CN103061451A - Horizontally-sliced composite coupling beam with cave opening concrete wall body and construction method thereof - Google Patents

Abstract

The invention relates to a horizontally layered composite connecting beam with a concrete wall with an opening and a construction method thereof, which belongs to the field of civil engineering and is mainly used in construction engineering. The horizontally split composite connecting beam includes an upper sub-coupling beam, a horizontal isolation layer and a lower sub-coupling beam, forming a composite cross-section form arranged in horizontal layers. The beam width of the upper sub-coupling beam and the lower sub-coupling beam are the same as the thickness of the wall, equipped with longitudinal reinforcement and stirrup, made of concrete pouring, and the longitudinal reinforcement is anchored in the concrete wall at both ends; the horizontal isolation layer is located in the lower sub-coupling beam Lightweight and low-strength materials such as aerated concrete, foam concrete or polystyrene boards are used to cover the upper surface of the upper layer and the lower surface of the upper sub-coupling beam, and also serve as the bottom formwork of the upper sub-coupling beam during construction. The invention is beneficial to realize the concept of strong shear-weak bending in coupling beam design and strong wall and weak beam in wall design, improves the anti-seismic performance of concrete walls, is convenient for construction, and is economical and reasonable, and can be popularized for multi-story concrete structure buildings.

Description

Horizontal Layered Composite Coupling Beam with Opening Concrete Wall and Its Construction Method

technical field

The invention relates to a horizontal layered composite connecting beam with a concrete wall with openings and a construction method thereof, which is applied to multi-storey and high-rise buildings and belongs to the technical field of building structures.

Background technique

Concrete walls with openings are widely used in multi-storey and high-rise building structures. The connecting beams above the door and window openings in the wall connect the wall piers on both sides. The arrangement of coupling beams has a great influence on the seismic performance of the wall. When the span of the opening is small and the cross-section height of the coupling beam is large, the ordinary coupling beam designed according to the traditional method has a small span-to-height ratio, and it is easy to become a strong coupling beam, which is prone to shear failure during an earthquake, which is very unfavorable for earthquake resistance. In view of the above situation, the present invention proposes to replace the ordinary connecting beam with a small span-to-height ratio designed according to the traditional method with a horizontally layered composite connecting beam, so as to avoid the shear failure of the connecting beam during an earthquake and replace it with the flexural yielding of the beam end and exert its full strength. The effect of energy dissipation improves the seismic performance of the concrete wall with openings.

Contents of the invention

The object of the present invention is to provide a horizontally layered composite connecting beam with a concrete wall with a hole and a construction method thereof.

The present invention adopts following technical scheme:

The horizontally layered composite connecting beam of the concrete wall with openings proposed by the present invention comprises an upper layer of sub-connecting beams, a horizontal isolation layer and a lower layer of sub-connecting beams, forming a composite section form of horizontal layering. The beam width of the upper sub-coupling beam and the lower sub-coupling beam are the same as the thickness of the wall, equipped with longitudinal bars and stirrups, made of concrete pouring, and the longitudinal bars are anchored in the concrete walls at both ends; the horizontal isolation layer is located in the lower sub- Between the upper surface of the coupling beam and the lower surface of the sub-coupling beam of the upper layer, the spacer material is completely covered.

The isolation material of the horizontal isolation layer is light and low-strength material, including aerated concrete, foam concrete or polystyrene board, and its compressive strength value should be less than 2MPa.

The horizontally layered composite connecting beam can be used in situations where there are openings in various types of concrete walls such as concrete shear walls with openings and concrete cylinders.

The construction steps of the horizontal layered composite coupling beam of the concrete wall include:

1. When the concrete wall is poured to the position where the horizontal layered composite coupling beam needs to be set, the sub-coupling beam of the lower layer is made first, including the formwork, the steel skeleton formed by the longitudinal reinforcement of the sub-coupling beam and the stirrup of the sub-coupling beam, and the pouring of concrete and other conventional construction steps;

2. Lay a horizontal isolation layer on the concrete upper surface of the sub-coupling beams on the lower floor. When the material of the horizontal isolation layer is aerated concrete or foam concrete blocks, the thickness shall be about 50mm, and the thickness shall be uniform;

3. Use the horizontal isolation layer as the bottom formwork to carry out the construction of the sub-coupling beams on the upper floor, including conventional construction steps such as supporting the formwork, setting the steel skeleton formed by the sub-coupling beam longitudinal bars and sub-coupling beam stirrups, and pouring concrete. The construction is completed After that, the horizontal layered composite coupling beam is formed.

Using the above-mentioned horizontal layered composite coupling beam, the function of the ordinary coupling beam with small span-to-height ratio designed according to the traditional method is replaced by the upper sub-coupling beam and the lower sub-coupling beam. The horizontal isolation layer is also used as the bottom formwork of the upper sub-coupling beam during construction, and it does not need to be taken out after the construction is completed. When encountering a strong earthquake, the connecting beams of the wall are deformed, and because the material strength of the horizontal isolation layer is much lower than the concrete strength of the wall (the former is generally only 1/20 of the latter), it is quickly crushed, making the upper and lower floors The coupling beam can be used as a coupling beam with a relatively large span height to be deformed separately, which is conducive to realizing the strong shear weak bending of the coupling beam design and the strong wall weak beam concept of the wall design, and improving the seismic performance.

