destruction, recording core samples (4) load values F at failure, and the end portion to measure the core sample at a distance L1 damage; c, the diameter D, the load value F, the distance L1 is substituted into flexural strength ft = formula obtained structural concrete flexural strength. ...
In this paper, the prediction of flexural strength was investigated using machine learning methods for concrete containing supplementary cementitious materials such as silica fume. First, based on a database of suitable characteristic parameters, the flexural strength prediction was carried out using linear...
In order to study the mechanism of strengthening the concrete beams with CFRP,the influence of secondary loads on the reinforcement was discussed,the complete flexural-course of the reinforced concrete beams was analyzed,the formulae for calculating the ultimate loads and the cracked loads were presen...
In 1979, Mattock' presented a procedure for calculating the flexural strength of prestressed concrete sections on an HP-67/97 programmable calculator. His procedure consisted of the theoretically exact "strain compatibility" method and a power formula for modeling the stress-strain curve of ...
In this paper, influences of key factors, including the degree of reinforcement, concrete strength, steel yield strength, compression steel ratio, and confining pressure, are studied based on a theoretical method. An empirical formula for direct evaluation of deformability is proposed. Interrelation ...
Moreover, it was concluded that results obtained from three-point bending tests significantly differed from empirical formulas for the calculation of the flexural tensile strength of fiber-reinforced concretes with dispersed steel fibers present in the literature. As a result, the new formula determined...
The axial load ratio, the FRP confinement ratio and the longitudinal reinforcement characteristic value are the three main parameters that can influence the neutral axis depth when concrete compression strain reaches an ultimate value. The formula for computing the central angle θ, corresponding to ...
For flexural tensile strength the k varies from 0.33 to 0.94 and n from 0.5 to 0.67 [2]. Although, most codes of practice recommend a square root function (n = ½) to relate flexural strength with compressive strength, it has been reported that for a wide range of concrete strengths ...
This paper presents a calculation method offlexural strengthabout reinforced concrete(RC) beams strengthened with carbon fiber reinforced polymer laminate. 提出了一种关于碳纤维片材加固钢筋混凝土梁的抗弯承载力计算方法,其中碳纤维加固梁的应用前提和使用阶段加固梁的验算公式是对现行规范的一种补充和完善,并提出...
6496.] A theoretical analysis of the behaviour of composite beams was checked experimentally, and formulae were developed for bond stresses... G Lantos 被引量: 33发表: 1970年 Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected to point or...