Physics & Mathematics
http://repository.embuni.ac.ke/handle/123456789/870
2024-03-29T08:02:06ZEffect of Beam Length and Braced Length on Moment-Rotation Behavior of Castellated Beams
http://repository.embuni.ac.ke/handle/123456789/1855
Effect of Beam Length and Braced Length on Moment-Rotation Behavior of Castellated Beams
Gerami, Mohsen; Saberi, Hamid; Saberi, Vahid; Firouzi, Ashkan
The presence of web openings in castellated beams introduces different modes of failure at the perforated sections such
as excessive stresses in tee-sections, excessive stresses in mid-depth of the web post, web-post buckling, developing
plastic Vierendeel mechanism. This paper presents nonlinear behavior of castellated beams under moment gradient
loading and investigates the effect of beam length and braced length on moment-rotation behavior and ductility of this
type of beams. Accuracy of finite element models of plain-webbed beams is evaluated comparing moment-rotation behavior
and failure mode of other researchers’ numerical models and cleared a satisfactory accuracy. Rotational capacity
of castellated beams, derived from numerical modeling, is compared with corresponding I-shaped plain-webbed steel
beams and it is cleared that for the short beams, web openings reduce energy absorbance and plastic moment capacity
of the beams more than long ones.
2013-09-01T00:00:00ZStudy on the Relationship between Aspects, Orientation,Type, and Unit Position toward to Indoor Air Quality in Flat
http://repository.embuni.ac.ke/handle/123456789/1667
Study on the Relationship between Aspects, Orientation,Type, and Unit Position toward to Indoor Air Quality in Flat
Tobing, Rumiati R.; Karyono, Tri Harso; Sabaruddin, Arief
Thermal factor is one of the main factors of the green building concept. The purpose of this research is to test building
performance through design aspect that influences thermal comfort, the design aspects include: orientation, building
type, and position of the flat. Method used in this research is covariance analysis, testing the influence of factor variable
toward respond variable (indoor temperature) with taking outdoor temperature as concomitant variable. The cases tested
on this research are Cigugur Tengah, Industri Dalam, and Sarijadi flats. Result of covariance analysis shows that the
building orientation factor variable is most influentially variable toward thermal comfort, compared with building type
factor variable; even the unit position factor variable has no significant influence toward thermal comfort.
2013-05-01T00:00:00ZSome New Results on Prime Graphs
http://repository.embuni.ac.ke/handle/123456789/1513
Some New Results on Prime Graphs
Vaidya, Samir K.; Prajapati, Udayan M.
We investigate prime labeling for some graphs resulted by identifying any two vertices of some graphs. We also introduce the concept of strongly prime graph and prove that the graphs Cn, Pn, and K1,n are strongly prime graphs. Moreover we prove that Wn is a strongly prime graph for every even integer n ≥ 4.
2012-07-01T00:00:00ZDecisive Parameters for Backwater Effects Caused by Floating Debris Jams
http://repository.embuni.ac.ke/handle/123456789/1511
Decisive Parameters for Backwater Effects Caused by Floating Debris Jams
Hartlieb, Arnd
The dimensional analysis of the backwater effect caused by debris jams results in the Froude number of the approach flow in the initial situation prior to debris jam formation and the debris density as decisive parameters. For the more precise detection of the influence of both parameters the results of different hydraulic model test series at the Laboratory of Hydraulic and Water Resources Engineering of the Technical University of Munich concerning debris jams at spillways as well as at racks for the retention of wooden debris were uniformly evaluated. On the one hand a significant increase of the backwater effect with a rising Froude number of the approach flow could be shown. This is in good correlation to recent test results for debris jams at retention racks at the Laboratory of Hydraulics, Hydrology and Glaciology of the Swiss Federal Institute of Technology Zurich. On the other hand a significant increase of the backwater effect could also be shown for a rising debris density. However, the test results also show that significantly different backwater effects can occur in different test runs with identical test conditions. These differences are a result of the randomness of debris jam development, and therefore, a more exact quantification of the dependence of the backwater effect on the Froude number of the approach flow and on the debris density is not considered useful for the present results.
2015-12-01T00:00:00Z