# MIDASoft - Bridge Library

### Soil Structure Interaction during Earthquake using Boundary Nonlinear Analysis

Summary: The blog explains the importance of soil-structure interaction during the seismic design of bridges, along with current practices. ...

### Expert Tip: Validation of Bridge Seismic Analysis Model Results

Introduction: In the world of bridge design, seismic analysis is sometimes seen as a rigorous process that can yield results that, at first,...

### Expert Tip: Understanding Retaining Wall Design with MIDAS - A Beginner's Video Guide

Summary: In this video guide, we'll cover the basics of retaining wall design using MIDAS software. Geared towards MIDAS Civil beginners, we...

### Expert Tip: Economical design for steel composite bridges

Economical design for steel composite bridge Summary This article delves into the cost-effective design of steel composite bridges, with a f...

### Midas API: The Sky Is the Limit

Summary: The rapidly evolving construction industry demands cutting-edge technology to ease engineers' efforts. This blog explores how Midas...

### Understanding the Bridge Collapse of I 25, Colorado & Importance of RSI Analysis

Summary: In this article you will get to know the key concepts and importance of RSI analysis for the railway bridge. If we don’t ensure pro...

### Line Girder Analysis vs Finite Element Analysis

Summary: The blog article discusses the differences between line girder analysis and the finite element approach. It also helps the readers ...

### Streamlining Initial Cable Tension in Cable Stayed Bridges: The Midas Approach

Summary: Determining the initial cable forces in cable-stayed bridges is a critical step in ensuring the structural integrity and stability ...

### Beam Bridges: A Structural Marvel of Simplicity and Strength

Summary: Beam bridges, also known as girder bridges, are one of the most common and straightforward types of bridges found worldwide. Despit...

### Expert Tip: Curved Girder Analysis Part 3

I girder vs. tub girder Our next question may be “What are the differences between an I and a tub girder?”

### Bridging the Gap: The Indispensable Role of Rail Structure Interaction

What is Rail Structure Interaction? Rail structure interaction studies the interaction between railway tracks and concrete bridge structures...

### Expert Tip: Curved Girder Analysis Part 2

The previous article (Curvature effects on a medium-span curved bridge) showed that we should be cautious to get reasonable torsional moment...

### Expert Tip: Analysis of Suspension Bridges 5

Dr. Hirai was a Japanese engineer, professor, and researcher. In 1940, Dr. Hirai went to a movie theater and watched the news about the fail...

### Expert Tip: Analysis of Suspension Bridges 4

Analysis of suspension bridges - Peery’s methods use integration To calculate the area of influence lines, Simpson’s method has been applied...

### Suspension Bridges Unveiled: Where Engineering Meets Elegance

What are suspension bridges? A suspension bridge is a unique kind supported by large main cables suspended between two or more towers, often...

### Expert Tip: Analysis of Suspension Bridges 3

4th-order differential equation

### Expert Tip: Suspension Bridges 2

4th-order differential equation Eq(2) is a 4th-order differential equation, and we can imagine it is not simple to solve.

### Expert Tip: Suspension Bridges 1

The Question We have structural analysis programs. Can we make the model (like other conventional bridges) and perform the analysis (as usua...

### Recent Advancements in Prestressed Concrete Bridges

Introduction Prestressed concrete technology is widely used worldwide in the construction of various structures, especially bridges. Prestre...

### Expert Tip: Creep Analysis - Next Steps

Composite Section Analysis Finally we came to the composite section analysis. One of the best examples is from Dr. Gilbert and Dr. Ranzi (Ex...

### Why Do We Need Pushover Analysis?

The limitations of linear static analysis in the seismic design gave rise to non-linear static analysis or Pushover analysis. Pushover analy...

### Expert Tip: Concrete shear design based on AASHTO LRFD 5

Solving the previous example from full iteration Now it’s time to solve the previous example from full iteration. For simplicity, interactio...

### Expert Tip: Concrete shear design based on AASHTO LRFD 4

Findings and remarks 1. We can calculate the feasible crack angle ranges for each εx and vu/f’c combination. θ min corresponds to concrete c...

