Technical reference manual v8i

STAAD.Pro V8i (SELECTseries 1) Technical Reference Manual DAA037780-1/0002 Last updated: 23 June 2010 Copyright Information Trademark Notice Bentley, the "B" Bentley logo, STAAD.Pro are registered or nonregistered trademarks of Bentley Systems, Inc. or Bentley Software, Inc. All other marks are the property of their respective owners. Copyright Notice © 2009, Bentley Systems, Incorporated. All Rights Reserved. Including software, file formats, and audiovisual displays; may only be used pursuant to applicable software license agreement; contains confidential and proprietary information of Bentley Systems, Incorporated and/or third parties which is protected by copyright and trade secret law and may not be provided or otherwise made available without proper authorization. Acknowledgments Windows, Vista, SQL Server, MSDE, .NET, DirectX are registered trademarks of Microsoft Corporation. Adobe, the Adobe logo, Acrobat, the Acrobat logo are registered trademarks of Adobe Systems Incorporated. Restricted Rights Legends If this software is acquired for or on behalf of the United States of America, its agencies and/or instrumentalities ("U.S. Government"), it is provided with restricted rights. This software and accompanying documentation are "commercial computer software" and "commercial computer software documentation," respectively, pursuant to 48 C.F.R. 12.212 and 227.7202, and "restricted computer software" pursuant to 48 C.F.R. 52.227-19(a), as applicable. Use, modification, reproduction, release, performance, display or disclosure of this software and accompanying documentation by the U.S. Government are subject to restrictions as set forth in this Agreement and pursuant to 48 C.F.R. 12.212, 52.227-19, 227.7202, and 1852.227-86, as applicable. Contractor/Manufacturer is Bentley Systems, Incorporated, 685 Stockton Drive, Exton, PA 19341- 0678. Unpublished - rights reserved under the Copyright Laws of the United States and International treaties. Technical Reference Manual — i End User License Agreement To view the End User License Agreement for this product, review: eula_ en.pdf. ii — STAAD.Pro Table of Contents Introduction 1 Section 1 General Description 3 1.1 Introduction 4 1.2 Input Generation 5 1.3 Types of Structures 5 1.4 Unit Systems 6 1.5 Structure Geometry and Coordinate Systems 6 1.6 Finite Element Information 18 1.7 Member Properties 34 1.8 Member/ Element Release 43 1.9 Truss/Tension/Compression - Only Members 43 1.10 Tension, Compression - Only Springs 44 1.11 Cable Members 44 1.12 Member Offsets 47 1.13 Material Constants 48 1.14 Supports 48 1.15 Master/Slave Joints 49 1.16 Loads 49 1.17 Load Generator 57 1.18 Analysis Facilities 60 1.19 Member End Forces 82 1.20 Multiple Analyses 88 1.21 Steel, Concrete, Timber Design 89 1.22 Footing Design 89 1.23 Printing Facilities 89 1.24 Plotting Facilities 89 1.25 Miscellaneous Facilities 89 1.26 Post Processing Facilities 90 Section 2 American Steel Design 91 Technical Reference Manual — iii 2.1 Design Operations 92 2.2 Member Properties 92 2.3 Allowables per AISC Code 96 2.4 Design Parameters 100 2.5 Code Checking 108 2.6 Member Selection 109 2.7 Truss Members 110 2.8 Unsymmetric Sections 110 2.9 Composite Beam Design as per AISC-ASD 110 2.10 Plate Girders 112 2.11 Tabulated Results of Steel Design 113 2.12 Weld Design 116 2.13 Steel Design per AASHTO Specifications 119 2.14 Steel Design per AISC/LRFD Specification 154 2.15 Design per American Cold Formed Steel Code 170 2.16 Castellated Beams 177 2.17 Steel Design per the AISC Unified 360-05 Steel Design Spec- ification 188 Section 3 American Concrete Design 197 3.1 Design Operations 198 3.2 Section Types for Concrete Design 198 3.3 Member Dimensions 199 3.4 Design Parameters 199 3.5 Slenderness Effects and Analysis Consideration 203 3.6 Beam Design 204 3.7 Column Design 209 3.8 Designing elements, shear walls, slabs 214 Section 4 American Timber Design 227 4.1 Timber Design 227 4.2 Design Operations 239 4.3 Input Specification 242 iv — STAAD.Pro 4.4 Code Checking 243 4.5 Orientation of Lamination 243 4.6 Member Selection 244 Section 5 Commands and Input Instructions 251 5.1 Command Language Conventions 253 5.2 Problem Initiation And Title 259 5.3 Unit Specification 260 5.4 Input/Output Width Specification 262 5.5 Set Command Specification 262 5.6 Separator Command 270 5.7 Page New Command 270 5.8 Page Length/Eject Command 271 5.9 Ignore Specifications 271 5.10 No Design Specification 272 5.11 Joint Coordinates Specification 272 5.12 Member Incidences Specification 276 5.13 Elements and Surfaces 279 5.14 Plate Element Mesh Generation 285 5.15 Redefinition of Joint and Member Numbers 292 5.16 Entities as single objects 293 5.17 Rotation of Structure Geometry 298 5.18 Inactive/Delete Specification 299 5.19 User Steel Table Specification 300 5.20 Member Property Specification 309 5.21 Element/Surface Property Specification 338 5.22 Member/Element Releases 340 5.23 Member Truss/Cable/Tension/Compression Specification 345 5.24 Element Plane Stress and Ignore Inplane Rotation Specifications 352 5.25 Member Offset Specification 353 5.26 Specifying and Assigning Material Constants 355 Technical Reference Manual — v 5.27 Support Specifications 375 5.28 Master/Slave Specification 390 5.29 Draw Specifications 392 5.30 Miscellaneous Settings for Dynamic Analysis 392 5.31 Definition of Load Systems 394 5.32 Loading Specifications 484 5.33 Reference Load Cases - Application 573 5.34 Frequency Calculation 574 5.35 Load Combination Specification 576 5.36 Calculation of Problem Statistics 579 5.37 Analysis