DESIGN OF CIVIL STRUCTURES

I n t e g r a t e d S o l u t i o n S y s t e m f o r B r i d g e a n d C i v i l E n g i n e e r i n g

Release NoteRelease Date : July. 2014

Product Ver. : Civil 2015 (v1.1)

Enhancements

(1) Steel Composite Girder Design as per AASHTO LRFD 2007, 2012

(2) Load Combinations for Composite Steel Girder as per AASHTO LRFD 2007, 2012

(3) Composite Steel Bridge Load Rating as per AASHTO LRFR 2011

(4) PSC Composite Girder Design as per EN1992-2:2005

(5) Addition of Multiple Erection Load Cases in Construction Stage Analysis Control

(6) Update Long-term Boundary Group in Composite Section for Construction Stage

(7) Wave Loads

(8) Construction Stage Analysis considering Camber

(9) Damping Constant in Spring Supports

(10) Cracked Section Stress in GSD

Analysis & Design 3

Pre & Post-Processing

(1) Revit 2014 Interface

(2) Improvements on Composite Section Properties

(3) Addition of US DB Sections for PSC Value Type

(4) Improvements on Tendon Template Wizard

(5) Improvements on SPC for Quick Generation

(6) Displacements according to Node Local Axis

(7) Improvements on Dialog Boxes to be more User Friendly using 1024*768 Resolution

(8) Addition of Group Column in Elastic Link Result Table

(9) Unit Option for Tables and Graphs in Dynamic Report

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

Straight or curved steel composite bridge design for I, Tub and Box sections as per AASHTO LRFD Bridge Design Specifications is now available.

Long term effects can be simulated using modular ratio (n) or time dependent material definition.

Both composite steel bridge models with and without construction stages are supported inComposite Steel Girder Design.

Design forces or moments classified as Dead(Before Composite), Dead (After Composite) and Short Term loads can be seen inDesign Force/Moment table.

Design results are available in tabular and excel format for Strength Limit State (Flexure & Shear resistance), Service Limit State, Fatigue Limit State, Constructibility(Flexure &

Shear resistance), Shear Connector, Transverse and Longitudinal Stiffener.

All design results along with the formula used and their reference clauses from the code are available in the Excel report for all the design output positions chosen bythe user.

Span Checking table is available for each span showing the most critical member in the entire span.

Total Checking table is available for viewing the design results for each and every design member.

Design ResultDiagram is available for forces and stresses.

Design > Composite Design > AASHTO-LRFD 07,12

1. Steel Composite Girder Design as per AASHTO LRFD 2007, 2012

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

2. Load Combinations for Composite Steel Girder as per AASHTO LRFD 2007, 2012

Composite Steel Girder Design load combination tab is applicable for steel composite bridge design as per AASHTO LRFD 07 and 12.

Auto generation of load combinations under this tab is supported for AASHTO-LRFD 07 and 12. Load Combination Type under Design > Composite Design menu is automatically

specified when [Auto Generation] function is used. When the load combinations are manually entered, the user has to specify the load combination type for performing composite

design.

Load combinations in Composite Steel Girder Design tab are applicable only to Steel Composite Design function. They are not applicable to the general result functions (ex. Results

> Reactions,Deformations,Forces, and Stresses).

In Composite Steel Girder Design tab, Dead Load(CS) is used for defining load factor of before composite dead load case. For the dead loads after composite action, the user has to

specify Erection Load cases inConstruction Stage Analysis Control dialog box.

Results > Load Combination

Load Combinations

Load Combination Type

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

3. Composite Steel Bridge Load Rating as per AASHTO LRFR 2011

Rating > Steel Bridge > AASHTO-LRFD 12

Steel Composite Bridge Load Rating as per Manual for Bridge Evaluation, Second Edition, 2011 is newly implemented. Strength, Service and Fatigue Limit State Rating Cases are

supported for Steel Bridge Load Rating.Design Live Load, Legal Load and Permit Load evaluation live load models are supported.

Adjustment factor resulting from the comparison ofmeasured test behavior with the analytical model can be considered to calculate the load-rating factor based on the test result.

Member resistances and allowable stresses complywith AASHTO LRFD Bridge Design Specifications, Sixth Edition, 2012.

Results are available in tabular and excel format for Strength Rating (Flexure & Shear), Steel Stress Rating and Fatigue Rating.

Excel report displays the detailed results for all the design output positions chosen by the user. It also displays the Load Rating Summary table which contains the information

about the most critical element along with the rating factor, weight in tonnage and safe load capacity of the bridge.

Design result diagram for forces and stress can be viewed.

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

General type PSC composite section design (including manystandard PSC sections in value type DB) is now available as per EN1992-2:2005.

Composite section for construction stages considering time dependent material can be considered with consideration of tendons and reinforcement in each stage (before and after

composite effect).Composite infill sections are also supported.

