EVENTS

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Past Webinar            I               Past Expert Q&A              I             Past Workshop           I            Past Expert Tips

 

Past Webinar

Contrasting SOE Design Methodologies and Implications

In this Midas Webinar Session, our Expert Engineer Parsa Heydarpour from Subsurface and Tunnel Engineering shared his knowledge on how to do a comparative analysis between three SOE Design approaches – Traditional, 3D FEA, and 2D FEA – for a conventional shaft structure, to showcase key advantages and limitations of each design

Pier Cap Design Utilizing the Strut-And-Tie Provisions of AASHTO LRFD And midas Civil

In this Midas Webinar Session, our Top Expert Engineer Daniel Baxter and Shayla Olson from Michael Baker International shared their knowledge present on pier cap designs using the strut-and-tie method and explain how to use the moving load tracer function in MIDAS and how to write nodal load definitions to the MCT program text file. 

Refined Analysis For the Optimum Design & Load Rating of Local Bridges

Dr. Yanling Leng, lead bridge engineer from IMEG, will talk about why and how she has conducted refined analyses for the optimum design & load rating of normal local bridges

Tips for Managing Data for Bridge Analysis Results

In this webinar, Zac Taylor P.E., structural engineer from Kimley-Horn, will be giving out some tips for managing data from analysis results. He will show you his way of organizing data from midas Civil output and interpret the analysis output efficiently.

Application of Links in Bridge FE Models

This webinar will include a discussion on the most commonly used types of links in bridge engineering industry. The webinar speaker, Luis Vila from GM2 Associates, will talk about the appropriate applications of various types of links in midas Civil.

Load Rating of Curved and Complex Geometry Composite Steel Bridges

Tom Less will expand the knowledge of Two-Dimensional/Grillage Modeling and Three-Dimensional Modeling and show how he sets up the inputs like rating design code, rating parameters, unbraced length, fatigue parameter, etc., for bridge rating design. 

Redundancy Analysis of twin steel box girder bridges

Demonstrating redundancy for a dual steel box girder system involves-in-depth structural analysis and may require enhancements to certain structural details.

Seismic Design of Concrete Bridges

There are differences between building a new bridge and widening or replacing an existing bridge. When you build a new bridge, there are more alternative options and fewest constraints. 

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 of MIDAS Civil for tub girder construction phases.

Elkhorn Drop Ramp Structure Lessons Learned

When it comes to 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 MIDAS Civil and MIDAS FEA to do both approaches easily. 

Soil Foundation Structure Interaction and Ground Motion Selection

Structural dynamic using the beam-spring model and non-linear time history analysis is currently recognized as one of the most accurate tools for seismic design and analysis of bridge structures.

Best Practices When Considering Post-Tensioned Girder Bridges

Continuous post-tensioned bridges are very efficient structures. By eliminating the need for deck joints, this requires less maintenance, which is a significant saving in the long-term. 

Load Testing, Evaluation, and Load Rating Of Movable Bridge

As special as movable bridges are, learning techniques from experts could help you have a broader view and more insight of your project. So we want to invite you to our live webinar with Dr. Liang.

Automation Of Refined Grillage Model For Multi-Girder Bridges

In case if you have piles of works waiting for you to return to the office, we want to recommend you to watch Dr. Lin's webinar! During the presentation, Dr. Lin will guide you through Bridge Automation that will make your current modeling & design process in Midas Civil more efficient. A must-learn-skill for MIDAS users or high-productivity-seekers!

Contrasting SOE Design Methodologies and Implications

In this Midas Webinar Session, our Expert Engineer Parsa Heydarpour from Subsurface and Tunnel Engineering shared his knowledge on how to do a comparative analysis between three SOE Design approaches – Traditional, 3D FEA, and 2D FEA – for a conventional shaft structure, to showcase key advantages and limitations of each design

Past Expert Q&A

Modeling Technique In Midas Civil

In this Q&A Live Session, our Expert Engineer, Zac Taylor from Kimley-Horn helped answer the questions from our users about the Modeling Technique in Midas Civil. For all USA engineers, you can also join our next Q&A session by signing up here 

Steel Straddle Bents

In this Q&A Live Session, our Expert Engineer, Siddharth Patil from White Hawk Engineering & Design helped answer the questions from our users about the Steel Straddle Bents in midas Civil. 

Post-Tensioned Straddle Bents

In this Q&A Live Session, our Expert Engineer, Zac Taylor from Kimley-Horn helped answer the questions from our users about the Post-tensioned Straddle Bents. 

Construction Stage Analysis of Irregular Geometry Structures

In this Q&A Live Session, our Expert Engineer, Percy Penafiel from Nevada DOT helped answer the questions from our users about the Construction Stage Analysis of Irregular Geometry Structures.

Pushover Analysis

With more users asking us questions regarding pushover analysis and its applications in midas Civil, we want to share the answers to some of these common questions to our user community. 

Construction Stage Analysis Part I

In this Q&A Live Session, our Expert Engineer, Amir Botros from SDR Engineering helped answer the questions from our users about the Construction Stage Analysis. 

