نتایج جستجو برای: post tensioning

تعداد نتایج: 404824  

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 1992

2007
L. V. Taveira A. A. Sagüés

The feasibility and sensitivity of electrochemical noise (EN), electrochemical impedance spectroscopy (EIS), and linear polarization resistance (LPR) for detection of corrosion in post-tensioning (PT) components was investigated. The use of the electrical resistance (ER) technique, as well EIS and LPR, to detect air space corrosion at the grout voids was also explored. The results showed that h...

2012
David A. Roke R. Hasan

Conventional concentrically-braced frame (CBF) systems have limited drift capacity before brace buckling and related damage leads to deterioration in strength and stiffness. Self-centering concentrically-braced frame (SC-CBF) systems have been developed to increase drift capacity prior to initiation of damage and minimize residual drift. SC-CBFs differ from conventional CBFs in that the SC-CBF ...

2013
Brian J. Smith Yahya C. Kurama

This paper presents an analytical investigation on the peak lateral displacement demands of “hybrid” precast concrete panelized shear wall structures under seismic loading. The hybrid wall structure investigated uses a combination of mild [i.e., Grade 400 (U.S. Grade 60)] steel bars and highstrength unbonded post-tensioning (PT) strands for lateral resistance across horizontal joints. The analy...

2003
M. L. Lau S. H. Rizkalla K. A Soudki

Precast load-bearing shear wall panels are used extensively for high-rise construction because of the ease and speed of assembly, and the high quality of the precast panels. The connections between panels are extremely important since they affect both the speed of erection '~md the overall integrity of the structure. This paper presents the results of a four-year research program conducted to i...

2006
Gregory McLaskey

Proper identification of the modes of vibration of a structure is crucial in order to avoid the condition of resonance under dynamic loading conditions. A combination of numerical simulation, physical experimentation, and waveform analysis was employed in order to obtain a dynamic evaluation of the reaction wall for the Network for Earthquake Engineering Simulation NEES large scale testing labo...

Journal: :Orthopedics 2012
Daniel C Acevedo Brian Lee Raffy Mirzayan

Ulnar collateral ligament (UCL) reconstruction of the elbow has been shown to restore function in overhead athletes with valgus instability. Since the initial description of using bone tunnels for reconstruction, many modifications to the surgical technique have been introduced, including the modified Jobe technique, the docking technique, fixation with interference screws, and button fixation....

2015
Panayiotis C Roussis Antonios E Giannakopoulos Haralambia P Charalambous Demetra C Demetriou Georgios P Georghiou

BACKGROUND Routine vascular surgery operations involve stitching of disconnected human arteries with themselves or with artificial grafts (arterial anastomosis). This study aims to extend current knowledge and provide better-substantiated understanding of the mechanics of end-to-end anastomosis through the development of an analytical model governing the dynamic behavior of the anastomotic regi...

Journal: :Bulletin of the NYU hospital for joint diseases 2007
Biren V Chokshi Charbel Ishak Kazuho Iesaka Laith M Jazrawi Frederic J Kummer Jeffrey E Rosen

Sliding knots are commonly used in arthroscopic surgery and can be problematic in terms of strength and loop security. A new sliding knot for arthroscopic surgery, a modified racking hitch (MRH) knot, is described. The knot is essentially a modified cow's hitch knot that includes two self-locking loops. By tensioning the loop strands, a snug knot is created without backward sliding and provides...

2014
Cormac W. Joyce Kenneth M. Joyce Ann-Marie Kennedy Jack L. Kelly

SUMMARY Barbed suture technology is becoming increasingly popular in plastic surgery and is now being used in body contouring surgery and facial rejuvenation. We describe the novel application of a barbed suture as a running tie-over dressing for skin grafts. The barbs act as anchors in the skin, so constant tensioning of the suture is not required. The bidirectional nature of the suture preven...

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