### Expert Tip: Concrete shear design based on AASHTO LRFD 3

Optimum crack angle θ From the previous example, we can catch that there are some possible crack angle ranges for the given εx and vu/f’c. N...

### The importance of API and its use

What is Application Programming Interface (API)? The first thought that will come into your mind is exactly what is this API? and why a civi...

### Expert Tip: Concrete shear design based on AASHTO LRFD 2

Longitudinal reinforcement Believe it or not, longitudinal forces are caused by shear, and we do need to design/check for these longitudinal...

### Expert Tip: Concrete shear design based on AASHTO LRFD 1

Concrete Shear Equation The concrete shear equation is

### The Morandi Bridge: Understanding the collapse of a suspension bridge

Morandi Bridge: An overview The Morandi Bridge (Officially: Viadotto Polcevera) was an architectural and engineering landmark since its cons...

### midas Civil: 2D and 3D culverts

The different types of finite element models one can generate 2D, 3D, and 4D finite element models are employed to analyze structures. Since...

### midas Civil: P-M Interaction Curve in Midas

Importance of the P-M interaction curve? As we all know, almost all compression members are subjected to moments along with axial loads, mai...

### midas Civil: Seismic Analysis of Underground Structures

Typical underground structures include tunnels, subway stations, underground parking lots, culverts, conduits, etc. These structures should ...

### Expert Tip: Column Elastic Buckling Analysis

So you have learned about column buckling under a point load applied at the end of the column, do you know if columns can buckle under their...

### Expert Tip: Finite Element Method Basics 4

In the FEM, the most critical question is “how many meshes do we need to get the correct (or reasonable) results?”

### Expert Tips: Finite Element Method Basic 3

Continuing on to the third part of this multi-part blog, another option is a quadrilateral element. As always, let’s start with an example.

### Expert Tips: Finite Element Method Basic 2

For the previous example, we can use high-order triangular elements. This element has six nodes per element and assumes the displacement is ...

### Expert Tips: Finite Element Method Basic 1

The scary part of FEM is sometimes FEM gives wrong results without any error message. The analysis may be meaningless if an engineer cannot ...

### Expert Tip: Prestressing Strands Profile with MCT Tool

The midas model is for a multi-channel prestressed girders bridge 30 ft span and 24.75 ft width. The bridge is composed of 9-channel prestre...

### Elongation Control to Prevent Issues in Prestressed Concrete Bridges

Elongations of Prestressing Steels

### The Importance of Soil-Structure Interaction in midas Civil

Due to the peculiar site soil conditions, as the great deformation capacity of its clay layers, the effects of soil-structure interaction mu...

### Expert Tips: PM Interaction Diagram Part 1

Unsymmetric Section Analysis

### Expert Tips: Unsymmetric Section Analysis

Unsymmetric Section Analysis

Creep Analysis 7

Creep Analysis 6

### Understanding Creep & Its Effect in Bridges

A concrete specimen when subjected to load undergoes response which is both immediate & time dependent. The time dependent effect can be maj...

### midas GTS NX: Modeling Soil-Structure Interaction - Piles, Abutments, and Retaining Structures

In this MIDAS Intro Session, our MIDAS engineer introduced the modeling of Soil-structure interaction (SSI) which is a physical phenomenon i...

### Irregularities in Bridges: Challenges & Their Implications

Due to the complex intersection at various places, such as highways, river crossings, and railway crossings, there is a continuously growing...

### midas FEA NX: Simulate Concrete Cracking and Cracked Section Behaviors Using Various Approaches

In this MIDAS Intro Session, our MIDAS engineer introduced approaches to simulate cracked RC sections based on AASHTO LRFD/ACI codes, the fu...

### The Importance of Seismic Analysis and Its Understanding

The seismic analysis is part of the structural analysis and the calculation of the response of a structure to earthquakes. It is part of the...

### Webinar: Analysis of I-10 Sunset to River Rd – UPRR Bridge using midas Civil

In this webinar session, our MIDAS Expert Engineer Zac Taylor P.E. and Charlie Golek from Kimley-Horn shared their experience and insights u...