Construction Stage Analysis Part II

In this Q&A Live Session, our Expert Engineer, Amir Botros from SDR Engineering helped answer the questions from our users about the Construction Stage Analysis.

Modeling Technique In Midas Civil

In this Q&A Live Session, our Expert Engineer, Zac Taylor from Kimley-Horn helped answer the questions from our users about the Modeling Technique in Midas Civil. For all USA engineers, you can also join our next Q&A session by signing up here 

Past Workshops

How to Complete a Model with a Construction Stage Analysis

In this Midas Workshop, our Expert Engineer Amir Botros from Stantec shared his knowledge about Construction Stage Analysis.  

Modeling of Composite Steel Bridges

In this Midas Workshop Session, our Expert Engineer Tom Less from Woolpert shared his knowledge about the Modeling of Composite Steel Bridges. 

How to Model Using the Composite Concrete Wizard

In this Midas Workshop Session, our Expert Engineer Zac Taylor from Kimley-Horn shared his knowledge about the composite concrete wizard and demonstrated how to use it in order to build a bridge model. 

Time-dependent Material For Prestressed Concrete Bridge Construction Staged Analysis

In this Midas Workshop Session, our Expert Engineer, Benjamin Blasen from Jacobs shared his knowledge and experience on Time-Dependent Material for Construction Stage Analysis in midas Civil

Post-Tensioned Structure Construction Staged Analysis

In this Midas Workshop Session, our Expert Engineer, Daniel Baxter from Michael Baker International shared his project experience about Post-tensioned Structure Construction Staged Analysis

Shaft Excavation With Corrugated Metal Sheets And Steel Ribs

In this Midas Workshop Session, our Expert Engineer Parsa Heydarpour from Subsurface and Tunnel Engineering shared his knowledge about Shaft Excavation With Corrugated Metal Sheets and Steel Ribs (with and without dewatering).

How to Complete a Model with a Construction Stage Analysis

In this Midas Workshop, our Expert Engineer Amir Botros from Stantec shared his knowledge about Construction Stage Analysis.  

Expert Tips

Steel Bridge Nonlinear Buckling Analysis

One of the objectives when designing structures is to prevent them from failures. Structural failure can happen when the structural elements experience stresses that are higher than their ultimate strengths. One other type of failure is buckling. Buckling is the sudden lateral deformation of the slender structure when subjected to excessive axial compressive stress. In some cases, structures fail in buckling mode before failing in compressive stresses due to the slenderness of the structural members. The phenomenon of buckling is not limited to columns. Buckling can occur in many kinds of structures and can take many forms [1]. 

Steel Bridge Nonlinear Buckling Analysis

One of the objectives when designing structures is to prevent them from failures. Structural failure can happen when the structural elements experience stresses that are higher than their ultimate strengths. One other type of failure is buckling. Buckling is the sudden lateral deformation of the slender structure when subjected to excessive axial compressive stress. In some cases, structures fail in buckling mode before failing in compressive stresses due to the slenderness of the structural members. The phenomenon of buckling is not limited to columns. Buckling can occur in many kinds of structures and can take many forms [1]. 

Steel Bridge Nonlinear Buckling Analysis

One of the objectives when designing structures is to prevent them from failures. Structural failure can happen when the structural elements experience stresses that are higher than their ultimate strengths. One other type of failure is buckling. Buckling is the sudden lateral deformation of the slender structure when subjected to excessive axial compressive stress. In some cases, structures fail in buckling mode before failing in compressive stresses due to the slenderness of the structural members. The phenomenon of buckling is not limited to columns. Buckling can occur in many kinds of structures and can take many forms [1]. 

New Modeling Approach For Tunnels Under Complex Ground and Loading Conditions

With the help of Tarcisio Barreto Celestino and Antonio Bobet, our MIDAS Expert Osvaldo Paiva Magalhães Vitali took on a new approach using midas GTS NX on tunnels with complex ground and loading conditions. In their recent publication in the Soils and Rocks Journal, we can see how they used

Modeling Steel Fracture for Redundancy Analysis Using Detailed Finite Element Method

What is Bridge Redundancy?

Bridge redundancy is the capacity of the structure to carry loads after the structure is damaged or after one of its members ruptures. The manual for Bridge Evaluation (2008) defines bridge redundancy as the “capacity of the bridge to carry loads after damage or the failure of one or more

How to Perform Time-Dependent Analysis

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

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

Strut-and-Tie Modeling for Pier Caps

What is Strut-and-Tie Analysis? What are "Struts" and "Ties" in Struct-and-Tie Analysis?

Struct-and-tie analysis visualizes the flow of forces through any type of concrete element in the form of internal truss. The tensile members of the internal truss are called "ties" and the compressive members of the internal truss are called "struts" in

Convergence Study In Curved Girder Analysis

What is Convergence? What is Convergence Study?

It is easy to obtain the result from bridge finite element analysis, but to get more accurate results requires extra efforts. Even the most robust finite element analysis solvers adopts the method that approximates the structural behavior, by minimizing the associated error function compared

Composite Bridge Modeling Tips

How to Model the Girder and Deck Connection in Composite Bridge?  

