The preservation of beam quality in a plasma wakefield accelerator driven by ultrahigh intensity and ultralow emittance beams, characteristic of future particle colliders, is a challenge. The electric field of these beams leads to plasma ions motion, resulting in a nonlinear focusing force and emittance growth of the beam. We propose to use an adiabatic matching section consisting of a short pl...

The behaviour and design of high strength steel (HSS) beams are addressed in the present study. Six in-plane three-point bending tests on three different welded I-sections ? two homogeneous S690 one hybrid I-section with flanges an S355 web, were first conducted. beam carried out major axis a bespoke restraint system was designed employed test programme to prevent lateral-torsional buckling. Fo...

the effect of steel plate thickness on the repair effectiveness of rc beam is presented in this paper. a total of four beams were tested, one beam repaired by cfrp with a thickness of 1.2 mm and used as a control beam, and three beams repaired by a steel plate. steel plates with a thickness of 2 mm, 3 mm, and 4 mm were used in repairing the beams. the maximum load-carrying capacity, deflection ...

The use of cold-formed steel (CFS) back-to-back channels as floor joists is increasing steadily, and such beams often include un-stiffened holes for installation services, which reduces their flexural strength due to the reduced web area. A new generation CFS with edge-stiffened has been widely used. However, no research undertaken understand effects composite actions on moment capacity built-u...

ao"length of opening dh, dl"distance from top of steel section to centroid of concrete force at high and low moment ends of the opening, respectively dr"distance from outside edge of flange to centroid of reinforcement *b"maximum bending deflection for unperforated beam *m,b"maximum bending deflection for a member with an opening Fy"yield stress of steel FM y"reduced axial strength of steel in ...

Physics with neutrino beams has played a crucial role in establishing the standard model and its structure, specifically in leading to the discovery of weak neutral currents and of their properties. Currently, while the physics of neutrinos gives us the first evidence of physics beyond the standard model, the use of neutrinos as probes appears to be the only way of accessing subtle details of t...

In the design and assessment of precast concrete beams with a slab cast on top, namely composite beams, engineers still face in practice unsolved shear-related issues, such as contribution to shear strength slab, be considered formulations or influence interface between concretes behaviour. present research, 69 tests were performed monolithic rectangular T-shaped cross-section, without transver...

This research is carried out to study the effect of external post-tensioning technique on flexural capacity simply supported composite castellated beam experimentally. In this research, seven beams having same dimensions and material properties were cast tested up failure by applied two concentrated loads at 700 mm from each end. Two strands 12.7 diameter fixed side web strengthening located de...