Uma estrutura plana simétrica é constituída por oito treliças idênticas encastradas em apoios articulados. The structure is loaded by a concentrated force and alternatively by imposed nodal deformation over the critical limit point when the snap-through occurs. Imposed nodal deformation is used in RFEM 5 and RSTAB 8 to obtain the full equilibrium path of the snap-through. The self-weight is neglected in this example. Determine the relationship between the actual loading force and the deflection, considering large deformation analysis. Evaluate the load factor at the given deflections.
Uma estrutura é constituída por quatro treliças encastradas em apoios articulados. The structure is loaded by a concentrated force and alternatively by imposed nodal deformation over the critical limit point, when snap-through occurs. Imposed nodal deformation is used in RFEM 5 and RSTAB 8 to obtain the full equilibrium path of the snap-through. The self-weight is neglected in this example. Determine the relationship between the actual loading force and the deflection, considering large deformation analysis. Evaluate the load factor at given deflections.
A column is composed of a concrete section (rectangle 100/200) and a steel section (profile I 200). Está sujeito a uma força de compressão. Determine the critical load and corresponding load factor. The theoretical solution is based on the buckling of a simple beam. In this case, two regions have to be taken into account due to different moments of inertia and material properties.
A viga de aço de secção quadrada está sujeita a uma força normal e a uma carga distribuída. The image shows the calculation of the maximum bending deflection and critical load factor according to the second-order analysis.
A viga de aço carregada axialmente com uma secção quadrada está apoiada sobre uma articulação numa das extremidades e sobre uma mola na outra extremidade. Two cases with different spring stiffnesses are considered. The verification example solves the calculation of the load factors of the beam in the image using the linear stability analysis.