Accession Number : AD0807322

Title :   BENDING OF A CRACKED, REINFORCED VISCOELASTIC BEAM.

Descriptive Note : Interim technical rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY STRUCTURAL ENGINEERING LAB

Personal Author(s) : Sackman, J. L. ; Nickell, R. E.

Report Date : DEC 1966

Pagination or Media Count : 62

Abstract : Conventional cracked, reinforced concrete beam theory is extended to include general linear viscoelastic behavior of the matrix (concrete) material in compression. An analytical formulation is developed which leads to a single governing equation on the position of the neutral axis. Although it has not been possible to obtain a general closed solution, some important properties of the solution of this nonlinear, Volterra-type integral equation are established. The relationship of this theory to a popular approximate procedure, known as the effective modulus method, is discussed. The nonlinear integral equation is resolved numerically and results are shown for several cases of interest. (Author)

Descriptors :   *REINFORCED CONCRETE), (*BEAMS(STRUCTURAL), (*STRESSES, BENDING), CRACKS, INTEGRAL EQUATIONS, COMPRESSIVE PROPERTIES, MODULUS OF ELASTICITY, VISCOELASTICITY.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE