2008 International ANSYS Conference

Transcription

1 2008 International ANSYS Conference CivilFEM with ANSYS: New advanced NPP features for the Nuclear Renaissance Ph. D. Eduardo Salete Head R&D Ingeciber, s.a ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary

2 What is CivilFEM with ANSYS? CivilFEM is the customized version of ANSYS targeted at the Civil Engineering World wide market. Goals: To position CivilFEM with ANSYS as the ww leading solution of the NPP Civil Engineering and Structural Analysis. To offer capabilities not present in any other software for Civil Nuclear Industry ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary

3 Material Library With time-dependent material properties Non-Linear Materials 2008 ANSYS, Inc. All rights reserved. 3 ANSYS, Inc. Proprietary

4 Concrete Shell Reinforcement Variable depth Variable reinforcement amount in X & Y directions and in Top & Bottom faces for each vertex Non orthogonal reinforcements and variable orientation Tx, Ty, Txy, Mx, My, Mxy, Nx, Ny Reinforcement 2008 ANSYS, Inc. All rights reserved. 4 ANSYS, Inc. Proprietary

5 Concrete Checking and Design Codes EUROCODE 2 ACI 318 Spanish code EHE CEB-FIP (Model Code) British Standard 8110 Australian code (AS3600) Chinese code (GB-50010/ GB-50017) Brazilian code NBR6118 Indian Standard 456 Russian code SP Capabilities Axial + Biaxial Bending Checking and Design Shear & Torsion Checking and Design Shell Reinforcement 2008 ANSYS, Inc. All rights reserved. 5 ANSYS, Inc. Proprietary

6 Steel Checking Codes EUROCODE 3 (European) EA, CTE (Spanish) AISC-LRFD 13 th Edition AISC-LRFD 2 nd Edition AISC-ASD 13 th Edition British Standard 5950:1985 British Standard 5950:2000 Chinese Code GB Others 2008 ANSYS, Inc. All rights reserved. 7 ANSYS, Inc. Proprietary

7 Nuclear Power Plants Additional Nuclear codes: ACI 349 ACI 359 ANSI AISC N ANSI AISC N (LRFD and ASD provisions) ASME B&PV Code Section III, SubSection NF AISC-ASD 9 th Edition 2008 ANSYS, Inc. All rights reserved. 8 ANSYS, Inc. Proprietary

8 Seismic Analysis Utilities to make easier the seismic spectral analyses: Spectrum definition according to codes (Eurocode 8, Spanish, French, Italian, Chinese GB50011, UBC, etc.) Automatic mode combinations according to code specifications. Takes into account positive and negative forces and moments combinations ANSYS, Inc. All rights reserved. 9 ANSYS, Inc. Proprietary

9 Seismic Analysis Non Linear Time History Analysis Push-Over and Retrofit Analysis: From the spectrum definition, it is possible to perform a Push-Over calculation which allows: Analyze the evolutive behavior of the structure. Determine its weak points. Analyze the Retrofit effect ANSYS, Inc. All rights reserved. 10 ANSYS, Inc. Proprietary

10 Prestressed Reinforced Concrete 3D Tendon Editor It allows the definition and edition of the geometric and strength properties of all tendons of a structure. The geometry may be shown and edited either graphically or by coordinates Graphical visualization of all prestressing losses for each tendon along the structure (short term and long term losses) 2008 ANSYS, Inc. All rights reserved. 11 ANSYS, Inc. Proprietary

11 Soil Structure Interaction Direct Foundation Retaining walls Deep Foundation 2008 ANSYS, Inc. All rights reserved. 12 ANSYS, Inc. Proprietary

12 Case Study Case Study: Modification of a Containment Building The cylinder is 20 m. high and has a diameter of 30 m. The dome has a radius of 25 m. The centre of the dome is located in the centre of the base of the cylinder. The wall is 1 meter thick ANSYS, Inc. All rights reserved. 13 ANSYS, Inc. Proprietary

13 Case Study: Shell Elements The cylinder has a line of nodes every 9 degrees. The height of the cylinder is divided into 20 parts. The dome has a free meshing ANSYS, Inc. All rights reserved. 14 ANSYS, Inc. Proprietary

14 Case Study: Tendon Editor 2008 ANSYS, Inc. All rights reserved. 15 ANSYS, Inc. Proprietary

15 Case Study: Prestressing Losses All different losses for every tendon at every cut 2008 ANSYS, Inc. All rights reserved. 16 ANSYS, Inc. Proprietary

16 Case Study: Calculation Steps Step 1: The whole model is calculated subjected to its self weight and an internal pressure of 35 t/m 2. Step 2: A hole is drilled in the cylinder. All the cables attached to this hole disappear. The internal pressure also disappears. Step 3: The hole is refilled with a new concrete. All the cables that had been eliminated are created again. Internal pressure is applied ANSYS, Inc. All rights reserved. 17 ANSYS, Inc. Proprietary

17 Case Study: Sequential Analysis The sequential analysis has been performed using the activation time of the materials as it is shown in the table below. Activation time Deactivation time Component 1 0 Component ,001 Component 3 10, ANSYS, Inc. All rights reserved. 18 ANSYS, Inc. Proprietary

18 Case Study: Creep and Shrinkage Apart from time dependent properties (concrete resistance, elastic modulus, etc.), concrete elements will be subjected to creep and shrinkage. Creep: Step by step method: A non linear analysis is run. At every step the creep coefficient will be updated and new loads will be considered. Effective modulus: Used when loads are applied almost at the same time. An equivalent elastic modulus is considered. Only one analysis is run and the calculation time is reduced in more than ten times. Shrinkage: The user can select the age of concrete at which shrinkage must start ANSYS, Inc. All rights reserved. 19 ANSYS, Inc. Proprietary

19 Case Study: Creep and Shrinkage No creep, step by step or effective modulus option for creep analysis Select the label creep/shrinkage in the material window Shrinkage option and time at which shrinkage must start ANSYS, Inc. All rights reserved. 20 ANSYS, Inc. Proprietary

20 Case Study: Results Axial Force X at time 10,000 Axial Force Y at time 10,002 Bending Moment X at time 10,033.1 Bending Reinforcement (Y dir.) 2008 ANSYS, Inc. All rights reserved. 21 ANSYS, Inc. Proprietary

21 Case Study: Reinforcement of the Cylinder. Horizontal section Vertical section 2008 ANSYS, Inc. All rights reserved. 22 ANSYS, Inc. Proprietary

22 Case Study: Stresses, Forces and Moments in a Solid Section 2008 ANSYS, Inc. All rights reserved. 23 ANSYS, Inc. Proprietary