نتایج جستجو برای: pier
تعداد نتایج: 1668 فیلتر نتایج به سال:
Submerged vanes are low aspect ratio flow-training structures mounted vertically on the river bed at an angle to the prevailing flow. The aim of application of vane is to generate a secondary circulation in the main flow, designed to modify the near-bed flow pattern and thus redistribute flow and sediment transport within the channel cross section. Collar is a flat sheet with low thickness fixe...
Flow pattern around the bridge piers includes water surface profile, velocity profile, shear velocity, shear stress distribution, etc. In this research, the effects of the base shape along with scale effects on the flow pattern around the rectangular bridge piers were numerically calculated through "Fluent Software", using Horizontal Velocity Distribution (Vx) and Vertical Velocity Distribution...
The use of slot through a pier is a new method proposed to control local scour at bridge piers. In this study, control of local scour at bridge pier is studied using 20 pier models under clear water conditions. The models consist of one circular pier without slot, three round-nosed piers without slot, and 16 piers with slot. Two slot lengths were chosen (yl=b and yl=2b, where y1 is the length o...
Pelicci, Leonardo Flenghi, Massimo F. Martelli and Antonella Santucci Roberto Giardini, Antonella Aiello, Hans-Dieter Foss, Iguacyra Araujo, Marco Fizzotti, Pier-Giuseppe Wolf-Peeters, Gregor Verhoef, Fabio Menestrina, Giuseppe Todeschini, Marco Paulli, Mario Lazzarino, Brunangelo Falini, Stefano Pileri, Pier Luigi Zinzani, Antonino Carbone, Vittorina Zagonel, Chris Lymphoma: Clinico-Pathologic...
Massimo Cugno1, Mara Cabibbe1, Monica Galli 2, Pier Luigi Meroni3, Sonia Caccia4, Rosaria Russo4, Bianca Bottasso1, Pier Mannuccio Mannucci.1 1Department of Internal Medicine and Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, IRCCS Maggiore Hospital and University of Milan, Milan, Italy. 2Department of Hematology, Ospedali Riuniti, Bergamo, Italy. 3Department of Internal Medicine, Univ...
A nonlinear approach for the life-cycle cost (LCC) analysis is proposed. Computational procedure for the analysis of LCC for seismically isolated bridges in a region of low to moderate seismicity is established. To compute the failure probability of critical structural components, most probable failure modes for the structure-isolator system are defined as unseating failure of a superstructure,...
A set of input specifications is designed to enable engineers and scientists, who may not be computer experts, to describe the finite element analysis (FEA) procedures for a new application. The input directs PIER, a code derivation/generation system being developed in Common Lisp, to produce either sequential or parallel FEA codes. The PIER input employs common terminology and notations as use...
Bridges are built in a variety of locations, many of which are susceptible to multiple extreme hazards (earthquakes, vehicle collisions, tsunamis or storm surges, and blasts are considered in this research since they are present as a minimum for some locations). This underscores the need to develop an innovative design concept for bridges from a multi-hazard perspective in which all hazards and...
In the present work, the efficiency of single and double collar in reducing scour rate and depth around cylindrical bridge piers was studied experimentally. In order to reduce the strength of wake vortices, different numbers of bars were also installed at the downstream face of the pier in combination with a single collar. The best result was achieved for double collar when the collars were ins...
An experimental study has been conducted on the effectiveness of two types of flow-altering countermeasures placed around a cylindrical pier under clear water condition, which include sacrificial piles and submerged vanes. Their arrangements follow the optimal configurations recommended in the published articles with some modification. The temporal evolution of maximum scour depth and its equil...
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