Blog - midas Bridge | Prestressed Concrete

Elongation Control to Prevent Issues in Prestressed Concrete Bridges

midasBridge TeamMay 18, 2022

MIDAS CIVIL Bridge Design Prestressed Concrete Bridge Insight Structural Design Bridge Construction Prestressed Concrete Bridges Elongation of Tendons Elongation Tolerance Postensioned Concrete Structural Assesment Elongation of Cables Estimated Elongation

Elongations of Prestressing Steels

When we build prestressed concrete structural members, which is a frequently used material for bridges worldwide, the benefit in material savings and reduction of dimensions is guaranteed only when it is built correctly. Structures behave the way they are built, and not the way they are designed, so it is imperative that the designer and reviewer engineers provide the necessary information so that the construction process is oriented towards a structure that meets all safety requirements.

Figure.1 Bridge span and length

In this article, we present, in a concise way, the reasons why the elongations of prestressing steels in bridges should be controlled, and in the end, we provide a comparison of a real case in contrast to what is obtained from numerical modeling. Also, you can download a spreadsheet template (Click here) for the manual calculations of the friction loss and elongations that you can use to compare with the reliable results of midas Civil.

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Why are the Losses of Prestressed Concrete Given by the Software not Match the Manual Calculations?

midasBridge TeamFebruary 4, 2021

MIDAS CIVIL Prestressed Concrete Construction Stage Tips & Tutorials Precast Concrete Bridges Structural Analysis Time Dependent Losses Elastic Shortening

Prestress does not remain constant with time. Prestress loss is nothing but the reduction of initial applied prestress loss to an effective value. Loss of prestressing affects the strength of members and also significantly affects the member’s serviceability. Prestress loss is classified into two types:

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Prestress Tendon Profile Layout Considering Real Construction

midasBridge TeamDecember 1, 2020

Prestressed Concrete Bridge Insight Precast Concrete Bridges Tendon Profile Arrangement FEM Analysis Tensile Stress

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Transverse Analysis of PSC Box Girder in Cable-Stayed Bridge

midasBridge TeamMarch 26, 2020

MIDAS CIVIL Prestressed Concrete Transverse Analysis Project Tutorial Cable Stayed Bridges Boundary Conditions Bridge Modeling

Please fill out the Download Section (Click here) below the Comment Section to download the Full Webinar PDF File

In this webinar, we will follow a step-by-step modeling example for the transverse analysis using various functions in midas Civil. Additionally, we will provide information about the usage and meaning of each function.

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