Structural Safety and Design
Objectives
At the end of the curricular unit the student should attain the following objectives:
(0) Understand the concept of influence line of internal force/ external reaction and displacements and calculate the corresponding function for isostatic structures;
(1) Understand the fundamental concepts of risk analysis and safety management in civil engineering and their importance on the process of decision making;
(2) To define in a quantitative manner the safety of a structure in a probabilistic and semi-probabilistic framework;
(3) To apply the methods for safety check of structures according to the current codes and standards, in particular the partial safety factors method;
(4) To identify actions on structures, self weight, live loads, snow, wind and earthquakes;
(5) To quantify and combine actions on structures according to current codes and standards;
(6) Design of simple steel and reinforced concrete structures.
General characterization
Code
12661
Credits
6.0
Responsible teacher
Eduardo Soares Ribeiro Gomes Cavaco, Rodrigo de Moura Gonçalves
Hours
Weekly - 4
Total - 63
Teaching language
Português
Prerequisites
In order to attend this curricular unit, it is assumed that students have already acquired basic knowledge of Probability and Statistics and Structural Mechanics, the latter transmitted in the curricular units of Statics, Mechanics of Continuous Media and Strength of Materials.
Bibliography
Notes on Structural Safety, L.C. Neves and A.R. Barbosa, Universidade Nova de Lisboa
EN 1990: Eurocode - Basis of structural design
EN 1991: Eurocode 1 - Actions on structures
EN 1998: Eurocode 8 - Actions on structures
Designers'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' Guide to EN 1990 Eurocode: Basis of structural design, H. Gulvanessian, J.-A. Calgaro, M. Holicky
Handbook 1 Basis of structural design, Leonardo da Vinci Pilot Project CZ/02/B/F/PP-134007
Handbook 2 Reliability backgrounds, Leonardo da Vinci Pilot Project CZ/02/B/F/PP-134007
Handbook 3 Action effects for buildings, Leonardo da Vinci Pilot Project CZ/02/B/F/PP-134007
Teaching method
The unit is composed by a set of theoretical and practical classes, with the objective of allowing students the understanding and application of fundamental principles of structural safety, from the risk analysis background to the application of codes. The theoretical classes focus on the background for existing codes, as the practical classes focus on application of this knowledge considering the existing codes.
Presence in practical classes is mandatory. The faculty code is followed, and the student must attain a minimum of 2/3 of the practical classes. The final classification corresponds to the average of 3 mid-term tests (each one including 1/3 of the course syllabus) or to the classification of a final exam about the full course syllabus.
Evaluation method
The calculation of the final classification obtained in normal season corresponds to the average of the classifications obtained in 2 tests, each corresponding to 1/2 of the subject taught. At the time of appeal, the final classification will correspond to the classification of an exam covering the entirety of the exposed material.
Subject matter
- Introduction.
- Influence Lines of isostatic structures (direct and indirect methods);
- Concepts of Risk, Probability of failure and Consequences (direct, undirect and total) and structural reliability.
- Methods to quantify structural safety (Level 1,2,3 and 4).
- Global safety factor method.
- Partial safety factor method. Mean, characteristic and design values of actions and resistance.
- Actions quantification.
- Self-weigh and live loads.
- Snow load.
- Wind load.
- Seismic action.
- Design of simple reinforced concrete structures (slabs, beams and columns).
- Design of simple steel structures (trussed systems and columns).
- Software of structural analysis (SAP2000).