Optimal shapes are found for reduced beam section of a cantilever H-beam subjected to forced cyclic displacement at the free end. The beam is discretized to finite elements, and a commercial software package called ABAQUS is used for elastoplastic analysis. The numerical results are first compared with experimental results to verify the accuracy. The objective function to be maximized is the di...

The behaviour of seismically damaged steel joints with reduced beam section (RBS) at elevated temperatures has not been widely investigated yet. Therefore, the study summarized in this article aimed to (i) analyse response RBS high and (ii) investigate influence plastic damage, due cyclic loading, on fire performance joints. A set rib stiffeners both lower upper flanges was designed according E...

in this paper, eringen’s nonlocal elasticity and timoshenko beam theories are implemented to analyze the bending vibration for non-uniform nano-beams.  the governing equations and the boundary conditions are derived using hamilton’s principle. a generalized differential quadrature method (gdqm) is utilized for solving the governing equations of non-uniform timoshenko nano-beam for pinned-pinned...

Connections with Reduced Beam Section (RBS) have been investigated in the last 20 years both from an analytical point of view and from an experimental point of view. Several experimental tests demonstrated that RBS connections designed according to themost modern seismic codes are able to obtain the desired goal: the protection of the connection due to the yielding of the adjacent RBS. But in a...

Softening of beams near the moment connection can be regarded as one most convenient methods for retrofitting non-seismically designed buildings. This done by drilling beam web (aka RWS–Reduced Web Section) or cutting flanges RBS–Reduced Beam Section). Thus, becoming a cost-effective option and erection new buildings, while optimising use steel; making this high environmental impactful material...