I have really learnt alot through you , thank you so much. I have also did my collage project through your videos. 🥰 Keep helping us with your knowledge . Allah will help you 🤲
Thank you Dr. El Gamal. All your videos are very impactful. Please we need you to do lectures on shear walls, stair cases and pile designs. Also, if you can Eurocode equivalents of all your previous videos it will go along way in switching to Eurocode.
TO measure the strain in rebar, under uniaxial tensile test we usually attach strain gauge to measure longitudinal strain. However, these strain gauges wont work after yielding of the bar. How can we get the plot of graph once the strain gauge stop working because of it limited strain measuring capacity
The strain can be also measured by measuring the displacement using LVDTs or from the testing machine. Then strain can be calculated by (Change in length/ original length).
@@MrElgamal77 if using a UTM machine to record the stroke (change in length) and later calcluate find the strain from it i have been told that its not accurate as it captures the displacement at global level unlike strain which captures changes at local level. Can you guide about this error in UTM machine measurement which also account for the global deformation addition to deformation of the specimen.
Thanks sir appreciate as best way to explain Sir I have one doubt that for yield stress of steel the safety factor is 1.15 So 0.87 fy please clarify my doubt.
شكرا كثير دكتور على شرحك ..دكتور لدي سؤال هل لما توصل الخرسانة عند الاجهاد الأقصى 0.67fcu تكون الخرسانة في مرحلة الدونة ؟ وهل بنصمم الخرسانة في مرحلة المرونة أم اللدونة
Concrete is not a ductile material as steel. When we reach failure, concrete will not be in the elastic stage. Therefore, when we design, all codes allows only the tension failure (failure in steel) and do not allow the compression failure (in concrete)
