303 documents found, page 1 of 31
Load bearing capacity of light timber frame walls under fire
Piloto, P.A.G.; Fonseca, E.M.M.Light Timer Frame Walls are made of solid timber elements and are usually fire protected by other materials. This investigation determines the residual load bearing capacity of Light Timber Frame Walls for fire rating periods of 30, 60, 90 and 120 min. The timber frame is made with 3 studs and 2 tracks, using two different fire protection levels (one and two gypsum layers). The computational model includes the ...
Analytical equations applied to the study of steel profiles under fire accordin...
Oliveira, Pedro N.; Fonseca, E.M.M.; Campilho, Raul D.S.G.; Piloto, P.A.G.Some analytical methods are available for temperature evaluation in solid bodies. These methods can be used due to their simplicity and good results. The main goal of this work is to present the temperature calculation in different cross‐sections of structural hot‐rolled steel profiles (IPE, HEM, L, and UAP) using the lumped capacitance method and the simplified equation from Eurocode 3. The basis of the lumped...
Analytical and numerical methodologies to study four different hot-rolled steel...
Oliveira, Pedro N.; Fonseca, E.M.M.; Campilho, Raul D.S.G.; Piloto, P.A.G.The main goal of this paper is to calculate the temperature distribution in four different hot-rolled steel profiles (IPE, HEM, L and UAP), during a thermal and transient process due an accidental fire situation. This work presents the lumped capacitance method, according to the section factors effect, and compares all results with the finite element method, using Ansys® numerical program. The basis of the lump...
Load bearing capacity of fire rated light timber frame walls
Piloto, P.A.G.; Fonseca, E.M.M.Light timer frame (LTF) walls are made of solid timber elements (studs and tracks) and are usually protected by fire insulation materials (gypsum). This investigation finds the residual load bearing capacity of LTF walls after certain fire rating periods (30, 60, 90 and 120). One LTF structure with 3 studs will be analysed with two different protection levels (one and two gypsum layers). The computational model...
The heat transfer modelling for bone metastatic lesion minimization using two d...
Oliveira, Vânia C.; Fonseca, E.M.M.; Belinha, Jorge; Rua, Cláudia C.; Piloto, P.A.G.; Jorge, RenatoBone tumors grow when cells divide without any control, forming a tissue mass. Bone tumors could be benign or malignant, and primary or metastatic due to systemic cancer cells dissemination. They destroy bone and lead to pathological fractures. The main objective of this work is to study the thermal effect induced by the bone cement polymerization, in the bone metastatic tumor minimization. To assess the clinic...
Effect of two different bone cements in thermal necrosis when associated to tit...
Rua, Cláudia C.; Belinha, Jorge; Piloto, P.A.G.; Jorge, R.M. Natal; Oliveira, Vânia C.; Fonseca, E.M.M.The main objective of the paper is to study the thermal effect induced by different bone cements associated with intramedullary nails, titanium and carbon, in bone metastases treatment. The thermal necrosis effect of each cement polymerisation was verified to understand the role of such procedures. Numerical models with nailing systems, introduced in a cortical and spongy bone metastasis, were developed aiming ...
Numerical thermal study in bone tumor lesion
Rua, Cláudia C.; Fonseca, E.M.M.; Piloto, P.A.G.; Oliveira, Vânia C.; Belinha, Jorge; Jorge, R. Natal; Vasconcelos, JoséWith the evolution of science and new diagnostic technologies, it was possible to observe a continuous improvement in the treatments in general and in the aid of the patients' quality of life. Malignant tumors can be primary or secondary (metastases), with abnormal growth of cells able to invade other types of tissues and organs through systemic dissemination. Sarcomas are rare primary malignancies formed from ...
Load-carrying capacity of hybrid steel-wood-steel dowel connections in double-s...
Fonseca, E.M.M.; Silva, Vânia; Piloto, P.A.G.The main objective of this work is to present a methodology to design (S-W-S) Steel-Wood- Steel connections in double shear, with internal dowel steel fasteners, in fire conditions. Analytical methodologies according Eurocodes were used to determine the load-carrying capacity of the connections. To analyse the load-carrying capacity, different wood densities and steel dowels diameters will be investigated. The ...
Timber framed walls lined with gypsum plates under fire
Piloto, P.A.G.; Fonseca, E.M.M.Building regulations require fire rating for partition walls under standard fire exposure. New eco building solutions are becoming popular and, in particular, the light timber framed walls. The fire rating of this building element depends on fire testing. Finite element approximation can be used, when models are validated from previous experimental tests. This investigation presents the validation model from a ...
Estudo térmico numérico em sarcomas ósseos
Rua, Cláudia C.; Oliveira, Vânia C.C.; Piloto, P.A.G.; Fonseca, E.M.M.; Belinha, Jorge; Jorge, Renato N.; Vasconcelos, José C.Com a evolução da ciência e das novas tecnologias de diagnóstico, foi possível observar uma melhoria contínua nos tratamentos em geral e no auxílio da qualidade de vida dos doentes. Os tumores podem ser benignos, podendo verificar-se um crescimento anormal de células sem capacidade de invadir outros tipos de tecidos e órgãos (metástase) ou malignos, em que as células crescem mais rápido e invadem outros tecidos...