Elongation Control to Prevent Issues in Prestressed Concrete Bridges

midasBridge TeamMay 18, 2022

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.

 
 

Guidelines for Aesthetic Bridge Design

midasBridge TeamOctober 13, 2021

Guidelines for Aesthetic Bridge Design

 

Design Considerations for Arch Bridges

midasBridge TeamMay 19, 2021

Design Considerations for Arch Bridges

 

PSC Segmental Box Girder Bridge Design

midasBridge TeamMay 14, 2021

 

Concepts of Plastic Hinging and Pushover Analysis with midas Civil

midasBridge TeamApril 23, 2021

 

Why is Bridge Information Modeling (BrIM) Important in Today's Bridge Industry?

midasBridge TeamApril 21, 2021

The Next Civil Engineering Standard

Static Analysis of Cable-Stayed Bridges

midasBridge TeamMarch 4, 2021

 In July 2020,  we hosted a webinar, “How I Design Bridges : Static Analysis of Cable-Stayed Bridges" by Sam Li, Senior Structural Engineer/CaSE Design, Australia.

Fundamentals of Soil Structure Interaction Analysis for Integral Bridges

midasBridge TeamMarch 4, 2021

 

Design of Warren Truss Steel Footbridge

midasBridge TeamJanuary 19, 2021

This case study covers the following aspects:

Top 5 Most Incredible Bridges in the World

midasBridge TeamJanuary 14, 2021

1.The Danyang-Kunshan bridge, China | CRBC

The Danyang-Kunshan bridge in China is considered the world’s longest bridge with a length of 164.8 kilometers. The bridge connects two very large cities in China, Shanghai and Nanging. The Danyang-Kushan bridge also connects Danyang and Kunshan in the section of the Beijing-Shanghai High-Speed Railway that connects the Beijing West Station and Shanghai Hongqiao Station. During its construction, it took almost 10,000 construction workers to complete this engineering feat, which made the completion of the construction possible in only 4 years. One notable part of the Danyang-Kunshan bridge is its 9km long section that spans over Yangcheng Lake. This particular section required at least 2,000 pillars to support it. This massive structure required 450,000 tons of structural steel, making it a very sturdy structure. The sturdiness of the bridge allows it to withstand massive natural disasters such as typhoons and earthquakes of magnitudes reaching 8 on the Richter scale. Furthermore, the bridge is also able to withstand the impacts from naval vessels that weigh up to 300,000 tons. Furthermore, since the bridge had to function for a high-speed train, the design speed was an important factor to take into consideration. Depending on the type of train, the maximum speed of the railways varies from 250km/h to 350km/h. However, for the Danyang-Kushan bridge, the railway line of the bridge had to be designed for an operating speed of 350km/h and a maximum speed of 380 km/h due to its busy hours.

Definition and Calculation of Prestressed Concrete Bridge Camber Considering Real Construction

midasBridge TeamJanuary 5, 2021

1. Definition and meaning of Camber


In the dictionary, Camber is defined as "a raised surface or a member raised upward." In other words, it means ‘to bend higher than the original/target shape’.

Top 5 New Advanced Technologies for Bridge Design

midasBridge TeamDecember 29, 2020

Top 5 New Advanced Technologies for Bridge Design and Construction

 

Application of Links in Bridge FE Models

midasBridge TeamDecember 23, 2020

 

Three-Span Steel Composite I-Girder Bridge Design

midasBridge TeamDecember 8, 2020

 

Design of Girder Span Bridge with PSC Sections

midasBridge TeamApril 20, 2020

A girder bridge is one of the most common types of bridge design. Prestressing a composite girder in the negative moment region increases its stiffness by preventing cracking of concrete under service loads. In this webinar, we share the design practices of girder span bridges in Sarawak and show which functions of midas Civil can be utilized for the effective modeling of this type of structure.