CN203669204U - Trussed steel reinforced concrete coupling beam - Google Patents

Abstract

The utility model relates to a truss-type steel-reinforced concrete connecting beam, which comprises a concrete connecting beam. The concrete connecting beam is provided with a truss-type steel frame, and the truss-type steel frame extends into a shear wall connected with the concrete connecting beam at both ends. , the truss-type steel frame is composed of chords and webs, the chords and webs are connected, the chords are T-shaped sections, and the webs are oblique webs and vertical webs, The diagonal rod is in the shape of a cross, and the inclination angle of the diagonal rod is 30°-60°. The repeated tensile and compressive deformation of the crossed diagonal bars can dissipate the seismic energy to a certain extent. The truss member and concrete have a relatively large bonding force, and no shear key is required. The coupling beam has high rigidity, good ductility, and strong energy dissipation capacity, and fully utilizes and exerts the respective advantages of the two materials of concrete and steel. The utility model has the characteristics of reasonable structure, steel saving, simplified structure and convenient construction.

Description

Truss type steel reinforced concrete connecting beam

technical field

The utility model relates to a connecting beam, in particular to a truss type steel reinforced concrete connecting beam.

Background technique

The coupling beam is an important component of the shear wall with openings. Under horizontal loads such as earthquakes, the wall piers are bent and deformed, causing deformation and internal force on the coupling beams. At the same time, the deformation of the coupling beams also plays a certain role in restraining the wall piers, improving the stress state of the wall piers. The coupling beam with good ductility, under the action of earthquake, the coupling beam enters the plasticity before the wall pier, and the beam end forms a plastic hinge, which can not only absorb a large amount of energy, delay the yielding of the wall pier, but also restrain the wall pier by the coupling beam to a certain extent. Make the shear wall maintain sufficient rigidity and strength. Due to the small span-to-height ratio of the coupling beam and the high stiffness of the wall connected to it, the internal force of the coupling beam is often very large under the action of the horizontal force. Even if various measures are taken to reduce the internal force of the coupling beam during design, it is still difficult to make the design of the coupling beam meet the requirements. Therefore, finding a coupling beam form with good seismic performance, sufficient stiffness and bearing capacity is related to the seismic performance of the shear wall, and is a key technology in the shear wall structure with openings.

Many scholars at home and abroad have done a lot of research on coupling beams, and proposed reinforced concrete coupling beams, improved reinforced concrete coupling beams, steel structure coupling beams, and steel concrete coupling beams. Reinforced concrete coupling beams have simple structure, convenient construction, and low cost, but their deformation capacity is not good, and the rotational deformation capacity of the section is limited, which often leads to cable-tension failure or shear-slip failure, resulting in a decrease in energy dissipation capacity. The improved reinforced concrete coupling beam has greatly improved its ductility and energy dissipation performance, but it also has many shortcomings, such as complex structure and construction, insufficient deformation performance and so on. Steel coupling beams have obvious advantages over concrete coupling beams in terms of strength, ductility, and construction, and can be easily replaced and repaired after a major earthquake. However, there are problems such as large steel consumption, insufficient coupling beam stiffness, and fire and corrosion protection. Steel concrete coupling beams have good ductility and energy dissipation performance, but there are also disadvantages such as large steel consumption and insufficient bonding performance between steel and concrete.

Contents of the invention

The technical problem to be solved by the utility model is to provide a truss-type steel-reinforced concrete connecting beam with good seismic performance, sufficient rigidity and bearing capacity, and easy design.

The technical solution to solve the above technical problems is: a truss-type steel-reinforced concrete connecting beam, including a concrete connecting beam. In the shear wall, the truss-type steel frame is composed of chords and webs, the chords and webs are connected, the chords are T-shaped sections, and the webs are oblique webs and vertical poles.

The further technical scheme of the utility model is: the diagonal web bar and the vertical web bar are angle steel, and the chord bar is connected with the web bar by welding.

The inclination angle of the diagonal rod is 30°-60°.

The chords are upper chords and lower chords, the vertical webs are vertical bars, the oblique webs are inclined bars in the middle of the connecting beam and the anchoring inclined bars at the beam end, and the vertical bars and the middle part of the connecting beam are The oblique rod and the beam-end anchoring oblique rod are respectively welded between the upper chord and the lower chord, and the oblique rod in the middle of the connecting beam and the beam-end anchoring oblique rod are respectively in a cross shape.

When the span-height ratio of the truss-type steel-reinforced concrete connecting beam is less than or equal to 1, the number of internodes in the middle is 1 internode; when the span-height ratio of the truss-type steel-reinforced concrete connecting beam is greater than 1, the number of internodes in the middle The number is 2 internodes.

Due to the adoption of the above technical scheme, the truss type steel reinforced concrete connecting beam of the utility model has the following beneficial effects compared with the existing connecting beam:

1. This utility model is a new type of coupling beam form based on the above technical background, in order to avoid the lack of the above coupling beam form, make full use of the respective advantages of steel and concrete, and obtain a new type of coupling beam structure with excellent seismic performance . The concrete connecting beam in the utility model is equipped with a truss-type steel frame, which fully utilizes the advantages of steel and concrete, greatly improves the seismic performance of the concrete connecting beam such as stiffness, ductility, and energy dissipation performance, and avoids the steel structure connecting beam slab The parts are easy to buckle and the possible insufficient rigidity of the connecting beams avoids the disadvantages of poor bonding performance of the steel concrete connecting beams, thus avoiding the respective shortcomings of the existing connecting beams; and the truss members and concrete have a large bonding force, No shear key is required.

