This paper investigates the experimental response of composite reinforced concrete with GFRP and steel I-sections under limited cycles repeated load. The practical work included testing four beams. A reference beam, two beams pultruded I-sections, a beam I-beam were subjected to loading. loading test started by gradually up maximum 75% ultimate static failure load for five unloading cycles. Aft...

the present study is the first to analyze the dynamic response of a poroelastic beam subjected to a moving force. moreover, the influences of attached mass-spring systems and non-ideal supports (with local movements in the supporting points or base due to the presence of factors such as gaps, unbalanced masses, and friction or seismic excitations) on the responses were investigated. non-ideal s...

The lifetime of a stored beam due to the Touschek effect is calculated for arbitrary ratios of beam height to beam width. A variation of the beam envelopes is taken into account, i. e. the derivatives of the horizontal and vertical amplitude functions and dispersions are included. The calculation is done for arbitrary energies in the rest frame of the colliding particles.

The beam-beam performance of PEP-II has been monitored by parasitic measurements recorded during routine physics running, and by a few dedicated accelerator physics experiments. These measurements indicate that in some cases, the beam-beam interaction and the electron-cloud-induced blowup of the low-energy positron beam are somehow coupled and enhance each other. Tailoring the bunch pattern to ...