Elastoplastic Analysis of a Metallic Mast with Stiffeners, Experimentation and Numerical Simulation
Keywords:
Material Behavior, Masts deflection tests, numerical simulation , Optimization, Masts, Metallic StandardsAbstract
This work entitled- Elastoplastic Analysis of a Metallic Mast with Stiffeners- is devoted to optimize the weight of masts. These masts are made of steel and have a conical geometry with constant thickness. The masts are considered clamped at their lower basis in soil. The masts should resist to the applied loads which are self weight, wind and equipments. Firstly, two types of design have been proposed to pursue this study; Type A consists of adding longitudinal stiffeners and type B consists of changing the whole shape of the masts section. Deflection tests will be applied to the type A of masts according to the metallic standards, these same tests will be applied also on normal masts. The test results will be analyzed to study the effects of the stiffeners on the mechanical behavior of the masts. Many computational cycles are realized by a numerical software to prove that we have the same results on the type A masts either by experimental tests or numerical simulation, hence, we will analyze the mechanical behavior of type B by using only the mumerical simulation method. The results have shown that both type A and type B allow a considerable weight optimization. Finally, an analysis of the two solutions proposed will be done in order to determine the advantages and disadvantages of each one of them.
References
2. Règles NV65 et N84 modifiées 95: Règles définissant les effets de la neige et du vent sur les constructions et annexes, Douzième édition, Eyrolles.
3. NF EN 1993-3-1. Eurocode 3: Calcul des structures en acier. Partie 3-1: Tours, mâts et cheminées - Pylones et mâts haubanés. AFNOR 2007; 1-82.
4. NF EN 1991-1-4. Eurocode 1: Actions sur les structures. Partie 1-4: Actions générales - Actions du vent. AFNOR 2005; 1-125.
5. Save MA, Massonnet CE, De Saxce G. Plastic limit analysis of plates, shells and disks. 2nd Ed. The Netherlands: Elsevier Sciences B. V, 1997.
6. EN40-2. Candélabre d’éclairage public. Partie 2: Prescriptions générales et dimensions. AFNOR 2005; 1-24.
7. Rahui S, Dirhar MA, Jalal SE, Bousshine L, El Maskaoui Z, Mechanical strength of public lighting masts, ACMA 2014; 1-4.
8. EN40-3-2. Candélabre d’éclairage public. Partie 3-2: Conception et vérification: vérification par essais. AFNOR 2000; 1-16.
