Doubly-curved ribbed concrete shells are a materially efficient means of spanning large areas such as roofs and floors. However, the fabrication structures poses challenges in terms formwork manufacturing well material deposition. This has led to their decline compared more prismatic shapes flat slabs which can be manufactured economically. paper presents novel process called Automated Robotic ...

The system of coupled discrete equations describing a two-component superlattice with interlaced linear and nonlinear constituents is studied as a basis for investigating binary waveguide arrays, such as ribbed AlGaAs structures, among others. Compared to the single nonlinear lattice, the interlaced system exhibits an extra band-gap controlled by the, suitably chosen by design, relative detunin...

Grain-scale surface roughening due to plastic straining in polycrystalline aluminum is studied with the aid of a three-dimensional finite-element crystal-plasticity model. An improved understanding of the origin of surface roughening profiles in plastically strained aluminum is sought. Large-scale, Direct Numerical Simulation enables the computation of full-field solutions and the explicit cons...

The concrete used in floor slabs accounts for large greenhouse gas emissions building construction. Solid slabs, often today, consume much more than ribbed built by pioneer structural engineers like Hennebique, Arcangeli and Nervi. first part of this paper analyses the evolution slab systems over last century their carbon footprint, highlighting that have been abandoned mainly sake construction...