Ultimate Limit State (Bending, Shear resistance) and Service Limit State (crack, decompression check) design is provided. All checks can be viewed in the Excel calculation report.

Design results can be checked in the result tables for strength (bending, shear) and stress under construction and service loads, and tendons. PSC result diagram for forces and

stress is also provided.

PSC > Eurocode2-2:05

4. PSC Composite Girder Design as per EN1992-2:2005

PSC Design Result Diagram

PSC Design Parameter

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

PSC Design Excel Report

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

5. Addition of Multiple Erection Load Cases in Construction Stage Analysis Control

In midas Civil, the results of all the load cases except for Creep, Shrinkage and Relaxation of Tendons are lumped into CS: Dead Load. However we can select certain load cases

to be distinguished from the Dead Load and produce the results under CS:Erection Load.

In the previous version,only one erection load case was able to be defined. In the new version, up to 3 erection load cases can be defined.

This feature is very useful to distinguish Dead Load of Component (DC) and Dead Load of Wearing Surfaces (DW) for different load factors when generating load combinations as

per AASHTO LRFD.

Dead Load of Wearing Surfaces (DW)

Analysis > Construction Stage Analysis Control

Dead Load of Component (DC)

Enter Erection Load Case Name

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

6. Update Long-term Boundary Group in Composite Section for Construction Stage

In midas Civil, creep and shrinkage effects can be simulated using Time Dependent Material Properties for accurate results. As an approximation, modular ratio (n) using Stiffness

Scale Factor boundary group can be applied for long-term effect. Once the user defines the ratio of Es/Ec(Creep) and Es/Ec(Shrinkage) in Section Properties dialog box, the

program automaticallygenerates StiffnessScale Factor boundarygroups.

[Update Long Term] button is added to automaticallyactivate the long-term boundarygroups at the construction stages that concrete decks are activated.

Analysis > Construction Stage Analysis Control

Modular Ratio for Long-term Effects

Automatic Generation of Stiffness Scale Factor

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

7. Wave Loads

Generate wave loads for static and time historyanalysis.

For static analysis, wave loads are generated as static nodal loads. For time history analysis, wave loads are generated as Dynamic Nodal Loads along with Time Forcing

Functions.

The program can validate the defined wave load data based on Dean(1970) Graph and Le Mehaute (1979) Graph.

Load > Settlement/Misc. > Wave Loads

Wave Load Validation Check

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

8. Construction Stage Analysis considering Camber

Displacements considering camber in the Global Z-axis can be calculated for each construction stage. Following options are provided for defining camber values:

Deformation Camber: Camber calculated from FCMCamber andGeneral Camber function is automaticallyentered.

Using Interpolation by Key Nodes Camber: Camber values are automatically calculated using parabolic curve equation by specifying start and end nodes with maximum

camber value.

User Defined Camber: Specify the camber value for each node separately.

Displacement without considering Camber Displ. Option

Displacement with considering Camber Displ. Option

FCM Camber Table Construction Stage Analysis Control Deformed Shape Dialog Box

Load > Construction Stage Loads > Camber for Construction Stage

Results > Deformations > Deformed Shape / Displacement Contour

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9. Damping Constant in Spring Supports

Damping coefficient can be specified in Point Spring Supports and

Surface Spring Supports.

In case of Surface Spring Supports, spring stiffness and damping

coefficient per unit area needs to be defined and the springs are automati

cally entered at each node represented by concentrated stiffness and da

mping constant. it is converted to the element support.

In case of Point Spring Supports, spring stiffness and damping coefficient

per unit length and unit angle needs to be defined.

Damping constant is applicable in Response Spectrum analysis and Time

History analysis.

Model > Boundaries > Surface Spring Supports

Model > Boundaries > Point Spring Supports

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Civil 2015 V1.1 Release NoteCivil 2015 Analysis & Design

10. Cracked Section Stress in GSD

Cracked section stresses in the elastic behavior without and with axial force are calculated for RC and SRC members.

It is useful to check stress limitation under service limit state for the arbitrary sections and to calculate crack width using the stresses of reinforcement.

The effect of creep on the stresses is simplyconsidered byusing the user-defined ratio ofmodulus elasticityof reinforcement to concrete.

It is assumed that the tensile strength of concrete is zero. The neutral axis depth is determined using cracked transformed section approach.

Tools > General Section Designer

Cracked Section Stresses in midas GSD

Cross Sectionat Crack

TransformedSection

Strain Distribution

StressDistribution

Cracked Elastic Behavior

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Civil 2015 V1.1 Release NoteCivil 2015 Pre & Post-Processing

1. Revit 2014 Interface

File > Import > midas Civil MCT File

Using Midas Link for Revit Structure, direct data transfer between midas Civil and Revit Structure is available for Bridge Information Modeling (BrIM) workflow. Midas Link for Revit

Structure enables us to directly transfer a Revit model data to midas Civil, and delivery back to the Revit model file. It is provided as an Add-In module in Revit Structure and midas

Civil text file (*.mct) is used for the roundtrip.