Specification 579 5.38 Change Specification 610 5.39 Load List Specification 611 5.40 Load Envelope 613 5.41 Section Specification 613 5.42 Print Specifications 615 5.43 Stress/Force Output Printing for Surface Entities 620 5.44 Printing Section Displacements for Members 622 5.45 Printing the Force Envelope 624 5.46 Post Analysis Printer Plot Specifications 625 5.47 Size Specification 625 5.48 Steel and Aluminum Design Specifications 626 5.49 Group Specification 632 5.50 Steel and Aluminum Take Off Specification 634 5.51 Timber Design Specifications 635 5.52 Concrete Design Specifications for beams, columns and plate ele- ments 637 5.53 Footing Design Specifications 641 5.54 Shear Wall Design 641 5.55 End Run Specification 644 Index 645 vi — STAAD.Pro Index of Commands 653 A, B 653 C 653 D 653 E 653 F 653 G 653 H 654 I 654 J, K 654 L 654 M 654 N 654 O 654 P 654 Q, R 655 S 655 T 655 U, V, W, X, Y, Z 655 Technical Support 657 Technical Reference Manual — vii [...]... the BETA 0 condition A direction vector is created by the program as explained in section 5.26.2 of this manual The program then calculates the Beta Angle using this vector 14 — STAAD.Pro Figure 1.8 Figure 1.9 Technical Reference Manual — 15 Figure 1.10 16 — STAAD.Pro Figure 1.11 Technical Reference Manual — 17 Figure 1.12 1.6 Finite Element Information STAAD is equipped with a plate/shell finite element,... prismatic shapes etc Fig 1.6 shows local axis system(s) for these shapes Figure 1.5a Technical Reference Manual — 9 Figure 1.5b 10 — STAAD.Pro Figure 1.6a - Local axis system for various cross sections when global Y axis is vertical Note: The local x-axis of the above sections is going into the paper Technical Reference Manual — 11 12 — STAAD.Pro Figure 1.6b - Local axis system for various cross sections... system Reference Point An alternative to providing the member orientation is to input the coordinates (or a joint number) which will be a reference point located in the member x-y plane (x-z plane for SET Z UP) but not on the axis of the member From the location of the reference point, the program automatically calculates the orientation of the member x-y plane (x-z plane for SET Z UP) Technical Reference. .. Introduction Section 1 of the manual contains a general description of the analysis and design facilities available in the STAAD engine Specific information on steel, concrete, and timber design is available in Sections 2, 3, and 4 of this manual, respectively Detailed STAAD engine STD file command formats and other specific user information is presented in Section 5 Technical Reference Manual — 1 Introduction... automatically calculates the orientation of the member x-y plane (x-z plane for SET Z UP) Technical Reference Manual — 13 Reference Vector This is yet another way to specify the member orientation In the reference point method described above, the X,Y,Z coordinates of the point are in the global axis system In a reference vector, the X,Y,Z coordinates are specified with respect to the local axis system of the... analysis This results in a faster and more economic solution for the user The degrees of freedom associated with frame elements of different types of structures is illustrated in Figure 1.1 Technical Reference Manual — 5 Figure 1.1 - Degrees of freedom in each type of Structure 1.4 Unit Systems you is allowed to input data and request output in almost all commonly used engineering unit systems including... cylindrical type coordinate system (Fig 1.4) where the R- Ø plane corresponds to the X-Z plane of the cartesian system The right hand rule is followed to determine the positive direction of the Y axis Technical Reference Manual — 7 Figure 1.2 : Cartesian (Rectangular) Coordinate System Figure 1.3 : Cylindrical Coordinate System Figure 1.4 : Reverse Cylindrical Coordinate System 8 — STAAD.Pro 1.5.2 Local Coordinate... Release 43 1.9 Truss/Tension/Compression - Only Members 43 1.10 Tension, Compression - Only Springs 44 1.11 Cable Members 44 1.12 Member Offsets 47 1.13 Material Constants 48 1.14 Supports 48 Technical Reference Manual — 3 1.15 Master/Slave Joints 49 1.16 Loads 49 1.17 Load Generator 57 1.18 Analysis Facilities 60 1.19 Member End Forces 82 1.20 Multiple Analyses 88 1.21 Steel, Concrete, Timber Design... surface in local directions 6 Temperature load due to uniform increase or decrease of temperature 7 Temperature load due to difference in temperature between top and bottom surfaces of the element Technical Reference Manual — 19 Figure 1.13 Theoretical Basis The STAAD plate finite element is based on hybrid finite element formulations A complete quadratic stress distribution is assumed For plane stress action,... component of an adjacent element which is at an angle to the first (see Fig below) is achieved by the elements This compatibility requirement is usually ignored in most flat shell/plate elements Technical Reference Manual — 21 Figure 1.16 2 The out of plane rotational stiffness from the plane stress portion of each element is usefully incorporated and not treated as a dummy as is usually done in most commonly . 654 P 654 Q, R 655 S 655 T 655 U, V, W, X, Y, Z 655 Technical Support 657 Technical Reference Manual — vii Introduction Section 1 of the manual contains a general description of the analysis. STAAD.Pro V8i (SELECTseries 1) Technical Reference Manual DAA037780-1/0002 Last updated: 23 June 2010 Copyright Information Trademark. 2, 3, and 4 of this manual, respectively. Detailed STAAD engine STD file command formats and other specific user information is presented in Section 5. Technical Reference Manual — 1 Introduction 2