Steel-concrete push-out test loading device capable of applying tension and pressure

Abstract

The invention discloses a steel-concrete push-out test loading device capable of applying tension and pressure. The steel-concrete push-out test loading device comprises a horizontal loading mechanism, a horizontal sliding mechanism and a vertical loading mechanism. The horizontal loading mechanism comprises a horizontal counter-force frame, a horizontal force loading device, a containing platformand a front counter-force plate. The horizontal force loading device is mounted on the horizontal counter-force frame, and the front counter-force plate and the horizontal counter-force plate are oppositely arranged on the containing platform. Horizontal sliding grooves are formed in the two sides of the containing platform. The horizontal sliding mechanism can move back and forth along the horizontal sliding grooves. The vertical loading mechanism is mounted on the horizontal sliding mechanism and achieves vertical loading. According to the device, the negative factors that a push-out test component is large in size and weight, is limited by test sites and can only carry out simple shear force loading are overcome, and wide development prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and specifically relates to a tension and pressure loading device and method for a steel-concrete push-out test. Background technique [0002] The interfacial slip behavior of steel-concrete composite beams is usually studied by push-out tests. In order to ensure that the specimen is not eccentrically loaded, the existing push-out test usually sets two symmetrical concrete blocks, and an I-shaped steel beam is set in the middle, and the two side flanges of the I-shaped steel beam are welded with shear connectors. It can be shear studs, PBL shear connectors, steel shear connectors, etc., which are respectively embedded in the concrete blocks on both sides to form a whole. When loading, the specimen is placed under the universal testing machine, the concrete block is close to the ground, and the testing machine applies a shear thrust downward to the I-beam until the shear connector ...

AI Technical Summary

Problems solved by technology

Since the shear connectors on the two side flanges of the I-beam need to be embedded in two concrete blocks, the test piece is difficult to manufacture, heavy in weight, high in cost and time-consuming; it can only be loaded by a universal testing machine during loading, resulting in The push-out test is greatly restricted by site factors and can only be carried out in the laboratory; the actual working state of the steel-concrete composite beam shear connection may be subjected to tensile shear or compressive shear at the same time, and the existing push-out test can only simulate the shear effect. The actual working state of the composite beam has some discrepancies

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