Release Note Release Date : July. 2014 Product Ver. : Civil 2015 (v1.1) 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
Enhancements 3 (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 Pre & Post-Processing (1) Revit 2014 Interface 14 (2) Improvements on Composite Section Properties (3) Addition of UK 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
1. Steel Composite Girder Design as per AASHTO LRFD 2007, 2012 Straight or curved steel composite bridge design for I, Tub and Box sections as peraashto LRFD Bridge Design Specifications is now available. Long term effects can be simulated using modular ratio (n) or time dependentmaterial definition. Both composite steel bridge models with and without construction stages are supported in Composite Steel Girder Design. Design forces or moments classified as Dead(Before Composite), Dead (After Composite) and Short Term loads can be seen in Design 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 Result Diagram is available for forces and stresses. Design > Composite Design > AASHTO-LRFD 07,12 3 / 21
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 b ridge 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, andstresses). In Composite Steel Girder Design tab, Dead Load(CS) is used for defining load factor ofbefore composite dead load case. For the dead loads after composite action, the user has to specify Erection Load cases in Construction Stage Analysis Control dialog box. Results > Load Combination Load Combination Type Load Combinations 4 / 21
3. Composite Steel Bridge Load Rating as per AASHTO LRFR 2011 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 aboutthe most critical element along with the rating factor, weightin tonnage and safe load capacity of the bridge. Design result diagram for forces and stress can be viewed. Rating > Steel Bridge > AASHTO-LRFD 12 5 / 21
4. PSC Composite Girder Design as per EN1992-2:2005 General type PSC composite section design (including manystandard PSC sections invalue type DB) is now available as peren1992-2:2005. Composite section for construction stages considering time dependent material can be considered with consideration oftendons 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 PSC Design Result Diagram PSC Design Parameter 6 / 21
PSC Design Excel Report 7 / 21
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 undercs: Erection Load. In the previous version, only oneerection load case was able to be defined. In the newversion, up to 3 erection load cases can be defined. This feature is very useful to distinguish Dead Load ofcomponent (DC) and Dead Load ofwearing Surfaces (DW) for different load factors when generating load combinations as per AASHTO LRFD. Analysis > Construction Stage Analysis Control Enter Erection Load Case Name Dead Load of Component (DC) Dead Load of Wearing Surfaces (DW) 8 / 21
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 Stiffness Scale Factor boundarygroups. [Update Long Term] button is added to automaticallyactivate the long-term boundarygroups atthe construction stages that concrete decks are activated. Analysis > Construction Stage Analysis Control Modular Ratio for Long-term Effects Automatic Generation of Stiffness Scale Factor 9 / 21
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 loaddata based ondean(1970) Graph andlemehaute (1979) Graph. Load > Settlement/Misc. > Wave Loads Wave Load Validation Check 10 / 21
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 FCM Camb er and General 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. Load > Construction Stage Loads > Camber for Construction Stage Results > Deformations > Deformed Shape / Displacement Contour Displacement without considering Camber Displ. Option Displacement with considering Camber Displ. Option FCM Camber Table Construction Stage Analysis Control Deformed Shape Dialog Box 11 / 21
9. Damping Constant in Spring Supports Damping coefficient can be specified in Point Spring Supports and Surface Spring Supports. Model > Boundaries > Point Spring Supports Model > Boundaries > 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 byconcentrated stiffness and da mping constant. itis converted to the element support. In case ofpoint 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. 12 / 21
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 ofreinforcement. The effect of creep on the stresses is simplyconsidered byusing the user-defined ratio of modulus elasticityof reinforcement to concrete. It is assumed that the tensile strength ofconcrete is zero. The neutral axis depth is determined using cracked transformed section approach. Tools > General Section Designer Cracked Elastic Behavior Cross Section at Crack Transformed Section Strain Distribution Stress Distribution Cracked Section Stresses in midas GSD 13 / 21
Pre & Post-Processing 1. Revit 2014 Interface 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. File > Import > midas Civil MCT File Send Model to midas Civil Revit 2014 Civil 2015 Linear Elements Planar Elements Boundary Load Other Parameters Functions Revit <> Civil Structural Column <> Beam <> Brace <> Curved Beam > Beam System > Truss > Foundation Slab <> Structural Floor <> Structural Wall <> Wall Opening & Window > Door > Vertical or Shaft Opening > Offset > Rigid Link > Cross-Section Rotation > End Release > Isolated Foundation Support > Point Boundary Condition > Line Boundary Condition > Wall Foundation > Area Boundary Condition > Load Nature > Load Case > Load Combination > Hosted Point Load > Hosted Line Load > Hosted Area Load > Material <> 14 / 21
Pre & Post-Processing 2. Improvements on Composite Section Properties 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 peraashto LRFD 07&12. File > Import > midas Civil MCT File Stiffener Type Flat Tee U-Rib Stiffener Position Both Left Right Longitudinal Stiffener Steel-Tub Composite Section 15 / 21
Pre & Post-Processing 3. Addition of UK DB Sections for PSC Value Type Following section database ofpsc Value type has been newlyadded: 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. Properties > Section Properties PSC Section Database for Composite Sections 16 / 21
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 Template Wizard 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 17 / 21
Pre & Post-Processing 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 bedirectly 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 18 / 21
Pre & Post-Processing 6. Displacements according to Node Local Axis 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 atthe bearing positions ofthe curved bridge. Results > Deformations > Deformed Shape / Displacement Contour Results > Results Tables > Displacements > Displacements(Local) tab Node Local Axis Displacements in Node Local Axis 19 / 21
Pre & Post-Processing 7. Improvements on Dialog Boxes to be more User Friendly when using 1024*768 Resolution Some dialog boxes can now be resized by hiding some ofthe information to better fit smaller resolution screens. Load > Temp./Prestress > Tendon Profile Load > Moving Load > Traffic Line Lanes Tendon Profile Traffic Line Lane 20 / 21
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 9. Unit Option for Tables and Graphs in Dynamic Report In the previous version, units of tables and graphs in the dynamic report were always identical to the global unit system. In the new version, unit can be specified by tables and graphs separately. Elastic Link Result Table Tools > Dynamic Report Generator Table/Chart Unit Dialog Box 21 / 21