The beneficial effects that can be obtained by the horizontal layered composite coupling beam of the concrete wall mainly include: solving the problem of poor seismic performance of the concrete wall with openings when the span-height ratio of the coupling beam is small; the horizontal isolation layer doubles as the bottom of the upper sub-coupling beam during construction The formwork can meet the rigidity requirements, and does not need to be dismantled, which is convenient for construction; economical and reasonable.

Due to the above-mentioned advantages, the present invention has a better application prospect for concrete walls with openings that are widely used in multi-storey and high-rise building structures.

Description of drawings

Fig. 1 is a longitudinal section schematic diagram of a horizontal layered composite coupling beam arranged on a concrete wall with an opening;

Fig. 2 is the A-A sectional view of Fig. 1;

In the figure: 1. Horizontal layered composite coupling beam, 2. Upper sub-coupling beam, 3. Lower sub-coupling beam, 4. Horizontal isolation layer, 5. Concrete wall wall, 6. Concrete wall opening, 7. Sub-coupling Coupling beam longitudinal reinforcement, 8, sub-coupling beam stirrups

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Example 1:

Figures 1 to 2 show the horizontally layered composite coupling beams set on concrete walls with openings. The horizontally layered composite connecting beam 1 includes an upper layer sub-connecting beam 2, a horizontal isolation layer 4 and a lower layer connecting beam 3, forming a composite cross-section form arranged horizontally. The beam width of the upper sub-coupling beam 2 and the lower sub-coupling beam 3 are the same as the thickness of the wall, equipped with sub-coupling beam longitudinal reinforcement 7 and sub-coupling beam stirrup 8, which are made of concrete, and the sub-coupling beam longitudinal reinforcement is anchored to the concrete at both ends In the body of the wall body 5 ; the horizontal isolation layer 4 is located between the upper surface of the sub-coupling beam 3 of the lower layer and the lower surface of the sub-coupling beam 2 of the upper layer, and is completely covered by aerated concrete.

The construction steps of the horizontal layered composite coupling beam 1 of the concrete wall include:

1. When the concrete wall is poured to the position where the horizontal layered composite coupling beam 1 needs to be set, the lower sub-coupling beam 3 is made first, including the supporting formwork, the reinforcement formed by setting the sub-coupling beam longitudinal reinforcement 7 and the sub-coupling beam stirrup 8 Regular construction steps such as skeleton and pouring concrete;

2. The upper surface of the sub-coupling beam 3 on the lower floor is completely covered with a horizontal isolation layer 4 using aerated concrete;

3. With the horizontal isolation layer 4 of aerated concrete as the bottom formwork, the construction of the upper sub-coupling beam 2 is completed, including the supporting formwork, the setting of the steel skeleton formed by the sub-coupling beam longitudinal reinforcement 7 and the sub-coupling beam stirrup 8, pouring Concrete and other conventional construction steps are used to form horizontal layered composite coupling beams 1 .

The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention; therefore, although the specification has described the present invention in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand , the present invention can still be modified or equivalently replaced; and all technical solutions and improvements that do not depart from the spirit and scope of the invention should be covered by the claims of the present invention.

Claims (3)

1. A horizontally layered composite coupling beam with a concrete wall with an opening, is characterized in that: it comprises an upper strata sub-coupling beam, a horizontal isolation layer and a lower floor sub-coupling beam, forming a composite cross-section form that the horizontal layering is set. The beam width of the upper sub-coupling beam and the lower sub-coupling beam are the same as the thickness of the wall, equipped with sub-coupling beam longitudinal reinforcement and sub-coupling beam stirrup, which are made of concrete, and the sub-coupling beam longitudinal reinforcement is anchored to the concrete wall at both ends Inside; the horizontal isolation layer is located between the upper surface of the sub-coupling beams of the lower layer and the lower surface of the sub-coupling beams of the upper layer, and is completely covered by isolation materials. The isolation material of the horizontal isolation layer is light and low-strength material, including aerated concrete, foam concrete or polystyrene board. 2. The horizontally layered composite connecting beam of a concrete wall with an opening according to claim 1, wherein the horizontally layered composite connecting beam can be used for concrete shear walls and concrete tubes with openings There are holes in various types of concrete walls such as concrete walls. 3. the construction method of the horizontal layered composite connecting beam of a kind of band hole concrete wall according to claim 1, is characterized in that: The construction steps of the horizontally layered composite connecting beam with a concrete wall with a hole include: 1) When the concrete wall is poured to the position where the horizontal layered composite coupling beam needs to be set, the sub-coupling beam of the lower layer is made first, including the formwork, the reinforcement skeleton formed by the longitudinal reinforcement of the sub-coupling beam and the stirrup of the sub-coupling beam, and the pouring of concrete and other conventional construction steps; 2) The concrete upper surface of the sub-coupling beams on the lower floor is completely covered with a horizontal isolation layer. When the material of the horizontal isolation layer is aerated concrete or foam concrete blocks, the thickness shall be uniform; 3) Use the horizontal isolation layer as the bottom formwork to carry out the construction of the sub-coupling beams on the upper floor, including conventional construction steps such as supporting formwork, setting the steel skeleton formed by the sub-coupling beam longitudinal bars and sub-coupling beam stirrups, and pouring concrete. The construction is completed After that, the horizontal layered composite coupling beam is formed.

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