![]() | Only 14 pages are availabe for public view |
Abstract ABSTRACT The objective of this thesis is to investigate the effect of loading and supporting area on shear behavior of concrete deep beams, examine the effect of this parameter on size effect of deep beams, and to Study of current design codes procedures and accuracy for predicting shear strength for concrete deep beams. This thesis is carried out with a focus on validating the theoretical data against actual experimental results. All results are compared together to reach a conclusion on how to predict accurately the shear strength of deep beams taking into consideration size effect phenomenon. The thesis is divided into seven chapters. Chapter 1: Introduction This chapter presents an overview of the research that includes introduction, problem statement and motivation. This chapter also provides a description of the main and sub-objectives of the research. Chapter 2: Literature Review The literature review is presented in Chapter 2.The review covers the basic shear theory in beams and deep beams, description of the size effect phenomenon, the main factors that effects shear behavior and size effect, and previous studies done by other researches. Chapter 3: Experimental Work Chapter 3 is describing the experimental program done in this research in details, from materials used, casting procedure to the specimen’s details, and finally the testing procedure. Chapter 4: Experimental Results Chapter 4 focuses on showing the cracking patterns, load deflection relationship, cracking and ultimate loads, and failure modes of tested specimens. Chapter 5: Discussion of Experimental Results This chapter describes the results displayed in the previous chapter, and the comparison between the experimental results by classifying the tested beams in multiple groups to better understand the effect of the studied parameters. Chapter 6: Theoretical Analysis In chapter 6, the methods described in the Egyptian, American, and European codes are used to calculate the shear strength of the beams, computer software CAST is also used to obtain results from strut and tie models. All these result are then compared with the experimental results. Chapter 7: Conclusion and Future Work As the final chapter in this thesis, chapter 7 highlights the contributions and the conclusions reached from both analytical and experimental studies, it also suggests future work that can carried out to take into consideration other parameters that have not been the focus of this thesis. |