35125 - Building Techniques M (A-K)

Learning outcomes

The course aims at providing the design techniques for the main structural typologies and the expertise for the critic examination of the actual technical codes.

Real examples and applications teach the right way to face the structural design.

Course contents

Structural Reliability:

Random Variable (RV). Discrete RV. Histograms. PDF (Probability Density Function). Mean, variance, coefficient of variation. Continuous RV. Probability Density Function) and CDF (Cumulative Distribution Function). Mean, variance, coefficient of variation, median. Distributions: Gauss, standard Gauss function  fi(s), uniform. Tables of function  fi(s). Characteristic value (fractile 5%). numerical definition of characteristic values. statistical independence of RV. Serial and parallel structures. RV sum of RVs. The fundamental case. Limit state function g(x)=R-S. Reliability index Beta. Observation on the fundamental case.

Beam systems:

Rigid connection, semi-rigid connection, hinge connection. Equilibrium method. Classical stiffness matrix (direct method calculation). Geometric stiffness matrix. Simplified method. General method (total energy theorem). P-Delta method. Use of commercial software.

Shell structures:

Plane structures with in-plane load. Slabs of revolution . Membrane of revolution. Examples for slabs and membranes. Cylindrical r.c. tank. Prestressed tanks. Spherical membrane. Semi-spherical membrane. Conical membrane. Displacements and deformations of membranes. Foundation hoop. Spheric dome: Geckeler solution.

Prestress r.c. structures:

Basic theory. Prestress techniques. Stress and strain calculation for statically determined structures. Tension for sliding and adherent cables. Bending for sliding and adherent cables. Post-tension techniques. Technical codes verifications. Structural details and local verifications. Tension loss.

 

Readings/Bibliography

Ang - Tang, "Probability concepts in engineering palnning and design. Vol. 1: Basic principles", John Wiley, New York, 1975 (per l'affidabilità strutturale).

Ang - Tang, "Probability concepts in engineering palnning and design. Vol. 2: Decision, risk and reliability", John Wiley, New York, 1984 (per l'affidabilità strutturale).

Pozzati, P., Ceccoli, C., "Teoria e Tecnica delle Strutture", UTET, Torino, 1972 (per i sistemi di travi).

Belluzzi, O., "Scienza delle Costruzioni" (per le lastre di rivoluzione).

Lancellotta, R., Lcalavera, J., "Fondazioni", McGraw-Hill, Milano, 1999 (per le fondazioni).

Lancellotta, R., "Geotecnica", Zanichelli, Bologna, 1987 (per le fondazioni).

Walther, R., Miehlbradt, M., "Progettare in calcestruzzo armato", Hoepli editore, Milano, 1990 (per il calcestruzzo armato ordinario e precompresso).

Cestelli-Guidi, C., "Cemento armato precompresso", settima edizione,  Hoepli editore, Milano, 1987 (per il calcestruzzo armato precompresso).

Teaching methods

Oral lectures with prevalent use of blackboard.

Exercise: examples and exercise of application of the most relevant code rules.

Assessment methods

Oral exam.

Teaching tools

Lectures notes.

Photocopies of technical documentation.

Office hours

See the website of Claudio Ceccoli