### midas FEA NX: Buckling Analysis for Slender Structural Members

In this MIDAS Intro Session, our MIDAS engineer introduced the underlying principles of buckling analysis, ways to interpret the modal analy...

### Understanding Load Rating of Bridge as per AASHTO LRFR

The bridge load rating is a procedure to evaluate the adequacy of various structural components to carry predetermined live loads. In simple...

### midas FEA NX: Fatigue Analysis for Structural Connections

In this Intro Session our MIDAS engineer explained show how midas FEA NX uses 20-node solid isoparametric elements to perform life estimatio...

### Project Application: No. 05561 Bridge Project by Connecticut Department of Transportation

This new series of blog articles will introduce a few project applications of midas Civil. You can expect to see the size of the structure, ...

### Expert Tips: Analysis and Design of a Concrete Network Tied Arch Bridge for California High-Speed Rail

In our previous webinar, Analysis and design of a concrete network tied arch bridge for California high-speed rail, our MIDAS Expert Enginee...

### midas FEA NX: Evaluating Creep Response Using Time-Step Analysis

In this Intro Session our MIDAS engineer explained how midas FEA NX uses 2D/3D elements to simulate the time-dependent material using age-de...

In the previous blog basic finite element mesh explained, we have looked into several types of conventional elements within the 1D, 2D, and ...

### Expert Tips: Creep Analysis 5

Creep Analysis 5 MIDAS Example

### Webinar: Analysis and Design of a Concrete Network Tied Arch Bridge for California High Speed Rail

In this webinar session, our MIDAS Expert Engineer Hadi T. Al-Khateeb, Ph.D., S.E., P.E. a Senior Bridge Engineer at Jacobs provided an over...

Creep Analysis 3

Creep Analysis 3

Creep Analysis 2

### Structural Connections and Contacts

Structural connections are usually the weakest part of a steel structure; however, they are rarely the subject of structural analysis. To si...

### Basic Finite Element Mesh Explained

To ensure stable analysis performance and reliable result approximation, meshing is important. Meshing is the process to create finite eleme...

### Expert Tips: Geometric Nonlinearity Explained

Dr. Seungwoo Lee has talked about some fundamental differences between linear and nonlinear analysis in structural engineering in the past. ...

Creep Analysis 1

### Webinar: 2D Excavation Supported by Tiebacks & Rakers

In this workshop, Top MIDAS Expert Parsa Heydarpour Ph.D., P.E., M.ASCE , Project Engineer at Subsurface and Tunnel Engineering presented on...

Overview

### Expert Tips: Iteration and Optimization 2

Iteration and Optimization

Example

### 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...

### midas FEA NX: Heat Transfer and Heat of Hydration Analysis

This webinar shows Midas FEA NX's capability in simulating heat transfer within the structure and the heat of hydration analysis with the ti...

### Ensuring Element Quality for Mesh Size Transition

Keep Running into Analysis Errors When Everything Looks Right? It’s not uncommon for the analysts to run into the same analysis error after ...

In this Intro Session our MIDAS engineer explained about Midas FEA NX's capability in simulating structural connections such as contact, wel...

### Midas NFX: CAD or CAE? [Infograph]

CAD or CAE? What's the difference? They might sound similar, but CAD and CAE are very different disciplines with their own goals, practices ...

### Midas NFX: Boiler Cover Plate Case Study

Analysis Purpose : Improvement for Deformation of Cover The engineers performed linear static analysis to reduce deformation of cover plate ...

### Midas NFX: Geometry Simplification (2019 midas NFX Webinar Series)

Presentation Overview Why to simplify? The decision to suppress or preserve geometry strongly depends on the analysis context and the applic...

### Midas NFX: Introduction to Analysis for Designers [IAD 1]

1. Know The Basics The number of companies introducing Computer Aided Engineering (CAE) software with 3D Computer Aided Design (CAD) capabil...

### Midas NFX: Assembly Analysis [IAD 6]

From the series Introduction to Analysis for Designers... 6. Assembly Analysis Most products are composed of several parts, so assembly anal...

