Initiation of motion of coarse solitary particles on rough channel beds

Download

index.pdf

Date

2009

Author

Küçüktepe, Ömer İlker

Metadata

Show full item record

Item Usage Stats

119
views

56
downloads

In this study the incipient motion of coarse solitary particles on channel beds having different roughness heights was experimentally investigated. The experiments were conducted in a tilting flume of a rectangular cross-section having a working length of 12 m and a rough bed composed of at least 2 layers of coarse gravel of almost constant size. The roughness material of the channel bed was changed three times. The slope of the channel bed and the discharge are two main parameters that determine the initiation of motion of a given particle. The artificial particles tested in the experiments were obtained by mixing cement and iron dust at certain ratios. Dimensionless hydraulic parameters determined from theoretical analysis were related to each other. Flow depths, velocity profiles were measured and flow conditions that represent the critical conditions of initiation of motion were expressed in terms of critical velocities and shear velocities. The results were compared with the previous studies’ results.

Subject Keywords

Civil engineering.

URI

http://etd.lib.metu.edu.tr/upload/3/12611324/index.pdf
https://hdl.handle.net/11511/19190

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Incipient motion of coarse solitary particles Gülcü, Besim; Göğüş, Mustafa; Department of Civil Engineering (2009) In this study the incipient motion of coarse solitary particles having different specific weights and shapes was investigated. A tilting flume of rectangular cross-section having a net working length of 12 m was used through the experiments. The slope of the channel and the discharge in the channel are the two basic variable parameters that determine the initiation of motion. Particles made of cement and mixture of cement and iron dust in certain ratios were used in the experiments with an obstructing eleme...
Vertical ground motion influence on seismically isolated & unisolated bridges Rehanoğulları, Naim Eser; Akyüz, Uğurhan; Department of Civil Engineering (2010) In this study influences of vertical ground motion on seismically isolated bridges were investigated for seven different earthquake data. One assessment of bearing effect involves the calculation of vertical earthquake load on the seismically isolated bridges. This paper investigates the influence of vertical earthquake excitation on the response of briefly steel girder composite bridges (SCB) with and without seismic isolation through specifically selected earthquakes. In detail, the bridge is composed of ...
Effect of shear walls on the behavior of reinforced concrete buildings under earthquake loading Çömlekoğlu, Hakkı Gürhan; Burak Bakır, Burcu; Department of Civil Engineering (2009) An analytical study was performed to evaluate the effect of shear wall ratio on the dynamic behavior of mid-rise reinforced concrete structures. The primary aim of this study is to examine the influence of shear wall area to floor area ratio on the dynamic performance of a building. Besides, the effect of shear wall configuration and area of existing columns on the seismic performance of the buildings were also investigated. For this purpose, twenty four mid-rise building models that have five and eight sto...
A study on the effect of pipe - soil relative stiffness on the behaviour of buried flexible pipes Bircan, Mehmet; Özkan, M. Yener; Department of Civil Engineering (2010) In this study, the effect of pipe-soil relative stiffness on the behaviour of buried flexible pipes was investigated considering the pipe size, material type, stiffness, pipe-soil and natural soil-backfill interfaces and geometry of the trench using the finite element method. For this purpose, a parametric study was conducted to examine the effect of different variables on the resulting earth loads and deformations imposed on the buried pipes. Various types of trench pipe-soil cases were analysed for a cert...
Development and analytical verification of an inelastic reinforced concrete joint model Unal, Mehmet; Burak Bakır, Burcu (Elsevier BV, 2013-07-01) Previous experimental research indicated that beam-to-column connections of reinforced concrete (RC) moment resisting frame structures experience considerable deformations under earthquake loading and these deformations have a major contribution to the story drift of the building. In current analysis and design applications, however, the connection regions are generally modeled as rigid zones and the inelastic behavior of the joint is not considered. This assumption gives rise to an underestimation of the s...

Citation Formats

Ö. İ. Küçüktepe, “Initiation of motion of coarse solitary particles on rough channel beds,” M.S. - Master of Science, Middle East Technical University, 2009.