The way to simulate the connection between the girder and the deck will depend on how we construct the model. In the 2D all-frame composite bridge model shown in figure 1, all the elements are connected in the grid within the same plane. Because it was modeled with...

Nonlinearities in Cable-Stayed Bridge Analysis

Why is cable-stayed bridge difficult to analyze? Cable-stayed bridges, including so-called Extradosed bridges, do not have any classical solutions. Computer based displacement method is the only way to analyze cable-stayed bridges and it is hard to check the output. Also, in the cable-stayed bridge analysis, the following three nonlinearities should

Posting a bridge? Think about the alternatives

Bridge load posting – identifying just how much weight a bridge can bear – is a matter of public safety and a way to safeguard vital transportation infrastructure. However, load posting is less straightforward than it may seem. Not posting a bridge can create safety issues for the motoring public, while posting makes transportation more difficult for large, heavy vehicles and the industries that use them. 

Geometric Nonlinearity Explained

From the previous tip basic nonlinear analysis explained, Dr. Seungwoo Lee talked about some fundamental differences between linear and nonlinear analysis in structural engineering. In a linear analysis, the relationship between the stress and strain of a model is held constantly, and the stiffness matrix of the model stays the same throughout the analysis. 

Time Dependent Material in Time Step Method

When we talk about prestressed concrete, the things that we are mostly concerned about are the compressive strength gain with respect to time, and the prestressing tendon relaxation with respect to time. Figure 1 shows various time-dependent effects for concrete including creep and shrinkage.  The factors that affect the creep rate

Insertion Points, and Beam End Release

For structures with stability issues, one way to check which specific link is causing the problem is start with a constrained model and begin relaxing its DOFs gradually. When you are releasing the DOFs and when you are running into stability issues, you would know which link release is causing that instability. 

Types of Links in Midas Civil

This piece of tip talks about different types of links that you can find in midas Civil and their applications. You may be wondering what are the implications of using one type of link compared to another, this tip will answer that for you and help you gain more confidence when choosing the link types. 

Why Post Tensioning An Arch Bridge?

In the design project to replace the old Fulton Road arch bridge in Cleveland, OH, Michael Baker Intl engineer Daniel Baxter and his team has designed a 1,568-foot-long replacement structure for the original arch bridge, which retains the original design of six 210-foot-long concrete deck arch spans. For the replacement bridge structure, a precast, post-tensioned concrete arch bridge design was selected. You may be asking yourself, why post-tensioning the arch bridge? 

Warping Stress in Midas

In typical engineering practices, engineers are used to having six degrees of freedom (DOFs) for modeling and analysis, three for rotations and three for translation. However, additional advanced beam elements can include other DOFs to represent the warping of an open thin-walled cross section. Such elements are not commonly available in professional software.

Irregular Bridges

There are times when engineers would have to design and evaluate bridge structures that fall outside of the AASHTO design guideline. Therefore, when do we define a structure as irregular? How is evaluating an irregular bridge different from evaluating a regular bridge? How to minimize errors during the construction of irregular bridges? 

Speed Up Pre-and-Post-Processing of Analysis

Our Midas Civil software is versatile and very compatible with other software and Excel. This feature really useful to help engineers work faster on their project. Our Expert Engineer Seth Greenberg from Jacobs shared his tips to work faster with Midas Civil. 

Query Tools, MCT Command Shell, Frame&Plane Thickness

Midas Civil has so many features that can help you to work efficiently in your project. Our Expert Engineer Benjamin Blasen from Jacobs shared his quick tips in Midas Civil.  The tips/tricks he has found very useful are the Query tools, using the MCT command shell, and turning on the display of frame and plane thicknesses in the Hidden Option Display menu.

Nodes and Elements

There are so many ways to help you save your time when you are working on your bridge project. One of the easy tips is renumbering of the nodes and elements.  Our Expert Engineer Tom Less, P.E., a Senior Associate, Team Leader & Bridge/Structural Engineer from Woolpert shared his tips for nodes and elements. 

Complex Bridge

A complex bridge is one of the most common engineering projects nowadays. This category of structures includes movable, cable-stayed, segmental concrete, and other bridges with unusual characteristics. These types of structures will require specialized expertise to design and build. One of our Expert Engineers, Yazeed Abuhassan, a Structural Design Engineer from Bergmann PC, shared his tips about

Plastic Hinges

In this session, Yong Yang, principal structural engineer from Jacobs, will be demonstrating how plastic hinges can be set up quickly by the automatic determination of cross-sectional properties and member material through midas Civil's general section design (GSD) module.  

Can We Perform Shear Design With a Single Input?

Believe it or not, once upon a time, there were no computers available for us, bridge engineers. At that time, we had to perform every calculation by hand using calculators or even slide-rules. It was quite dull and time-consuming. Now all we have cutting-edge computers, which is way better than those we used when we landed at the Moon. Everything looks nice, and life seems beautiful, doesn't it?



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