نتایج جستجو برای: circular pier

تعداد نتایج: 69296  

ژورنال: علوم آب و خاک 2011
علیرضا مسجدی, , مهدی غلامزاده محمودی, ,

Every year river flooding causes serious damage to the bridges at the time needed most. One of the most effective factors causing bridge failure is scouring around the piers in a river bend. One of the methods to decrease scouring around the bridge piers is fitting them with a coller on the piers. The collars protect the river bed against vortex flow in the vicinity of the pier base. An experim...

Journal: :Journal of the Korean Society of Hazard Mitigation 2021

2009
Shuichi Fujikura Diego Lopez-Garcia

This paper presents the development and experimental validation of a multizard bridge pier concept, i.e., a bridge pier system capable of providing an adequate level of protection against collapse under seismic and blast loading but not acting simultaneously . A multicolumn pier-bent with concrete-filled steel tube CFST columns is the proposed concept, and the adequacy of this system is experim...

Journal: :civil engineering infrastructures journal 0
mojtaba karimaee tabarestani ph.d. of water engineering, civil and environmental department, amirkabir university of technology, p.o. box 15915, tehran, iran amir reza zarrati professor, civil and environmental department, amirkabir university of technology, p.o. box 15915, tehran, iran

an attempt was made to develop a method for sizing stable riprap around bridge piers based on a huge amount of experimental data, which is available in the literature. all available experimental data for circular as well as round-nose-and-tail rectangular piers were collected. the data for rectangular piers, with different aspect ratios, aligned with the flow or skewed at different angles to th...

2008
Richelle Gallardo Zafra Kazuhiko Kawashima

Experimental studies were conducted by some researchers to investigate the cyclic performance of CFSretrofitted columns; however there is a need to develop analytical methods which can simulate its hysteretic response. This study presents an analysis of the hysteretic behavior of CFS-retrofitted reinforced concrete circular columns. Fiber element analysis was conducted based on cyclic constitut...

Journal: :Teknik Dergi 2021

In this study, the scour depth and dimensions of hole around different shaped piers for cases hydrographs succeeding steady flow were studied experimentally. The experiments carried out by using circular, square, rectangular, lenticular rectangular with trapezoidal nose to compare various geometries at same conditions. Numerous conducted in a flume (18.6 m long, 0.80 wide 0.75 deep) triangular ...

2007
Lukas Renggli

Pier is the second generation of an industrial strength content management and application framework. Pier is written with objects from top to bottom and it is easily customized to accommodate new requirements. Pier is based on Magritte, a powerful meta-description framework. Pier has proven to be very powerful in the combination with Seaside, to enable easy composition and configuration of int...

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