Abstract This paper investigates the lateral‐torsional buckling of built‐up cold‐formed steel beams featuring two or three component C‐ sigma‐sections arranged to have a closed loop. Several thicknesses each cross‐section with nominal yield stress values 450 MPa and 550 were tested obtain lateral strength data for range slenderness values. Complementary reference tests conducted on same section...

This paper presents the use of a finite element method (FEM) to analyze shear lag effect due flexure beams with an arbitrary cross-section and homogeneous elastic material. Beams are constrained by most common types supports, such as fixed, pinned, roller. The transverse, concentrated, or distributed loads act on through center cross-section. presented FEM transforms 3D analysis phenomenon into...

The photogrammetric approach was proposed in this study to evaluate torsional behaviour of glulam timber beams during the torsion test. main objectives were investigate applicability and monitor more details angles twist beams. Experiments conducted twists on long short sides cross section measured using inclinometer sensors, which used validate accuracy. test results showed that optical system...

Nowadays in the construction of modem buildings, it is necessary to accommodate pipes and ducts services, such as air conditioning, water supply, sewerage, electricity, computer networks, telephone networks. Cellular members – steel I‐ shaped structural elements with circular web openings at regular intervals have been used beams for more than 35 years now. Although past already a large deal re...

We propose the laser cooling of bunched relativistic beams of Alkaline-like and especially all Lithium-like ions in SIS 100/300, where due to the huge Doppler-shifts (γmax=35; Bρ=300Tm) optical ground state transitions can be excited employing existing laser technology. To avoid optical pumping between hyperfine levels e-e nuclei are preferred. The principle aim is the strong improvement of the...

Abstract The structural behaviour of hybrid reinforced concrete beams trapezoidal section was investigated in this work. main aim study to investigate the interaction effect compressive strength–section geometry variations on beam strength characteristics. experimental programme included fourteen simply supported deep being prepared and examined under a four-point load setting protocol. All spe...