Scouring around the bridge pier is a natural and complex phenomenon that results in failure. Failure of bridges have potential devastation public safety economic loss, which lead to political consequences environmental impacts. Therefore, it essential countermeasure scour pier. This paper studies effects four different airfoil-shaped collars (i.e., bc1 = 1.5b, bc2 2.0b, bc3 2.5b bc4 3.0b, where...

This research explores how a circular collar with tilt angle (counterclockwise around the direction of channel cross-section) could affect local scour depth single cylindrical pier in clear-water based on Large Eddy Simulation (LES) six cases. The results show that horizontal is best for reducing depth. With increases angle, effect decreases gradually and even counterproductive at equilibrium. ...

The AASHTO code of practice for design of bridges shows that the ductility level for foundation is given equal to one. Bridges are classified in three classes. For class of essential and normal bridges a question for not to use ductility level due to the importance of bridges’ costs is become an important item in different countries particularly in Middle east. This paper aimed to study on pe...

We explore the utility and execution of recursive queries as an interface for querying distributed network graph structures. To illustrate the power of recursive queries, we give several examples of computing structural properties of a P2P network such as reachability and resilience. To demonstrate the feasibility of our proposal, we sketch execution strategies for these queries using PIER, a P...

Alessandro Nanni Costa, J. M. Simón i Castellvì, Antonio G. Spagnolo, Nunziata Comoretto, Jean Laffitte, Håkan Gäbel, Francis L. Delmonico, Ferdinand Muehlbacher, Walter Schaupp, Alexandra K. Glazier, Valter D. Garcia, Mario Abbud-Filho, Jose O. Medina-Pestana, Mariangela Gritta Grainer, Pier Paolo Donadio, Anna Guermani, Riccardo Bosco, Francesco Giordano, Blanca Martinez Lopez de Arroyabe, Ma...

Recently, a benchmark problem has been developed to study seismically excited highway bridges. In the second phase of the aforementioned study, the bridge is isolated both at the abutments and at the central pier location. The isolation, though effective in reducing the superstructure responses such as mid-span accelerations, results in increased mid-span and isolator displacements. The perform...

Martin Kunz, Pier-Stefano Corasaniti, David Parkinson, and Edmund J. Copeland Astronomy Centre, University of Sussex, Brighton, BN1 9QJ, United Kingdom Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QJ, United Kingdom ISCAP, Columbia University, Mailcode 5247, New York, New York 10027, USA Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, P...

Pier-Stefano Corasaniti, Dragan Huterer, and Alessandro Melchiorri LUTH, CNRS UMR 8102, Observatoire de Paris-Meudon, 5 Place Jules Janssen, 92195 Meudon Cedex, France Kavli Institute for Cosmological Physics and Astronomy and Astrophysics Department, University of Chicago, Chicago, Illinois 60637, USA Dipartimento di Fisica e Sezione INFN, Universita’ degli Studi di Roma ‘‘La Sapienza’’, Ple A...