### Midas NFX: Analysis Results Evaluation [IAD 7]

From the series Introduction to Analysis for Designers... 7. Analysis Results Evaluation In this series, we have been discussing the procedu...

### Midas NFX: Thermal-Structural Coupled Analysis [IAD 5]

From the series Introduction to Analysis for Designers... 5. Thermal-Structural Coupled Analysis Generally, a structure expands or shrinks w...

### Midas NFX: Innovative CAE Solution

For your competitive edges, Innovative CAE Solution The Expected Effects of Acquisition For Analysis Engineers, "60% Reduced Analysis Time 1...

### Midas NFX: Why We Love Structural Analysis (And You Should, Too!)

First comes the idea. A wonderful spark of ingenuity springs from the depths of our conscience and rushes through the thalamus to reach the ...

### Midas NFX: Topology Optimization [Infograph]

“How The Heck Did You Get That Shape?” Topology optimization is a novel and rapidly growing field of structural mechanics that offers great ...

### Midas NFX: Mesh For Accuracy [IAD 2]

From the series Introduction to Analysis for Designers... 2. Mesh For Accuracy To perform most of Finite Element Analysis (FEA), a method wi...

### Midas NFX: Finite Element Analysis Types - The Ultimate Cheat Sheet

Finite Element Analysis Types: The Ultimate Cheat Sheet Structural Analysis Structural analysis is the study of how a physical structure rea...

### Midas NFX: Boundary Conditions of Eigenvalue Analysis [IAD 4]

From the series Introduction to Analysis for Designers... 4. Boundary Conditions of Eigenvalue Analysis In the previous section, we examined...

### Midas NFX: The Future of Finite Element Analysis: MeshFree

The Future of Finite Element Analysis

### Midas GTS NX: 2D Tunnel Lining

Detail of this Session This tutorial introduces how to do tunnel lining structural analysis before cross section design.

### Midas GTS NX: 3D embankment consolidation

Detail of this Session Through consolidation analysis of 3D construction stage, verify the ground deformation (settlement) and stress change...

### Midas GTS NX: 3D Excavation and Piled-Raft Foundation

Summary This tutorial identifies the soil–structure interaction by analyzing construction stage of 3D retaining wall excavation and a piled ...

### Midas GTS NX: 3D Model for the Simulation of Mechanized Tunnel Excavation

Kai Zhao • Michele Janutolo • Giovanni Barla

### Midas GTS NX: 3D Modeling - Pile Construction & Loading Effects

Jung-Feng Chang, I-Chou Hu, Ting-Chiun Su, and Hsiao-Chou Chao

### Midas GTS NX: 3D tunnel connection analysis

Detail of this Session The purpose of tunnel analysis is to see the effect of tunnel construction on surrounding facilities and to review th...

### Midas GTS NX: 3D Tunnels with Intersecting Galleries

Detail of this Session This webinar will introduce how to perform finite element analysis for sequentially excavated tunnels with multiple i...

### Midas GTS NX: 4  Ways To Reduce the Cost of Underground Retaining Walls

The LeBreton LRT project was an actual project that completed construction and opened it to the general public on September 14, 2019. Since ...

### Midas GTS NX: Analysis and Construction of Cross Passage of Delhi Metro

YuyouYang, QinghongZhou, HonganLi, XuegangHuang, and XiaomingTu

### Midas GTS NX: Analysis of Face Stability: Excavation of Double-O-Tube Shield Tunnel

YuyouYang, QinghongZhou, HonganLi, XuegangHuang, and XiaomingTu

### Midas GTS NX: Barretted Raft Design: High-Rise Building Applying 3D Numerical Tool

Mariusz Leszczynski

### Midas GTS NX: Bridge 3D Soil Structure Interaction Methods Comparison

This session has been prepared upon the request by the Office of Earthquake Engineering in California Department of Transportations(Caltrans...

