midas Gen Release Note

Transcription

1 Gen 2014 Integrated Design System for Building and General Structures midas Gen Release Note Release Date : May. 28, 2014 Product Ver. : 2014(v2.1) Gen 2014 (v2.1) Release Note

2 Gen 2014 (v2.1) Release Note Enhancements Analysis & Design 3 (1) Addition of Singapore National Annex in Eurocode (2) User-defined Shear Length in Pushover Analysis as per EN1998-3:2004 (3) Improvements on Eurocode Load Combination (4) Improvements on Punching Shear Checking as per EN :2004 (5) Same Beam Rebar at Joints (6) Cracked Section Stress in GSD (7) Damping Constant in Surface Spring Support Pre & Post-Processing (1) Improvements on Revit 2014 Interface (2) Addition of Group Column in Elastic Link Result Table (3) Unit Option for Tables and Graphs in Dynamic Report 11

3 1. Addition of Singapore National Annex in Eurocode Steel material data base as per BC1:12, Appendix A is implemented. Design parameter p y and f y are applied in the steel code checking by different steel grades and thickness. Static Wind Load as per NA to SS EN :2009 is implemented. In Singapore National Annex, structure type is used instead of terrain category. Also fundamental basic wind velocity is applied as 20m/s and air density, ρ, is applied as 1.194kg/m 3. Response Spectrum Function and Static Seismic Load as per NA to SS EN :2013 is implemented. In Singapore National Annex, only horizontal spectrum is required and ground type is limited as C, D, and S1. Also reference ground acceleration is applied as 0.175m/s 2. Model > Properties > Materials Load > Lateral Loads > Wind Loads / Static Seismic Loads Load > Response Spectrum Analysis Data > Response Spectrum Functions Material Properties Static Wind Load Response Spectrum Function 3 / 12

4 midas Gen Analysis & Design Enhancement Gen 2014 (v2.1) Release Note Steel, Concrete, and Footing load combination as per NA to SS EN 1990 is implemented. Default values of factors for variable actions (Ψ) and partial factors for actions (γ) are changed based on the specified national annex. Concrete design as per NA to SS EN :2008 is implemented. For RC beam, column, slab, and wall, ultimate limit state and service limit state design are supported. Steel design as per NA to SS EN :2010 is implemented. Steel code checking is provided for ultimate and service limit state verification. Steel optimal design can be used based on the strength verification. Results > Combinations Design > Concrete Design Parameter > Design Code Design > Steel Design Parameter > Design Code Concrete Code Design Steel Code Checking & Optimal Design 4 / 12

5 2. User Defined Shear Length in Pushover Analysis as per EN :2004 In the previous version, when calculating total rotation at yielding and ultimate, Ratio of moment /shear at the end section, Lv was always applied as 50% of member length. Now, the value of Lv can be specified by the user as an relative length or absolute length. Shear length, Lv, is activated in RC/SRC Beam, Column, and Walls with Moment-Rotation(M-θ) hinge. Design > Pushover Analysis > Define Pushover Hinge Properties Total Chord Rotation Capacity (EN1998-3:2004, Annex A.3.1) Limit State of Near Collapse Limit State of Significant Damage Limit State of Damage Limitation ¾ of the ultimate chord rotation, θum Define Pushover Hinge Properties 5 / 12

6 3. Improvements on Eurocode Load Combination Different value of Psi factor can be defined in the table format. This feature is useful when a building is composed of different area such as residential, office, and shopping area since different Ψ factor for imposed load can be specified by categories. Temperature load case is now considered in the automatic generation of load combination as per Eurocode. Results > Combinations Load Combination Category B: Office Area Category D: Shopping Area 6 / 12

7 4. Improvements on Punching Shear Checking as per EN :2004 Control perimeter at which shear reinforcement is not required, u out, eff, is added in the text format report. In the previous version, punching shear check was skipped if the element type of column is truss. Truss element can now be considered in punching shear check. Design > Meshed Slab/Wall Design > Punching Shear Check Punching Shear Check 7 / 12

8 5. Same Beam Rebar at Joints In concrete code design, identical rebar will be provided in the adjacent ends. If the required rebar area is different between two beams, greater rebar area will be applied. Elements with identical section IDs and material IDs can be assigned. When All is selected for Member Select option, the program can automatically detect members to have identical rebars. Design > Concrete Design Parameter > Same Beam Rebar at Joints Equalize Beam Rebar Data 8 / 12

9 6. 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 simply considered by using the user-defined ratio of modulus elasticity of 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 Elastic Behavior Cross Section at Crack Transformed Section Strain Distribution Stress Distribution Cracked Section Stresses in midas GSD 9 / 12

10 7. Damping Constant in Surface Spring Support 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 automatically entered at each node represented by concentrated stiffness and damping constant. it is converted to the element support. In 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 > Point Spring Supports Model > Boundaries > Surface Spring Supports 10 / 12

11 Pre/Post-Processing Enhancement Gen 2014 (v2.1) Release Note 1. Improvements on Revit 2014 Interface In the previous version, the user needed to write or modify section and material mapping file in text format file. In the new version, auto-detecting function using DB section/material name has been newly added. The user can also manually add mapping data in the dialog box more easily. Boundary conditions and loads can now be imported from Revit to midas Gen. File > Import > midas Gen MGT File Section Mapping Dialog Box Revit 2014 Gen 2014 Linear Elements Functions Revit <> Gen Structural Column <> Beam <> Brace <> Curved Beam > Beam System > Truss > Foundation Slab <> Structural Floor <> Planar Structural Wall <> Elements Wall Opening & Window > Boundary Load Other Parameters 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 <> Level > 11 / 12

12 Pre/Post-Processing Enhancement Gen 2014 (v2.1) Release Note 2. 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 3. 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 12 / 12