Abstract Steel joints are the main part a steel structure. The steel members come together in a joint, to where the load action will be transferred between them.These members are with different section properties, may be joined with different type of connections welds, bolts or rivets. The level of fixity is also important which varies from flexible, semi-rigid to fixed. There is also an important factor of joint behavior, the type of loading (tension, shear, bending and torsion). For these the mentioned different factors that affects the behavior of a joint very complicated to demonstrate exactly.The design procedure according to the well known specification is generally based on experimental studies.The present study tries to throw light on some factors affecting the strength consideration for designing beam to columnconnection because of its importance in steel structures from point of view of uses.
علي عبدالله الجعط (2008)

Multi-layered Prepacked aggregate fibrous composite (MLPAFC) is a new type of concrete, which is prepared in two subsequent stages of aggregate-fibre skeleton prepacking and cementitious grouting. In this study, ten MLPAFC mixtures were prepared in three subsequent layers incorporating different contents of four different types of steel fibres. Long and short hooked-end and crimped steel fibers were adopted with 3.0 and 1.5% dosages for the outer and interior layers, respectively. In-between the three MLPAFC layers, two layers of Glass Fiber Mesh (GFM) were inserted in five of the ten mixtures. The impact response of the MLPAFC mixtures was evaluated using two test methods. In the first, the ACI 544-2R repeated free-falling weight test was followed using disk specimens, while flexural free-falling weight on prism specimens was the second adopted impact test. Moreover, Weibull distribution was used to statistically analyse the discrepancies of the obtained experimental impact records. The impact tests results revealed that MLPAFC can absorb significantly high energy under falling weight impact due to its structure and the dual crack arresting activity of both steel fibers and GFM. The cracking number of impacts of MLPAFC cylindrical specimens without GFM was increased by approximately 530–870% compared reference specimens, while increment percentages reaching 1350% were recorded at failure stage. The impact resistance of MLPAFC prisms under flexural impact was noticeably improved, yet with lower percentages than cylindrical specimens. The insertion of intermediate GFMs let to additional developments in the impact strength of both cylindrical and prism specimens. arabic 14 English 97
Hakim S. Abdelgader (12-2020)

Abstract this study aims to investigate the hydrological cycle at wadi Zaghadnah basin in Tarhuna in terms of (rainfall-surface run-off-evaporation-infiltration) and estimation of the quantity of surface water , and to predict the maximum flood can happen in order to reduce hazardous to houses and farms that are found on my profile of the valley was the use of a series of years of readings rainfall and results have indicated to the fact that annual average rainfall was (238) mm, via using (Isohyetal method).The quantity of water which is supposed to be reserved in the dam was (1.94) million cubic meters. As for rain test, it was found that it is random and non-coherent. Having studied rain-wave relation through application of modelprediction statistical, it was deduced that it is not reliable to depend-upon in forecasting the expected rain. Results have indicated that total evaporation average to (2324.5)mm via using (CROPWAT) and average annual infiltration is (2065.17)mm, and post application of some statistic equations like probability log-Pearson Type ׀׀׀distribution and Gumbels distribution-plotting (25-50-100-1000), maximum possible amount (via using the aforesaid three methods) was found, but due to silt and likely erosion of soils as a result of flooding, silt amounts in Dom lake was estimated by using calculative equations was (5622)m³/year.
عيادة محمد ميلاد اليونسى (2012)