web reinforcement การใช้

• Based on shear transfer mechanism and carrying capacity of the cracking surface of rc members , the shear strength expression of the corroded rc structural elements without web reinforcement is obtained originally
• Abstract : based on the systematic analysis of the shear behavior for r . c . beams , the tests of 11 simple supported beams under the top concentrated loads and the uniform loads are supplemented . the prime variable is shear span ratio , span depth ratio , horizontal web reinforcement ratio and vertical web reinforcement ratio . according to the test results , the working behavior , the prime shear failure modes , the effect of concrete and web reinforcement ( horizontal web reinforcement and vertical web reinforcement ) and other aspects of r . c . beams are analysed . the uniform calculation method for shear capacity of deep beams , short beams and shallow beams for practical is presented
• The research works and conclusions of this paper as following : 1 . besed on the test results published over the word of reinforced concrete beams without web reinforcements and with stirrups , the systematically statistical analysis is carried out to set up the fomula of shear resistance of reinforced concrete beams using the uniaxial tensile strength of concrete . it provided the basis of strtistical analysis for shear resistance of steel fiber reinforced concrete beams
• The shear strength of the no corroded rc beams with stirrups is divided by two parts , that is the strength provided by the stirrups and the beams without web reinforcement . on the basis of this shearing mechanism of rc structural elements with web reinforcement , considering the confining effects of the stirrups , the shear carrying capacity expression of the corroded rc structural elements is given . the present results are compared with corresponding references and some reasonable conclusions are drawn
• 2 . based on the test results published over the word of steel fiber reinforced concrete beams without web reinforcements and with stirrups , the effects of steel fiber to shear resistance and the relationship of steel fiber to stirrups are analyzed , the improvements of steel fiber to failure states of reinforced concrete beams without web reinforcements are discussed . it is proposed that the formula of shear resistance of steel fiber reinforced concrete beams based on the model of the current design and construction spectification of steel fiber reinforced concrete structures ( cecs38 : 92 ) , used of the uniaxial tensile strength of steel fiber reinforced concrete , and combined with different formulas specified in current design codes of concrete structures issued by different trades
• A simplified formula for the shear capacity of rc simply supported beam which strengthened with the cmmr is proposed in this paper . 3 、 the shear capacity of rc beam strengthened with cmmr is studied . though the test of fourteen simply supported reinforced concrete beams and five overhanging reinforced concrete beams with cmmr , it analyses the effects of shear - span ratio , web reinforcement ratio of cmmr , style of loading , preloading on strengthening , and compares them with rc beams using ordinary stirrup