Origami-inspired foldable structures have seen much recent interest for applications in which transportability or rapid construction are primary design drivers, for example emergency shelters and temporary staging structures. This paper proposes a new type of a structural module that can be manually folded from flat steel sheet into a novel self-braced triangular structural section. Simple geom...

The topic of connections is often given only limited attention in structural analysis and design of buildings, despite the fact that they can play a critical role in the structure. It is customary practice in the U.S. for the structural engineer to design the structural members, but leave the connection details to the steel fabricator. While this practice is more efficient and pragmatic in some...

A variational model describing the nonlinear mode interaction in thin-walled box-section struts under pure axial compression made from a material obeying Ramberg–Osgood law is presented. The formulation combines continuous displacement functions and generalized coordinates, leading to derivation of system differential integral equations that describe static equilibrium response strut. Solving u...

The improvement and the capacity assessment of existing buildings has become the main topic of the last years so that different studies can be found devoted to damaged structures or structures not having a capacity compatible with the safety levels of the actual codes. Reinforced concrete framed structure buildings represent a conspicuous rate of the existing constructions so many efforts are a...

Over the last decade, use of cold-formed steel (CFS) sections has increased significantly increasing in lightweight buildings and many other industrial constructions worldwide. The present research paper aims to investigate distributed load capacity CFS buildings. Three built-up were investigated for column three girder a frame building study case. Channels, channels with lip, sigma section, ho...

This paper outlines a novel approximate solution for determining the pressure drop of laminar, single-phase flow in slowly-varying microchannels of arbitrary cross-section. The proposed analysis is general and applicable to symmetric and asymmetric microchannel cross-sections, as examples compact relationships are reported for elliptical and rectangular shapes for three common wall profiles of ...

When compared to the over-simplified classical skin-effect model, the accurate classical relaxation-effect modelling approach for THz structures at room temperature can be mathematically cumbersome and not insightful. This paper briefly introduces various interrelated electrical engineering concepts as tools for characterizing the intrinsic frequency dispersive nature of normal metals at room t...

Industrialization of construction makes building operation more environmental friendly and sustainable. This change is necessary as it an industry that demands large consumption water energy, well being responsible for the disposal a high volume waste. However, transformation sector big challenge worldwide. It also known largest proportion material used in multistory buildings, thus its carbon ...

polyvinylidene fluoride/polyvinylpyrrolidone (pvdf/pvp) hollow fiber membranes were fabricated by dry-jet wet-spinning process. the correlated effects of the air gap length and pvp concentration ((1) the air gap length effect at the low and high pvp concentration in the dope solutions, as well as (2) the effect of the pvp concentration at the same air gap length) on the cross-section structure ...

This communication presents a compact leaky-wave antenna providing circular polarization from dual-mode hollow waveguide (WG). The monolithic structure is based on rectangular metallic guide that perforated with crossed slots. fed by standard WR42 port, which connected to the leaky WG transition allows for excitation. axial ratio (AR) determined size of section and dimensions crosses. In order ...