- Docente: Massimo Majowiecki
- Credits: 6
- SSD: ICAR/09
- Language: Italian
- Teaching Mode: Traditional lectures
- Campus: Bologna
-
Corso:
Second cycle degree programme (LM) in
Civil Engineering (cod. 0930)
Also valid for Second cycle degree programme (LM) in Civil Engineering (cod. 8211)
Course contents
1. INTRODUCTION: STRUCTURES DESIGN AND ARCHITECTURE
a) Current aspects of structural
architecture and technological ethics
b) Design as conceptual holistic
synthesis
c) Workflow of the design process
d) From massive to light structures
e) The arch, the rope and the beam
2. INTRODUCTION TO STRUCTURE DYNAMICS
a) Single dof
- Free vibrations
- Harmonic force
- Duhamel's integral
b) Multiple dofs
- Modal analysis
- Response spectrum
analysis
3. TRUSS STRUCTURES
a) Typologies
- One layer structures:
simple and double courvature
- Multiple layers: plane
single and double courvature
b) Morphology of spatial truss
structures
- Foundamental shapes
- Formex algebra
- Free form structures
(NURBS)
- Shape optimization –
Addressed topic I
- Topological description of
truss structures: Tu Delft
- Equilibrium stability for
single layer truss structures - Addressed topic II
- Materials and structural
details (nodes,constrains, tolerances)
- Assembling methods
- Examples
5. TENSOSTRUCTURES
a) Suspension and cable-stayed
bridges
- Typologies
- Pedestrian footbridges
comfort - Addressed topic III
- Examples
b) Suspended roofs: tensostructures
mechanics
- The rope structural
element: the f/l ratio
- Geometric stabilization for
isolated ropes
- Stabilization of plane
cable systems
- Roof systems generated by
plane tensostructural systems
- Spatial systems: hyperbolic
paraboloid, free form nets, double layer nets, pneumatic
structures, membranes.
- Pre-stressed
membranes
- Design of the geometric and
tensional initial state: State 0
- The architectural
model
- The mathematical model:
geometry as a consequence of the stress state
- Computational design of the
State 0
- Approximated analyses
- The state variation: load
cases and resistance assessment – Addressed topic IV
- Materials and structural
details (ropes, anchorages)
- High resistance structural
membranes
- Examples
4. HYBRID STRUCTURAL SYSTEMS, TENSEGRITY AND OPENABLE ROOFING
SYSTEMS
a) Reinforced beams
- Historic evolution
(Polonceau and reinforced arch)
- Typologies
- Axial stress in trusses for
hybrid structures
- Pretension (control of
stresses/displacements)
- Methods for inducing
pretension
- Examples
b) Tensegrity
- Elementary cells
- Application to
roofing
- Examples of existing
structures
- Examples of openable
roofing
5. WIND EFFECTS ON STRUCTURES
a) The wind action
b) Aerodynamic instabilities
- Vortex shedding
- Torsional divergence
- Galloping
- Flutter
c) CFD in wind engineering
Assessment methods
The exame consists in the developement and presentation of a
project on the base of the structural typologies presented in the
course. The activity must be accoplished in groups (maximum 3
students). The project must include:
1. Motivations for the structural typology
2. Load analysis
3. Preliminar structural model
4. Structural elements pre-design
5. Outline of the most relevant structural
details
Office hours
See the website of Massimo Majowiecki