515 research outputs found
Bolted and hybrid beam-column joints between I-shaped FRP profiles Chapter Bolted and hybrid beam-column joints between I-shaped FRP profiles
Presented are test results from five full-scale pultruded FRP beam-to-column joints subjected to cyclic load-ing. The parameters include cleat position, connection method and cleat material. The joints’ behaviour is assessed through hysteresis moment rotation loops, accumulated dissipated energy and failure patterns. The hybrid joints with steel cleats showed the best overall cyclic performance with accumulated dissipated ener-gy 75% higher than the bolted joint. The bolted joint with FRP cleats exhibited the lowest dissipated energy, four times lower than the joint with steel cleats. The cyclic performance of web and flange cleated joint was same as flange cleated joint. Three failure patterns were noticed, namely shear-out failure of the beam’s bolted region (bolted joint with steel cleats), adhesive debonding followed by shear-out failure (hybrid joint with steel cleats) and delamination cracking (bolted joint with FRP cleats)
Cyclic Response of Bolted and Hybrid Pultruded FRP Beam-Column Joints between I-Shaped Sections
This paper presents cyclic behaviour of bolted and hybrid–combined bolted and bonded fibre re-inforced polymer (FRP) beam-to-column joints between I-shaped members using steel and FRP cleats. Five full-scale cyclic tests are carried out to study moment-rotation behaviour, cyclic re-sponse, and failure patterns. The test parameters include position of cleat (flange or combined web and flange), fastening method (bolting or hybrid–combining bolting and bonding) and cleat ma-terial (steel or FRP). First two tests had bolted and hybrid joints with steel flange and web double angles. Next two tests had the same joint detailing but with no web cleats. Last test used bolted joint only with FRP web and flange cleats. Three failure modes were observed: shear-out failure of the beam’s bolted zone, adhesive debonding with shear-out failure and delamination cracking. Cyclic performance of the joints was assessed by hysteresis moment-rotation curves and accumulated dissipated energy. Hybrid joints showed the best overall cyclic performance with accumulated dissipated energy about 75% higher than the bolted joints. Bolted joints with FRP cleats exhibited the worst cyclic performance. Flange cleated joints showed similar performance to web and flange cleated joints
Distinction inside L-packets of SL(n)
If is a quadratic extension -adic fields, we first prove that the
-distinguished representations inside a distinguished unitary
L-packet of are precisely those admitting a degenerate
Whittaker model with respect to a degenerate character of . Then we
establish a global analogue of this result. For this, let be a quadratic
extension of number fields and let be an
-distinguished square integrable automorphic
representation of . Let be the unique
pair associated to , where is a cuspidal representation of
with . Using an unfolding argument, we
prove that an element of the L-packet of is distinguished with respect to
if and only if it has a degenerate Whittaker
model for a degenerate character of type of
which is trivial on , where is
the group of unipotent upper triangular matrices of . As a first
application, under the assumptions that splits at infinity and is
odd, we establish a local-global principle for
-distinction inside the L-packet of . As a
second application we construct examples of distinguished cuspidal automorphic
representations of such that the period
integral vanishes on some canonical copy of , and of everywhere locally
distinguished representations of such that their
L-packets do not contain any distinguished representation.Comment: Merged with withdrawn arXiv:1906.11560. We simplified some arguments
and removed an unnecessary Grunwald-Wang assumptio
IbM PENYULUHAN NARKOBA dan PENTINGNYA EDUKASI BAHAYA NARKOBA BAGI KELOMPOK MAJELIS TAKLIM dan PEMUDA di DESA MASSAMATURU TAKALAR
IbM PENYULUHAN NARKOBA dan PENTINGNYA EDUKASI BAHAYA NARKOBABAGI KELOMPOK MAJELIS TAKLIM dan PEMUDAdi DESA MASSAMATURU TAKALA
Recommended from our members
Grindr Users Take More Risks, but Are More Open to Human Immunodeficiency Virus (HIV) Pre-exposure Prophylaxis: Could This Dating App Provide a Platform for HIV Prevention Outreach?
BackgroundTechnology has changed the way that men who have sex with men (MSM) seek sex. More than 60% of MSM in the United States use the internet and/or smartphone-based geospatial networking apps to find sex partners. We correlated use of the most popular app (Grindr) with sexual risk and prevention behavior among MSM.MethodsA nested cohort study was conducted between September 2018 and June 2019 among MSM receiving community-based human immunodeficiency virus (HIV) and sexually transmitted infection (STI) screening in central San Diego. During the testing encounter, participants were surveyed for demographics, substance use, risk behavior (previous 3 months), HIV pre-exposure prophylaxis (PrEP) use, and Grindr usage. Participants who tested negative for HIV and who were not on PrEP were offered immediate PrEP.ResultsThe study included 1256 MSM, 1090 of whom (86.8%) were not taking PrEP. Overall, 580 of 1256 (46%) participants indicated that they used Grindr in the previous 7 days. Grindr users reported significantly higher risk behavior (greater number of male partners and condomless sex) and were more likely to test positive for chlamydia or gonorrhea (8.6% vs 4.7% of nonusers; P = .005). Grindr users were also more likely to be on PrEP (18.7% vs 8.7% of nonusers; P < .001) and had fewer newly diagnosed HIV infections (9 vs 26 among nonusers; P = .014). Grindr users were also nearly twice as likely as nonusers to initiate PrEP (24.6% vs 14%; P < .001).ConclusionsGiven the higher risk behavior and greater acceptance of PrEP among MSM who used Grindr, Grindr may provide a useful platform to promote HIV and STI testing and increase PrEP uptake
- …