CN106400667A - Hollow plate beam structure for ultrahigh performance concrete hinge joint connection - Google Patents

Abstract

The invention provides a hollow plate beam structure for ultrahigh performance concrete hinge joint connection. The hollow plate beam structure comprises a hollow plate beam. A plurality of hollow plate beam side faces are connected though steel bars to form a hinge joint structure which is filled with ultrahigh performance concrete; the two sides of the part, close to the upper end, of the hollow plate beam are concave inward; the upper end of the hollow plate beam is provided with horizontally stretching steel bars stretching out from the two inward-concave sides; the two ends, stretching out of the two sides of the hollow plate beam, of each horizontally stretching steel bar are bent to form hooks; the positions, close to the two sides, of the hollow plate beam are provided with perpendicularly stretching steel bars which upward stretch out of the hollow plate beam; a semicircular circle is defined by each perpendicularly stretching steel bar and the corresponding hook; the circles of every two adjacent hollow plate beam side faces are overlapped; longitudinally penetrating steel bars penetrate into the overlapped circles; the horizontally stretching steel bars, the perpendicularly stretching steel bars and the longitudinally penetrating steel bars are fixed as a whole. According to the hollow plate beam structure, the hinge joint hook steel bars and the longitudinally penetrating steel bars are additionally arranged, and a hinge joint is filled with ultrahigh performance concrete, so that the transverse connection performance, the durability and the safety are largely improved.

Description

Hollow slab-beam structure of ultra-high performance concrete hinged joints

technical field

The invention relates to the technical field of hollow slab beams, in particular to a hollow slab beam structure connected by hinge joints of ultra-high performance concrete.

Background technique

The existing hollow slab girders (as shown in Figure 1) are weak in hinged joints, and the concrete in the hinged joints is easily broken, which greatly affects their durability and safety. In recent years, it has gradually begun to be Be eliminated. At present, the industry has changed it to a rigidly connected hollow slab girder, but the construction process of the rigidly connected hollow slab girder is complicated, and formwork needs to be erected, which makes the hollow slab girder structure lose its original convenience and speed.

Therefore, there is an urgent need for a hollow slab girder with high durability and safety to overcome the deficiencies in the prior art.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a hollow slab beam structure of ultra-high performance concrete hinged joints. One of the purposes achieved is to increase hinged hook steel bars and longitudinal perforated steel bars to greatly improve the hinged hollow slab structure. The transverse connection performance of the beam improves the durability and safety of the hollow slab beam structure.

To achieve the above object, the present invention is achieved through the following technical solutions:

A hollow slab beam structure connected by ultra-high-performance concrete hinges, including hollow slab beams, the sides of several hollow slab beams are connected by steel bars to form a hinged joint structure, and the hinged joint structure is filled with ultra-high performance concrete.

Wherein, several groups of steel bars are arranged in the hollow plate beam along the length direction, and each group of steel bars includes horizontally extending steel bars, vertically extending steel bars, and longitudinally penetrating steel bars.

The cross-section of the hollow slab girder is in a "convex" shape, and the two sides of the hollow slab beam near the upper end are concave, and the upper end of the hollow slab beam is provided with the horizontal protrusion protruding from the concave on both sides. As for the steel bar, the two ends of the horizontally protruding steel bar protrude from both sides of the hollow slab girder and bend to form hooks.

The hollow slab beam is provided with the vertically protruding steel bars near both sides, and the vertically protruding steel bars protrude upwards from the hollow slab girder, forming a semicircular circle with the hook.

The circles on the sides of each two adjacent hollow slab beams overlap each other, and the longitudinal penetrating steel bars are pierced in several groups of overlapping circles, the horizontally protruding steel bars, the vertically protruding steel bars, The longitudinal penetrating steel bars are fixed as a whole.

Preferably, the concrete filled in the hinged joint structure is ultra-high performance concrete UHPC.

Preferably, the part of the vertically protruding steel bar extending above the hollow slab girder is bent toward the direction of the adjacent hollow slab girder.

Preferably, two of the longitudinal penetrating steel bars (N3) are pierced in several groups of overlapped circles.

Beneficial effects of the present invention:

The invention adds hinged hook steel bars and longitudinal perforated steel bars, greatly improves the transverse connection performance of the hinged hollow slab girder, and improves the durability and safety of the hollow slab girder structure.

The present invention uses ultra-high performance concrete (UHPC) as the concrete for filling the hinge joint, which greatly improves the strength of the hinge joint, and improves the durability and safety of the overall structure of the hollow slab girder.

The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, on the premise of not paying creative work, other drawings can also be obtained based on these drawings.

Figure 1 shows a schematic view of the existing hollow slab girder structure.

Fig. 2 is a schematic diagram of a cross-sectional structure of a hollow plate girder structure according to an embodiment of the present invention.

