Automated Design of Continuous Bridges with Precast Prestressed Concrete Beams

Automated Design of Continuous Bridges with Precast Prestressed Concrete Beams
Author: Harry L. Jones
Publisher:
Total Pages: 175
Release: 1974
Genre: Continuous bridges
ISBN:

A Computer program has been developed in this study to perform the calculations for the design of continuous prestressed concrete bridge girders. The continuous girder is constructed from simple span precast concrete I-shaped beams made continuous by supplementary reinforcing in the deck and the ends of the precast beams. Specifications for the designs produced are those currently accepted by the State Department of Highways and Public Transportation. This volume of the report contains a description of the computer program, instructions for its use and information on its structure and operation.

Automated Design of Continuous Bridges with Precast Prestressed Concrete Beams

Automated Design of Continuous Bridges with Precast Prestressed Concrete Beams
Author: Harry L. Jones
Publisher:
Total Pages: 51
Release: 1974
Genre: Continuous bridges
ISBN:

A computer program to compute shear and moment envelopes for continuous beams has been written. The program, which was originally written as a subroutine for a continuous beam design program, handles a number of different live and dead loads. Included among these is an axle train (vehicle with up to 15 arbitrarily spaced wheels) which can be used to study the effects of overloaded or unusual vehicle configurations. A standard input form is used and the degree of detail of the output is user specified.

Design and Construction Integration of a Continuous Precast Prestressed Concrete Bridge System

Design and Construction Integration of a Continuous Precast Prestressed Concrete Bridge System
Author: Subha Lakshmi Kumar Roy
Publisher:
Total Pages:
Release: 2013
Genre:
ISBN:

An effective, viable design solution for the elevated viaduct guideway for Universal Freight Shuttle (UFS) system championed by Texas Transportation Institute (TTI) is presented. The proposed precast elevated UFS bridge system is analyzed for the operational vehicular loading as provided by TTI and a number of design alternatives for the various bridge components are provided. These includes: the design of the fully precast deck panels for long continuous spans, design of the shear connectors resisting interface shear at bridge deck-girder interface, design of structurally efficient and cost-effective trough girders and its design alternative with I-girders, and economic and long-term serviceable design of bridge piers. A literature review and study of the existing precast bridges is presented for the state-of-the-art and practice, design specifications and publications by AASHTO, State Department of Transportation and other agencies. These existing systems are refined to determine the most appropriate specification for the proposed bridge components by integrating the planning, design, fabrication and construction techniques to ensure high precision freight shuttle movement, construction feasibility, safety, life-cycle cost, durability and serviceability requirements. The design concept presented is a deviation from the conventional railways and highways design. The best practices and specifications of AASHTO and AREMA are combined suitably in this research to suit the major requirements of the project. A combination of the design philosophy with appropriate construction techniques has been blended to devise a system which is efficient for offsite manufacture of components for construction of the bridge and adaptable to the different bridge configurations. Based on the design results, it is found that precast concrete deck panels in combination with precast, prestressed concrete trough girders provides the most efficient superstructure solution for this project. The Damage Avoidance Design for the precast bridge piers along with the precast superstructure provides a system with comparable structural performance along with other benefits such as long term serviceability, economical sections, practically transportable units, modular simplicity for relocation as desired and ability to offer space for commercial usage. The steps for construction of the bridge is schematically presented and sequentially explained. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/150928