No abstract

No abstract

An experimental and numerical investigation carried out on RC wide beam-column joints when subjected to seismic loads is reported within this paper. The experimental study was conducted by subjecting three full-scale wide exterior beam-column specimens to simulated seismic loads at the Nanyang Technological University of Singapore.Simulations of earthquake loadings were applied on to the specimens via quasistatic load reversals. Seismic performance analysis of the joints were based on the results obtained from the experiment in terms of their general behavior, hysteresis response, and the strain profiles of the longitudinal reinforcement within the specimens. These experimental results were then used to validate a three-dimensional (3D) nonlinear finite-element (FE) model. The behavior of the joints under the influence of critical influencing factors like column axial load, transverse beam, and beam bar anchorage ratio were also analyzed through the parametric studies carried out.

The deflection and time response of shape memory alloy laminated composite plate are studied using first order shear deformation theory. The composite plate consists of a thin layer of shape memory alloy bonded to an elastomer layer. The governing equations of the plate are developed using the energy balance equations and a two-dimensional model of the shape memory alloy layer. The finite element is modeled with the first order shear deformation theory and equivalent single layer assumptions. The model is validated by comparing the results of the displacements and time responses with the literature. As a specific example, a cantilever composite plate is used for parametric studies. The effect of material properties, electric input power, thickness, thermal conductivity and heat sink strength on deflection and time response is also investigated.

This paper presents a finite-element model for the free vibration analysis of a shape memory alloy (SMA) surface laminated composite cantilever plate. The proposed device is considered to undergo small displacements and small strains. The governing equations are developed utilizing the first-order shear deformation theory, energy balance equations and two-dimensional model of the SMA layer. The finite element is modelled using first-order shear deformation theory and equivalent single-layer assumptions. The plate is considered with clamped-free boundary conditions, and the SMA layer is at the top of the composite plate. Parametric studies are conducted to study the effect on free vibration of varying the SMA volume fraction, the temperature of the SMA, and the thickness, width and stiffness of the composite cantilever plate.