional stiffness and strength of the bridge system both during construction and in service.
This module discusses the design of bracing systems for the superstructures of straight and curved girder systems. I-girder and box shaped members are covered. Bracing for other types of bridges, such as truss, arch or towers is not specifically addressed; however much of the information included in this module may be applicable.
The Lean-On Bracing System mainly consists of struts that transfer forces to one or two cross-frames at each brace location. Improved structural efficiency is possible by utilizing lean-on concepts in which several girders can be braced across the width of the bridge by a single cross-frame.
1 lis 2012 · The module provides: a) an overview of bracing utilized for I-girders is covered, b) a discussion of the bracing systems for tub girders, c) design requirements for the members and connections of bracing systems.
