Document Details

Document Type : Project 
Document Title :
High-strength concrete beams and pre-stress under the influence of Old and bending
الجيزان الخرسانية عالية القوة ومسبقة الأجهاد تحت تأثير اللي والإنحناء.
 
Document Language : Arabic 
Abstract : We have discussed the performance of Jizan of high-strength reinforced concrete and pre-stress under the influence of Old and under the combined effect of bending to me and where they were used Jizan and three meters in length with a longitudinal and cross-arm in addition to four bars of a strong arm a private pre-axial stress. Were selected twenty-eight permissible in two groups, each comprised of fourteen permissible where the first group was tested under the influence of Old and only the variables under consideration are as follows: - compression strength of concrete and prestressing force level and the percentage of torque to the torsion torque around. This may be used staple food Anzgat Khrasana amount of each "70" million Pascal and "90" million Pascal obtained after twenty-eight days of casting. As for the sector may have kept the area of ​​fixed and change the height and width as follows 240X240 mm, 340X170 mm, 420X140 mm to give the ratios rise to the following display: 1:1, 1:2, 1:3. This has been using pre-stress force levels by 9% and 4.5% of the compressive strength of concrete above. The results of this research and the existence of quasi-linear relationship between torque and rotation rate of up to 50% or more of the energy maximum permissible under the Old. Also found that the proportion of height to width may affect the strength and under the Old Gesath at all levels of loading. While the level of impact force on the prestressing force may be and after Gesath get cracking. Several methods were used to calculate the strength of the Old Jizan, as the researchers to propose amendments to the one which is the method of calculation may be based on the method of spatial scaling with the concrete cover to improve the results. 
Publishing Year : 1409 AH
1989 AD 
Sponsor Name : kau 
Sponsorship Year : 1409 AH
1989 AD 
Added Date : Wednesday, April 30, 2008 

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Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
فيصل فؤاد وفاwafa, faisal fouadInvestigatorDoctorate 

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