Concrete beam with reticular steel bars arranged at beam end

Abstract

The invention discloses a concrete beam with reticular steel bars arranged at a beam end. Under the effect of a symmetrical concentration load, main stress trace lines of a single support frame with a rectangular cross section are in a reticular shape at a near support seat shearing bending section (1), and the beam is easy to generate inclined cross section damage in the region. Reticular steel bars are distributed in region, the constraint force can be enhanced, the carrying capability of the inclined cross section of the beam is improved, the advanced crushing of the concrete in the shearing and pressing region is effectively prevented, the ductility of the beam is greatly improved, and the shock resistant performance of a component is improved. The reticular steel bars consist of vertical dense vertical ribs (3), vertical ribs (5) and dense hoop ribs (2), the configuration is simple, and the construction is convenient. Because weak parts of the beam are enhanced, the stress performance of the beam is greatly improved, the building material consumption can be relatively reduced under the condition of the same stress, and the cost is saved.

Description

technical field [0001] The invention relates to a concrete beam with reticular reinforcement arranged at the beam end. Background technique [0002] The traditional reinforced concrete beam mainly depends on the longitudinal steel bar (5) to bear the tensile force, and the concrete bears the pressure. However, when oblique cracks appear at the end of the beam, the steel bar in the tension zone is further stretched, and the concrete area in the shear compression zone is continuously reduced. Finally, the shear stress and Under the joint action of compressive stress, the concrete in the shear compression zone is crushed. Because the crushing of concrete is a brittle failure, the ductility performance of the beam is greatly reduced. If reinforcement is strengthened at the end of the beam and the weak part at the end of the beam is strengthened, the concrete in the shear compression zone will be prevented from being crushed in advance. This will not only improve the mechanical ...

AI Technical Summary

Problems solved by technology

Because the crushing of concrete is brittle failure, the ductility performance of the beam is greatly reduced

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