Experimental Study On Steel Plate Reinforced Concrete Beam Fatigue Mechanical Properties

Nowadays, steel-bonding have been the most popular ways to strengthen reinforce R.C structures in demestic and abroad. it has a lot of applications in the practical works. In the static load, steel reinforcement effect of basic construction technology can meet the engineering requirements. However, the fatigue behavior of the concrete beams is different, and it is necessary to study it, especilly to promote this structural style into application. The experimental study and theoretical analysis on one steel-bonding reinforced concrete beams and three flexural capacity of reinforced concrete beams are carried out. and the static experimental study on the flexural behavior of test beam .The contents of this paper include six chapters as follows.In the first chapter, the relevant literatures and significance of the studies are expounded, meanwhile, the historical and the present backgrounds of the research at home and abroad are introduced systematically. Based on the existing problems, the objectives of this paper are put forward.In the second chapter, the experimental programs include the mechanics properties of materials, of the beam specimens and load scheme. Then the main test results provided, and fatigue failure pattern, fatigue life of the test beams are analyed. Test results show that the steel reinforcement experimental beams anti-fatigue performance is good, adhesive steel rivet consolidation tests beam anti-fatigue performance is poor.In the third chapter, on the basis of test results, the plane cross-section assumption is proved and the depth of compression zone changes litter for the test beams under fatigue loading. Additionally, the stress development of stell plates in the beams and the crack reason of stell platesis analyed.In the fourth chapter, the deformation and crack rule of test beams under fatigue lording is analyed according to experimental results, The influence factors of crack width, Then the calculation method of the deflection and crack width is studied.In the fifth chapter, through the static experimental study on the flexural behavior of test beam, the effect of fatigue loading on the post-cyclic static strength, rigidity and crack is studied. Test results show that the fatigue load bearing capacity of static test.In the sixth chapter, the main achievements of the paper are summarized, and the further research of this field is pointed out.