### Midas GTS NX: Bridge Construction above Existing Underground Railway Tunnels

Jong-ho, Shin, Jeong-ho, Moon, In-keun, Lee, Kee-yeon, Hwang

### Midas GTS NX: Buoyancy eﬀect on shallow tunnels

Osvaldo P.M. Vitalia, Tarcisio B. Celestinob, Antonio Bobeta

### Midas GTS NX: Congrats to Our 44th Annual DFI Conference Winner!!

MIDASoft exhibited at the DFI 44th Annual Conference on Deep Foundations, on October 15-18, 2019, at the Hilton Chicago. The theme of the co...

### Midas GTS NX: Dam Seepage Analysis

Detail of this Session In this tutorial dam stability is verified under full water level and sudden draw-down conditions through 3D seepage ...

### Midas GTS NX: Deep excavations and retaining walls

O.J. Gastebled & S. Baghery

### Midas GTS NX: Design of Grand Ethiopian Renaissance RCC Main Dam

Giorgio Pietrangeli Alberto Bezzi Claudio Rossini Alessandro Masciotta Davide D’Alberti

N. E. EL FARIS

### Midas GTS NX: Excavation by Tunnel Boring Machine in 3D FEM

TBM is becoming one of the most common tunnel excavation methods in cities with limited space because other methods such as open-cut or NATM...

C.A. Makarim

### Midas GTS NX: Foundation design for the Pentominium tower in Dubai, UAE

Kamiran Ibrahim MSc, PhD

### Midas GTS NX: Fully Coupled Analysis of an embankment during settlement

The attendee will learn the use of several advance functions of GTS NX, which allows the numerical analysis of settlement by 2 methods. From...

Sangeun Lee

### Midas GTS NX: GTS NX Interfaces AutoCAD - Soil–Pile Interaction Analysis

Summary GTS NX has multiple interfaces with various CAD formats and structural (building and bridge) software for the most advance 3D Geotec...

### Midas GTS NX: Hydraulic Significance of Fractured Zones in Subsea Tunnels

Jong-Ho Shin , Kyu-Cheol Choi , Jae-Ung Yoon & Young-Jin Shin

### Midas GTS NX: Improved design method for 2-arch tunnel

Wan Gi Jeon, Kyeong-Han Jeong & Ju Hyoung Lee

### Midas GTS NX: Junction Design in Rock – A State of the Art Review

Seth Pollak, Senior Engineer, Arup

### Midas GTS NX: Leaning Into Safety with SSI

Bonanno Pisano and Gherardo diGherardo were tasked with the honor of the ceremonial complex of monuments that would enrich the Piazza dei Mi...

### Midas GTS NX: This webinar showed how to use the Finite Element Method to simulate the staged construction of a tunnel by a Tunnel Boring Machine (TBM) in soft soil.

This technical webinar will focus on the steps of importing a building from midas Gen to midas GTX NX for dynamic analysis. Full soil struct...

### Midas GTS NX: TBM in Soft Soil

SUMMARY This webinar showed how to use the Finite Element Method (FEM) to simulate the staged construction of a tunnel by a Tunnel Boring Ma...

### Midas GTS NX: midas GTS NX 2019 v1.1 Release: Thermal Analysis

Summary The new thermal analysis module includes heat transfer, thermal stress, and seepage-thermal stress analysis types. This analysis typ...

### Midas GTS NX: Misaligned Shallow Tunnels - Geostatic Principal Stress Directions

Osvaldo P.M. Vitalia,, Tarcisio B. Celestinob, Antonio Bobeta

### Midas GTS NX: Modeling of Combined Pile Raft Foundation: Midas-GTS and Axis 3-D

Edina Koch, MSE Janos Szep, MSE Richard Ray, Ph.D.

### Midas GTS NX: Moving train load time history analysis

Detail of this Session Train vibration is periodic loading phenomenon, which occurs as a result of train wheels passing above the ground sur...

### Midas GTS NX: Numerical Assessment: Crystalline Rock Design of ONKALO Rock Facility

Mr. Topias Siren, Kalliosuunnittelu Oy Rockplan Ltd., Finland

### Midas GTS NX: Optimization study for staged construction of  Gibe 3 dam

Alessandro Masciotta Alessandro Cagiano de Azevedo Francesca Mattei

### Midas GTS NX: Pile Foundation Design and Analysis

Detail of this Session This online technical seminar will introduce the FEM approach to consider soil-structure interaction for shored excav...

