Concrete-steel Construction (Der Eisenbetonbau) |
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Concrete-Steel Construction: (Der Eisenbetonbau) Emil Morsch,Ernest Payson Goodrich No preview available - 2016 |
Common terms and phrases
according adhesive stress angle approx arch arrangement assumed bending breaking load bridge building carried cement centroid cm² compressive strength compressive stresses continuous beams corresponding cracks appeared cross-section curve deformation determined diagonal cracks diagonal tensile diameter distribution elastic limit employed ends equal equation experiments factor of safety failure floor slabs forces formula girders horizontal increase kg/cm² lbs/in² lateral layer lbs in² lbs/in2 kg/cm2 Leitsätze length live load longitudinal rods maximum ment meter modulus of elasticity moment of inertia moments Monier neutral axis obtained pressure rectangular sections reinforced concrete beams reinforcing rods resistance ribs round rods rupture shearing strength shearing stresses shown in Fig side silos spacing span specimens Stage IIb steel stress stirrups straight rods structural T-beams Table tensile and compressive tensile strength tensile stresses tension cracks tests thick tion tons upper vertical walls Wayss & Freytag width
Popular passages
Page 340 - Theoretically there is an indefinite number of values of r, the ratio of the moduli of elasticity of the steel and the concrete. "The modulus for steel is fairly constant at about 29,000,000 or 30,000,000. The value of the initial modulus for concrete varies according to the quality of the concrete, from 1,500,000 to 3,000,000 for stone concrete.
Page 322 - A, by n, the ratio of the modulus of elasticity of steel to that of concrete. For compressive reinforcing, the area A„.
Page 205 - ... evolved, according to which the design of reinforced concrete work could be effected, and through these preliminary labors, this method of construction was extensively adopted in Germany and Austria. A turning point in its development was the International Exposition in Paris, in 1900, and the report by Emperger, published at that time in regard to the position which the subject occupied. Because of the scientific investigation of reinforced concrete during the past few years, it has made rapid...
Page 63 - It is seen from these values that an increase in the area of longitudinal reinorcement does not produce an increase -in the breaking strength to the extent which would be indicated by the formula Specimen about 3 Months Old Breaking Strength Diameter of Rods Tie Spacing Average cm. in. cm. in. kg 'cm8 lb/in...
Page 258 - T beams are cheaper than simple slabs. . . . The usual arrangement is (then) to span the opening with several similar parallel girders and lay a floor slab between them. . . . T-beam bridges of this type, of spans up to 16 m. (52 ft.), are entirely practicable and In most cases cheaper than steel bridges. Special Instances exist of 20 m. (66 ft.) spans. . . . With wider spans, the girders become rather heavy, so that T-beam bridges possess little superiority over steel...
Page 262 - An important advantage of such reinforced concrete bridges over railways, is that they are not affected by the gas:s from the locomotives, which, in the case of busy stretches of track, and where difficult of access, cause active corrosion and high maintenance charges for steel structures.
Page 17 - LABORATORY OF THE ROYAL TECHNICAL HIGH SCHOOL, STUTTGART In America various forms of reinforcement are employed, all of which are designed to prevent slipping of the rod in the concrete. In the Ransome rod (Fig. 20), this is secured by twisting the square steel bar; in the Johnson bar, F1G. 20. elevations on the surfaces of the rods are produced in the rolling: and the Thacher or knotted bar is provided with swellings, while maintaining a constant sectional area. These "knots...
Page 195 - But even when the proportionality ceases with higher loading, the stress distribution is not greatly altered, as the following simple cases show: As an extreme case it will be assumed that the angle of inclination between the adjacent sections is proportional to the third power of the moments (so that the deflection diagram of Fig. 177 would be a cubical parabola), and thus wherein C represents some constant. For a beam fixed at both ends, and carrying a concentrated load P at the center, p...