Construction Stage Analysis of Composite Girder Bridges in midas Civil

Nowadays, bridge designers not only consider non-composite and composite action but also long-term creep and shrinkage with the effective modular ratio of n. Bridge engineers need a software that automatically calculates and considers section properties in each construction sequence for accurate analysis results...

Determining Concurrent Live Load for Strut and Tie Models

In the article "strut-and-tie modeling for pier caps", we have discussed the definition of strut-and-tie analysis and how to construct a strut-and-tie model using the example of pier cap. After creating the geometry of a strut-and-tie model, the next step usually is calculating dead and live loads from the superstructure. This article discusses how to determine the boundary loads for a pier cap with a superstructure that has irregular geometries.

How to Perform Time-dependent Analysis

Mainly there are two ways to perform the time-dependent analysis. One is the time-step analysis and the other is the age-adjusted method. The age-adjusted method is a simplified one and can consider the long-term effects with only a one-step analysis. Of course, this is an approximate way to consider the long-term effects, but the creep itself is an approximation anyway. The results from the age-adjusted method are reasonable in many cases.

Analysis and Modeling Considerations for Truss Bridges

In this workshop session, Sofia Puerto, Bridge Engineer and our Top Expert Engineer Daniel Baxter, Bridge Department Manager and Project Manager at Michael Baker International presented on the analysis and modeling considerations for truss bridges using midas Civil. 

Constructability Of Curved Steel Tub Girders

Seth Greenberg, P.E. from Jacobs, presented the lesson about Constructability of Curved Steel Tub Girders. Tub girders had the complex geometry which was difficult to fabricate. Engineers determined to use tub girders due to its higher torsional rigidity. Seth Greenberg explained the reason for using tub girders, the nuances between different model types, and introduced his favorite features...

Elkhorn Drop Ramp Structure Lessons Learned

Percy Penafiel, P.E. from Nevada Department of Transportation, will be going over the lessons and process of the Elkhorn Drop Ramp Structure. When it comes t complex geometry many engineers struggle while using grillage approach or using plate modeling. That was the issue that some engineers at Nevada DOT  were facing, until Percy was able to use...