1 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Structural Design and Stability

2 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Structural Building Design

Seismic analysis & soil mechanic

Wind impact

Materials modeling

Structural integrity

• Bridge design • Tunnel excavation • Dams • Skyscrapers

3 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Construction Structure and Sub-Structures

Design of a new structure for a given construction: • Possibly very complex geometries involved • Non-linear material properties (Steel, concrete, wood, glass)

involved • Assembly of large number of parts • Estimation of lifespan considering

– Service load, including weather condition – Extreme situation – Fatigue analysis

Maintenance and repair of existing structures • Age-related structure deterioration:

– Damage such as deformation, fatigue, breakage, etc. – Cost-effective and safety related decision: maintenance vs.

replacement

Von Mises stress simulation showing distributed stress along all elements of a

derrick

Von Mises stress contours on the substructure.

Courtesy AKERE ENERGY, C.A.

4 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Transportation Engineering: Selection of Material

Complex structure modeling • Wood or steel material selection for the deck based on

– Cost – Noise – Maximum loading capacity

• Estimation of the maximal loading capacity – Accurate load and stress distribution though the material – Modeling of non-linear response such as plasticity and lateral

buckling – Non-linear contact between various parts such as bolts,

beam, stringer, deck • Qualification for higher maximum loading capacity

assisted by accurate, non-linear structural modeling

Modeling the influence of material (wood vs. steel) in a temporary bridge

Floor Beam

Stringer

Deck

CAD model of TMS temporary bridge construction and military vehicle

5 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Transportation Engineering: Suspended Bridge

Cost-effective, safe design for a suspended bridge require careful analysis of each component

Checking of tension, compression and bending effects

Loads modeling • Moving loads (traffic loads) • Surface loads (Overloads) • Pre-stressing tendons

Analysis of the slab section

6 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Geotechnical Engineering: Earthquakes

Deformation of a hospital masonry structure due to a code earthquake event

• Challenges – Earthquake resistance is a critical building

criteria in some regions – Extremely difficult to test real size problem

leading to excessive and costly safety margin – Need to plan for very unlikely events – Soil and rock mechanic is adding more

uncertainty to the problem

• Engineering Simulation Benefits – Modal analysis – Calculation of the induced stress and

deformations in complex geometries – Modeling the residual resistance of the

deteriorate building – Cost effective testing of extreme and unlikely

event such as the ‘Big One’

Result of masonry failure criteria test on a selected building part

7 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Geotechnical Engineering: Soil and Rock Mechanic

Contours of the 3rd principal stress (unit / KPa)

• Challenges – Ensure long term stability of the construction – Proper definition of boundary conditions – Soil variability and properties – Stress dependent material properties

• Volume change, stress-strain relationship, strength

• Engineering Simulation Benefits – Virtual Prototyping

• Investigating the behavior of the construction in its future underground environment

– Accurate modeling of the soil anf rock mechanic • e.g. Cap Drucker-Prager plasticity model

Total Displacement Vector (unit / m)

Courtesy of Wu Han University and the Power Supply Bureaui, China

8 © 2014 ANSYS, Inc. November 23, 2014 ANSYS Confidential

Internal Components: Floating Staircase Design

Loading variations analysis for two staircase configurations: angled and

curved .

FEA results of staircase analysis

• Challenges – Designing innovative staircases while

ensuring safety – Testing unusual configurations (several

person standing on the staircase) – Material selection – Impact of the equipping on ventilation and

comfort

• Engineering Simulation Benefits – Prediction of stress, strain and displacement – Interpretation of results into safety factor – Virtual prototyping – Cost effective testing of new, innovative

configuration

Courtesy of Scott Taylor