### Midas GTS NX: Pile Raft Foundation Analysis with Superstructure and Substructure

Detail of this Session This online technical seminar will basically introduce 3D modelling of pile-raft combination in GTS NX .Geotechnical ...

### Midas GTS NX: Progressive Failure Due to Tunnel Misalignment

Osvaldo P. M. Vitali

### Midas GTS NX: Recovery Execution: Collapsed Face of Soil-Tunnel Entrance One-Way

Sang-baik Woo, Jong-ho Park, Hong-Sung Lee, Yong-ki Choi

### Midas GTS NX: Results comparison between GEOSTUDIO and MIDAS GTS NX models

Many engineers are using software like GeoStudio Suite from GeoSlope for 2D geotechnical analyses. Recent advances in computer modeling and ...

### Midas GTS NX: Semi Coupled Analysis: Slope & Dam Stability

Summary Climate change has intensified weathering effects due to rain, leading to higher frequency of structural and slope failures designed...

### Midas GTS NX: Shaft-Tunnel Junction Compact Design: Numerical Methods Design & Use

Sylvie Giuliani-Leonardi, VINCI Construction

### Midas GTS NX: Slope failure due to void creation in highly expansive alluvial soil

Chaidir Anwar Makarim, Tarumanagara University

### Midas GTS NX: Software Comparison for Mesh Export & Analysis - GTS NX & FLAC 3D

The purpose of this webinar was to compare the calculation and results between finite difference (FDM) and finite element methods (FEM) on s...

### Midas GTS NX: Soil behavior under deepening foundations in reconstructed buildings

Jurgis Medzvieckas Danute Slizyte

### Midas GTS NX: Soil Structure Interaction Analysis of Skyscraper in Brazil

Summary The focus of the case study will be a soil structure interaction analysis by the direct method of a 55 story (168 m) building in the...

### Midas GTS NX: Soil Structure Interaction for Shored Excavation using 3D FEM Analysis

Detail of this Session This online technical seminar will introduce the FEM approach to consider soil-structure interaction for shored excav...

### Midas GTS NX: Soil-Foundation Superstructure Interaction for The Kingdom Tower

Dr. Khaldoun Fahoum, PE

### Midas GTS NX: Soil-Foundation Superstructure Interaction: Pile-Raft Foundations

Konstantinos Syngros, Ph.D., P.E. Alan Poeppel, P.E.

### Midas GTS NX: Solution - Unaligned Tunnels with Geostatic Principal Stress Directions

Osvaldo P.M. Vitalia, Tarcisio B. Celestinob, Antonio Bobeta

### Midas GTS NX: Study for Compensation Grouting: Underground Railway of Florence Case

P. Cucino, S. Fuoco, D. Maniezzo

Summary The suction piles, commonly used as part of deep marine foundations, are fixed to the bottom of the sea by the suction created after...

### Midas GTS NX: TBM effect-Thrust force on lining segments of tunnel embedded in rock

Moon Kyum Kim, Seok Ho Cho, Jeong Soo Kim, Jong Hwa Won

### Midas GTS NX: The Future of Ontario's Transit Network

To date, the Eglinton Crosstown Transit project, a 19-kilometer light rail line, was budgeted as the most expensive infrastructure project i...

### Midas GTS NX: Three Dimensional Finite Element Analysis of Railway Track

Sowmiya, L.S. Shahu, J.T. Gupta, K.K.

### Midas GTS NX: Training: Liquefaction Analysis of Bridge Abutment with UBC SAND model

Summary The response of pile foundations to lateral soil deformation induced by liquefaction during an earthquake is a key design considerat...

### Midas GTS NX: Tunnel Analysis with a Structural Approach - 3D Lining

And here we reached the end of this series. So far, in the first part, we introduced some of the most relevant aspects of tunnel design, we ...

### Midas GTS NX: Tunnel Excavations in 3D FEM

Summary This session focuses on numerical analysis of shallow tunnels in uneven terrains, which frequently cause soil-structure interaction ...