Civil 2011 (v2.1)Release Note - CSPFea · 2016-09-17 · midas Civil 3/ 14 Civil 2011(v2.1) Release Note 1. Railway train loads as per EN 1991-2: 2003 Rail traffic actions as per

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Civil 2011(v2.1) Release Note

Civil 2011 (v2.1)Release NoteIntegrated Solution System for Bridge and Civil Engineering

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Enhancements

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Railway train loads as per EN1991-2:2003

Straddling special vehicles as per EN1991-2:2003 UK NA

General shape composite steel girder check as per EN 1994-2:2005

Improvement in pushover analysis speed

Improvement in defining the location of pushover hinges

Auto termination option in the pushover analysis

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1. Railway train loads as per EN 1991-2: 2003

Rail traffic actions as per EN1991-2: 2003 can be defined in midas Civil.Rail traffic actions are simulated by the means of load models as defined in the Eurocode.Five models of railway loading which can be defined are:

• Load Model 71 (and Load Model SW/0 for continuous bridges) to represent normal rail trafficon mainline railways,

• Load Model SW/2 to represent heavy loads,• Load Model HSLM A1-A10 and HSLM B to represent the loading from passenger trains

at speeds exceeding 200 km/h (Static analysis using dynamic factor),• Load Model “Unloaded train” to represent the effect of an unloaded train.

Dynamic effect based on the condition of the track maintenance can also be considered.

Rail Traffic Load Models Dynamic factor application

Load > Moving Load Analysis Data > Vehicles

Load > Moving Load Analysis Data > Moving Load Cases

Load > Moving Load Analysis Data > Moving Load Code

Load > Moving Load Analysis Data > Railway Dynamic Factor, Railway Dynamic Factor by Element

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Step 1. Open midas Civil model file.

Step 2. Specify the Moving Load Code as Eurocode (Load>Moving Load Analysis Data>

Moving Load Code).

Step 3. Add a standard vehicle.

Step 4. Select EN 1991-2:2003 Rail Traffic Load.

Step 5. Traffic Load models can be defined as required.

Procedure for defining the Rail traffic load models

Select Eurocode Add a standard vehicle

Select the Traffic Load Standard Name and the required load model.



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Procedure for defining the load case for rail traffic load

Step 1. After defining the rail traffic load vehicle, select a Railway Bridge load model inLoad> Moving Load Analysis Data> Define Moving Load Case.

Step 2. Define the psi1 factor if required and add a Sub-Load case with the required loading effect for the rail traffic vehicle.

Step 3. In the sub-load case dialog box, select the previously defined vehicle.Step 4. Specify the Min and Max Number of Loaded Lanes and select the lanes from the

Assignment Lanes list.Step 5. Press OK to complete the load case definition.

Moving Load Case for rail traffic load


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Procedure for defining the Dynamic Factor

Step 1. Dynamic factor can be applied through Load>Moving Load Analysis Data>Dynamic

Factor.

Step 2. Select the elements on which the dynamic factor has to be applied.

Step 3. The Dynamic Factor can be input either manually or automatically by the program.

If Auto Input is selected, determinant length along with the quality of track

maintenance should be defined. A reduction in dynamic factor due to the cover

thickness can also be considered.

Step 4. The dynamic factors calculated can be checked or modified in the table format using

Load>Moving Load Analysis Data>Dynamic Factor Table.

Dynamic Factor

Dynamic Factor Table

Load > Moving Load Analysis Data > Railway Dynamic Factor, Railway Dynamic Factor by Element

Load > Moving Load Analysis Data > Railway Dynamic Factor by Element Table

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2. Straddling special vehicles as per EN 1991-2 UK NA

Special vehicles (SV/SOV)

midas Civil can now also simulate the vehicles which can straddle between two lanes. These newly added straddling vehicles are as per UK National Annex and include :• Load Model 3 (SV 80)• Load Model 3 (SV 100)• Load Model 3 (SV 196)• Load Model 3 (SOV 250)• Load Model 3 (SOV 350)• Load Model 3 (SOV 450)• Load Model 3 (SOV 600)




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Procedure for defining the load case using straddling vehicles

Step 1. Add a moving load case after defining LM1 and LM3 special straddling vehicles.

Step 2. Select the LM1 & 3 Multi (Straddling) load model.

