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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

web reinforcement การใช้

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