2. The utility model adopts the steel truss-type steel frame, which is simple to manufacture, convenient to construct, and easy to design, and saves steel to a certain extent. At the same time, the chord of the truss-type steel frame replaces or partially replaces the longitudinal steel bar, and the diagonal rod replaces the concrete. The function of the crossed inclined reinforcement and some stirrups in the coupling beam simplifies the complex reinforcement of the concrete coupling beam. In addition, when a large earthquake occurs, the cross diagonal members dissipate the seismic energy through repeated tensile and compressive plastic deformation, which further improves the energy dissipation performance of the coupling beam. the

3. The truss-type steel-reinforced concrete connecting beam of the utility model is a new type of connecting beam that uses a steel truss as a steel frame to improve the ductility and hysteretic energy consumption performance of the concrete connecting beam. At the same time, the concrete has the double-layer effect of both the stress and the protective layer, which improves the overall stability of the steel frame and the local stability of the steel plate, and is more conducive to the energy dissipation performance of the coupling beam. The truss-type steel frame of the utility model is composed of T-shaped steel as the chord and angle steel as the web, which are connected by welds, and the different layout forms of the web can meet the seismic design requirements of the connecting beam. In the utility model, the oblique web rods are cross-shaped, and the repeated tension and compression deformation of the cross oblique web rods can dissipate seismic energy to a certain extent.

Below, the technical features of the truss-type steel reinforced concrete connecting beam of the utility model will be further described in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1: It is the structure diagram of the truss type steel reinforced concrete connecting beam of the utility model.

Fig. 2: is the I-I sectional view in Fig. 1. the

In the above-mentioned accompanying drawings, each label is explained as follows:

1-top chord, 2-bottom chord, 3-vertical bar, 4-slope in the middle of the connecting beam, 5-anchored slant at beam end, 6-shear wall.

Detailed ways

A truss-type steel-reinforced concrete connecting beam, comprising a concrete connecting beam, the concrete connecting beam is provided with a truss-type steel frame, and the truss-type steel frame extends into the shear wall 6 connected with the concrete connecting beam at both ends, and the The truss-type steel frame is composed of chords and webs, the chords and webs are welded, the chords are T-shaped sections, the webs are oblique webs and vertical webs, and the Angle steel is used for the oblique web bar and the vertical web bar, and the inclination angle of the oblique web bar is 30°-60°.

The chords are upper chords 1 and lower chords 2, the vertical webs are vertical bars 3, the oblique webs are connecting beam middle inclined bars 4 and beam end anchoring inclined bars 5, and the vertical webs are The rod 3, the slanting rod 4 in the middle of the connecting beam and the anchoring slanting rod 5 at the beam end are respectively welded between the upper chord 1 and the lower chord 2, and the vertical rod 3 is vertically welded between the upper chord 1 and the lower chord 2, so The inclined rod 4 in the middle of the connecting beam is welded between the upper chord 1 and the lower chord 2 in a cross shape, and the anchor rod 5 at the beam end is welded between the upper chord 1 and the lower chord 2 in a cross shape. , or one end of the beam end anchoring oblique bar 5 is welded on the upper chord 1 or the lower chord 2, and the other end is welded on the vertical bar 3, and the beam end anchoring oblique bar 5 and the vertical bar 3 are K-shaped.

The number of internodes in the middle of the truss-type steel-reinforced concrete connecting beam can be set to different values according to the span-height ratio of the truss-type steel-reinforced concrete connecting beam. For example, when the span-height ratio of the truss-type steel-reinforced concrete connecting beam is less than or equal to 1, The number of internodes in the middle is 1 internode; when the span-to-height ratio of the truss-type steel-reinforced concrete coupling beam is greater than 1, the number of internodes in the middle is 2 internodes; the middle section of the truss-type steel-reinforced concrete coupling beam The number of intervals can be selected according to the specific situation, and the inclination angle of the diagonal web members will not be too large or too small; Figure 1 shows a steel frame truss with two internodes in the middle of the truss-type steel reinforced concrete connecting beam.

As a modification of this embodiment: the inclination angle of the diagonal rod can be properly adjusted according to the actual situation.

Claims (5)

1. A truss-type steel-reinforced concrete connecting beam, comprising a concrete connecting beam, is characterized in that: the described concrete connecting beam is provided with a truss-type steel frame, and the truss-type steel frame stretches into two ends to be connected with the concrete connecting beam. In the wall (6), the truss-type steel frame is composed of a chord and a web, the chord and the web are connected, the chord is a T-shaped section, and the web is a diagonal and vertical poles. 2. The truss-type steel-reinforced concrete connecting beam according to claim 1, characterized in that: the diagonal webs and vertical webs are angle steels, and the chords are connected to the webs by welding. 3. The truss-type steel-reinforced concrete connecting beam according to claim 1, characterized in that: the inclination angle of the diagonal members is 30°-60°. 4. The truss-type steel reinforced concrete connecting beam according to any one of claims 1-3, characterized in that: the chords are upper chords (1) and lower chords (2), and the vertical webs The rod is a vertical rod (3), and the diagonal web rod is a diagonal rod in the middle of the connecting beam (4) and an anchoring diagonal rod (5) at the end of the beam. The vertical rod (3), the diagonal rod in the middle of the connecting beam (4) and the beam-end anchoring bars (5) are respectively welded between the upper chord (1) and the lower chord (2), and the said connecting beam middle bar (4) and the beam-end anchoring bars (5) are respectively cross-shaped . 5. The truss-type steel-reinforced concrete connecting beam according to claim 4, characterized in that: when the span-to-height ratio of the truss-type steel-reinforced concrete connecting beam is less than or equal to 1, the number of internodes in the middle is one internode ; When the span-to-height ratio of the truss-type steel reinforced concrete coupling beam is greater than 1, the number of internodes in the middle is 2 internodes.

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