Step 3. Select the LM1 and LM3 vehicle in the Load Case Data.

Step 4. Select any two lanes from the Selected Lanes list and press button to specify them

as Straddling Lanes. Remaining area can also be considered.

Moving load case for LM1 & Special Multi

Vehicle definition

The behavior of the bridge on application of the straddling vehicle can be seen by making a

load combination of Load Model 1 and straddling Load Model 3 vehicles. For the definition

of such a load combination follow the steps described below. The load combination will

automatically consider the placement of the straddling vehicle on two lanes considering the

worst effect on the bridge. This load combination will also take into account the

longitudinal placement of the Load Model 3 vehicle with a prescribed spacing as per the UK

National Annex.



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3. General shape composite steel girder check as per EN 1994-2:2005

• Code check can be performed for any shape of composite section.

• The following checks as per the Ultimate Limit State can be applied:

• Bending Resistance with the classification of cross-section

• Resistance to Vertical Shear considering buckling resistance

• Resistance to Longitudinal Shear

• The following checks as per Service Limit State can be applied:

• Stress limitation (Concrete, Reinforcement, Structural steel)

• Longitudinal shear force per connector

• Sections imported from SPC are supported.

• Longitudinal rebars can be assigned to the composite sections.

• Transverse and longitudinal stiffeners can be assigned and used for code check.

• Due consideration is given to class determination as per Eurocode.

• Design Report can be obtained in the table format or Excel format.

Table For Vertical Shear Resistance Check

Design > Composite Steel Girder Design

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• Reinforcement can be provided either as line type, point or poly-line type.

• Top Flange, Bottom Flange and Web can be categorized as Internal and outstand members as required by Eurocode.

• Transverse Stiffeners can be provided.

• Transverse Stiffeners at end supports can be assigned as either Rigid End Post, Non Rigid End Post or No End Post.

• Different Transverse Stiffeners can be provided to different supports.

Design > Composite Steel Girder Design > Longitudinal Reinforcement

Definition of Reinforcement

Design > Composite Steel Girder Design > Transverse Stiffener at End Support & Transverse Stiffener

Definition of Transverse Stiffener of End Support

Definition of Transverse Stiffener

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• Tabular Results for different checks such as Bending Resistance, Shear Resistance and Stresses can be obtained.

• Excel Report can be generated.

Design > Composite Steel Girder Design > Design Result Tables >Bending Resistance

Result Table for Bending Resistance Check

Design > Composite Steel Girder Design > Design Result Tables >Resistance to Longitudinal Shear

Result Table for Longitudinal Shear Check

Detailed Report in Excel Format

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4. Improvement in pushover analysis speed

Design > Pushover Analysis > Perform Pushover Analysis

Pushover analysis model

Analysis results

[Civil 2011 v1.1] Pushover curve [Civil 2011 v2.1] Pushover curve

▣ 1,550 beam elements

Analysis time

ProgramTotal Analysis Time (sec) : 1,550 elements

20 steps 50 steps 100 steps 200 steps

Civil 2011 (v1.1) 14.72 95.35 446.02 1443.00

Civil 2011 (v2.1) 9.30 20.28 36.76 71.93

Ratio 63.17% 20.97% 8.24% 4.98%

Pushover analysis speed has been significantly improved by enhancing the analysis algorithm and output process.

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5. Improvement in defining the location of pushover hinges

• Axial, shear and torsion hinges (Fx, Fy, Fz, and Mx) can now be assigned to i-end and j-end

of a member separately. In the previous version, they were assigned to the center of the

member.

• It is applicable to RC, Steel and SRC members. For the masonry material, axial, shear, and

torsion hinges are assigned to the center of the member.

Design > Pushover Analysis > Define Pushover Hinge Properties

[Civil 2011 v1.1] [Civil 2011 v2.1]

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6. Auto termination option in the pushover analysis

• When the axial hinge of column, wall or truss element reaches buckling in the pushover

analysis, the program can automatically stop running with a warning message and save the

results up to the terminated step.

• Analysis results can be checked up to the terminated step.

Design > Pushover Analysis > Pushover Global Control

Documents

Civil 2011 (v2.1)Release Note - CSPFea · 2016-09-17 · midas Civil 3/ 14 Civil 2011(v2.1) Release Note 1. Railway train loads as per EN 1991-2: 2003 Rail traffic actions as per