Functions Revit Civil

Linear

Elements

Structural Column

Beam

Brace

Curved Beam >

Beam System >

Truss >

Planar

Elements

Foundation Slab

Structural Floor

Structural Wall

Wall Opening & Window >

Door >

Vertical or Shaft Opening >

Boundary

Offset >

Rigid Link >

Cross-Section Rotation >

End Release >

Isolated Foundation Support >

Point Boundary Condition >

Line Boundary Condition >

Wall Foundation >

Area Boundary Condition >

Load

Load Nature >

Load Case >

Load Combination >

Hosted Point Load >

Hosted Line Load >

Hosted Area Load >

Other

ParametersMaterial

Send Model to midas Civil

Revit 2014 Civi l 2015

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Civil 2015 V1.1 Release NoteCivil 2015 Pre & Post-Processing

Composite Steel-Tub section type is newly added. In the previous version, the user needed to use Section Property Calculator(SPC) module to define the tub shape sections. In

the new version, the user can simplyspecifythe section dimension for tub section. This section is applicable for composite steel girder design as per AASHTO LRFD 07&12.

Longitudinal stiffeners can be defined in Section Properties dialog box. Flat, Tee, and U-Rib shape stiffeners are applicable. Toggle on C column in the table in order to consider

the longitudinal stiffeners in section stiffness calculation.Specified longitudinal stiffeners are applied in composite steel girder design as per AASHTO LRFD 07&12.

Stiffener Type

Flat Tee U-Rib

Stiffener Position

Both Left Right

2. Improvements on Composite Section Properties

File > Import > midas Civil MCT File

Longitudinal Stiffener

Steel-Tub Composite Section

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Civil 2015 V1.1 Release NoteCivil 2015 Pre & Post-Processing

Following section database ofPSC Value type has been newly added:UK-UMB, UK-MY, UK-MYE, UK-Solid Box, UK-SYE, UK-T, UK-TYE(Rebate), UK-U_SU, UK-W.

These sections are applicable for PSC composite girder design as per EN1992-2.

3. Addition of UK DB Sections for PSC Value Type

Properties > Section Properties

PSC Section Database for Composite Sections

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Civil 2015 V1.1 Release NoteCivil 2015 Pre & Post-Processing

4. Improvements on Tendon Template Wizard

Use tendon templates based on standard precast sections to automatically generate tendons in elements. It supports tendon positioning for all standard sections from the UK

database except for UK-UM.

In the previous version,Tendon TemplateWizard was applicable onlyto the standard PSC DB sections. In the new version, it can be used with any type of sections.

Structure > PSC Bridge > Tendon Template

Tendon Template

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5. Improvements on SPC for Quick Generation

Quick generation wizard for PSC composite section is newly added in Section Property Calculator. Go to Model > Section > Composite Section > Quick Generation from the main

menu.Generated section can be directly saved as *.sec file format.

PSC composite sections generated in SPC can be imported as Composite-General type section in midas Civil for global analysis and PSC composite design as per EN1992-

2:2005.

Tools > Section Property Calculator

SPC

Section Properties in midas Civil

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Civil 2015 V1.1 Release NoteCivil 2015 Pre & Post-Processing

6. Displacements according to Node Local Axis

Results > Deformations > Deformed Shape / Displacement Contour

Results > Results Tables > Displacements > Displacements(Local) tab

Where nodes are defined with local coordinate systems, displacements can be produced with respect to the local coordinate systems.

This feature is extremely useful to check the displacements at the bearing positions of the curved bridge.

Node Local Axis Displacements in Node Local Axis

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7. Improvements on Dialog Boxes to be more User Friendly when using 1024*768 Resolution

Load > Temp./Prestress > Tendon Profile

Load > Moving Load > Traffic Line Lanes

Tendon Profile Traffic Line Lane

Some dialog boxes can now be resized by hiding some of the information to better fit smaller resolution screens.

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Civil 2015 V1.1 Release NoteCivil 2015 Pre & Post-Processing

8. Addition of Group Column in Elastic Link Result Table

Boundary group of elastic links can be viewed in the result table along with link

forces.

Result > Result Tables > Elastic Link

Elastic Link Result Table

9. Unit Option for Tables and Graphs in Dynamic Report

In the previous version, units of tables and graphs in the dynamic report werealways identical to the global unit system. In the new version, unit can be specified

by tables and graphs separately.

Tools > Dynamic Report Generator

Table/Chart Unit Dialog Box