Fig. 3 shows a schematic diagram of the side structure of a hollow plate girder structure according to an embodiment of the present invention.

Fig. 4 is a schematic view of the plan view of the hollow plate girder structure according to an embodiment of the present invention.

Fig. 5 is a partially enlarged schematic diagram of a hinge joint structure connecting two adjacent hollow plate girder structures in an embodiment of the present invention.

FIG. 6 shows a schematic view of the top view of FIG. 5 .

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Figures 1 to 6, a hollow slab girder structure connected by hinge joints of ultra-high performance concrete includes hollow slab girders. The joint structure is filled with concrete N4.

Wherein, several groups of steel bars are arranged in the hollow slab beam along the length direction, and each group of steel bars includes horizontally protruding steel bars N1, vertically protruding steel bars N2, and longitudinally penetrating steel bars N3.

The cross-section of the hollow slab girder is in a "convex" shape, and the two sides of the hollow slab beam near the upper end are concave, and the upper end of the hollow slab beam is provided with the horizontal protrusion protruding from the concave on both sides. The reinforcing bar N1, the two ends of the horizontally protruding reinforcing bar N1 protruding from both sides of the hollow slab beam are bent to form hooks.

The vertically protruding steel bar N2 is provided near both sides of the hollow slab beam, and the vertically protruding steel bar N2 protrudes upward from the hollow slab beam to form a semicircular circle with the hook.

The circles on the sides of every two adjacent hollow slab beams overlap each other, and the longitudinal penetrating steel bars N3 are pierced in several groups of overlapping circles, the horizontally protruding steel bars N1, the vertically protruding The reinforcing bar N2 and the longitudinally penetrating reinforcing bar N3 are fixed into one body.

The principle of the present invention is as follows: the hinge seam of the original hollow slab girder is appropriately enlarged, and the horizontally protruding steel bars N1 with hooks are used. The mid-longitudinal penetrating steel bar N3 is bent and combined with the vertical out-of-plane steel bar N2 on the bridge surface to form a three-way enclosed hinged joint steel bar, and then combined with the joint-filled ultra-high performance concrete (UHPC) to form a new hollow slab Beam hinge joints make the hinge joints have strong transverse connection performance and improve fatigue resistance, thereby improving the safety and durability of the bridge structure as a whole.

In certain embodiments, the concrete N4 filled in the joint structure is ultra high performance concrete UHPC.

In some embodiments, the portion of the vertically protruding steel bar N2 extending above the hollow slab girder is bent toward the direction of the adjacent hollow slab girder.

In some embodiments, two of the longitudinal penetrating steel bars (N3) are pierced in several overlapping groups of the circles.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (4)

1. A hollow slab beam structure connected by an ultra-high-performance concrete hinge joint, including a hollow slab beam, and the sides of several hollow slab beams are connected by steel bars to form a hinge joint structure, and the hinge joint structure is filled with ultra-high performance concrete (N4); it is characterized in that several groups of reinforcing bars are arranged along the length direction in the hollow slab beam, and each group of reinforcing bars includes horizontally extending reinforcing bars (N1), vertically extending reinforcing bars (N2), and longitudinally penetrating reinforcing bars (N3) , the cross-section of the hollow slab beam is "convex" shape, the two sides of the hollow slab beam near the upper end part are concave, and the upper end of the hollow slab beam is provided with the horizontal extension protruding from the concave on both sides. Out of the steel bar (N1), the two ends of the horizontally protruding steel bar (N1) protrude from both sides of the hollow slab beam to form hooks; the hollow slab beam is provided with the vertical protruding Reinforcing bar (N2), the vertically protruding reinforcing bar (N2) protrudes upwards from the hollow slab beam, forming a semicircular circle with the hook; every two adjacent hollow slab beams on the side The circles are overlapped with each other, and the longitudinal penetrating reinforcing bars (N3) are pierced in several overlapping circles, the horizontal protruding reinforcing bars (N1), the vertical protruding reinforcing bars (N2), the longitudinal penetrating reinforcing bars Reinforcement bars (N3) are fixed in one piece. 2. The hollow slab beam structure of ultra-high performance concrete hinge joint connection as claimed in claim 1, characterized in that, the concrete (N4) filled in the hinge joint structure is ultra high performance concrete UHPC. 3. The hollow slab beam structure of the ultra-high performance concrete hinge joint link as claimed in claim 1, wherein the vertically protruding steel bar (N2) stretches out from the part above the hollow slab beam to the adjacent Bending in the direction of the hollow slab beam. 4. The ultra-high performance concrete hinged hollow slab beam structure according to claim 1, characterized in that two longitudinally penetrating steel bars (N3) are pierced in several overlapping circles.