CN103061408B - Powerful confined concrete core wall with obvious columns and hidden beams - Google Patents

Abstract

The invention relates to a strongly constrained concrete core tube provided with open columns and hidden beams, belongs to the field of civil engineering, and is mainly used in construction engineering. The exposed column and hidden beam strongly restrain the concrete core tube, including the concrete wall, the concrete frame column and the hidden beam in the concrete wall. Concrete walls are equipped with horizontally distributed steel bars and vertically distributed steel bars; concrete frame columns are set at the intersection of concrete walls at each corner of the core tube, which are exposed columns protruding from the wall; hidden beams in the wall are set on each floor At the height, there are longitudinal bars and stirrups, which extend along the horizontal length of the wall and connect with the concrete frame columns at both ends to form a space-constrained frame. Steel columns are set in the concrete frame columns and the edge components of the wall openings, and steel beams are set in the concealed beams. The steel beams and steel columns are rigidly connected to form the steel skeleton inside the concrete cylinder. The strong-constrained concrete core tube with exposed columns and hidden beams proposed by the invention has good seismic performance and can be popularized and used in high-rise concrete structure buildings.

Description

A strong confinement concrete core tube with open columns and hidden beams

technical field

The invention relates to a strongly constrained concrete core tube provided with open columns and hidden beams, belongs to the field of civil engineering, and is mainly used in construction engineering.

Background technique

In recent years, the rapid development of my country's economy and society has led to the construction of a large number of high-rise buildings, whose scale and height continue to increase, and the structural system is becoming more and more diverse. Due to its high rigidity, the concrete core tube is widely used in various high-rise building structural systems, and becomes the main body of the structure's lateral stiffness. Therefore, the performance of the core tube is directly related to the performance of the overall structure. For high-rise buildings with anti-seismic requirements, the core tube becomes the first line of defense and key components for anti-seismic fortification. However, the ordinary concrete core tube has deficiencies in seismic performance, which is manifested in that while the core tube bears most of the horizontal seismic action of the structure due to its high stiffness, the brittle nature of the concrete material itself makes it easy to be damaged quickly, resulting in its horizontal The bearing capacity drops rapidly and the deformation performance is poor, thus affecting the seismic safety of the core tube and even the entire structure. In view of this situation, the present invention intends to form a strongly constrained core tube by adopting the measures of arranging concrete frame exposed columns and hidden beams for the concrete core tube, effectively improving the horizontal bearing capacity, deformation and energy dissipation capacity of the tube body, especially improving its Late performance, in order to facilitate earthquake resistance.

Contents of the invention

The object of the present invention is to provide a concrete core tube with strong restraint of exposed columns and hidden beams with good seismic performance.

The present invention adopts following technical scheme:

The invention proposes a strongly constrained concrete core tube with exposed columns and hidden beams, which includes concrete walls, concrete frame columns and hidden beams in the concrete walls; Distribute steel bars; the concrete frame column is set at the intersection of concrete walls in two directions at the corner of the core tube, and the horizontal section size of the concrete frame column is greater than the thickness of the adjacent concrete walls along the thickness direction of the wall. A rectangular or L-shaped cross-section exposed column protruding from the wall is formed. Longitudinal bars and stirrups are arranged inside the concrete frame column, and the horizontally distributed steel bars in the concrete wall extend into the concrete frame column for anchoring; The concealed beams are arranged at the place, and the width of the concealed beams is the same as the thickness of the concrete wall; the concealed beams extend along the horizontal length direction of the concrete wall in the length direction, and are finally connected with the concrete frame columns at both ends. For the wall with door and window openings at the floor, the height of the concealed beam shall be taken as the height of the connecting beams of the opening of the wall. The top and bottom of the concealed beam are configured with long longitudinal reinforcements extending into the frame column for anchoring, and stirrups are arranged along the entire length of the concealed beam. Concrete frame columns and concealed beams in the concrete walls form a space-constrained framework integrated with the pouring of the concrete walls.

A steel column penetrating along the height direction of the cylinder is set in the concrete frame column and the edge member of the wall opening, and a steel beam penetrating along the length direction of the beam is set near the middle of the cross-section of the concealed beam in the concrete wall , steel beams and steel columns are rigidly connected to form a space steel skeleton inside the concrete cylinder.

The steel beams and columns are steel members with rolled sections or steel sections with welded sections.

Compared with the common reinforced concrete core tube, the present invention has the following advantages:

In the normal use stage, the cylinder has high rigidity and small deformation; under strong earthquake action, due to the restraint effect of the space frame composed of frame columns and concealed beams and the direct reinforcement of the corners of the cylinder, the horizontal bearing capacity and deformation of the cylinder will be reduced. The capacity is improved, the failure is delayed, especially its later performance is effectively improved, the concrete at the bottom of the cylinder is prevented from being crushed prematurely, and the energy dissipation mechanism of the plastic hinge at the end of the coupling beam and other parts can be fully realized. When there is a space steel skeleton formed by steel beams and steel columns inside the cylinder, the steel skeleton can work together with the concrete that has begun to enter the destruction stage, so that the cylinder itself, which is the key component of the system, forms a later-stage resistance system. Therefore, the strong confinement concrete core tube with exposed columns and hidden beams proposed by the present invention can achieve obvious effects in improving the seismic performance of the concrete core tube, and greatly improve the seismic safety of the structural system.

Description of drawings

Fig. 1 is a schematic plan view of a concrete core tube with exposed columns and concealed beams with a rectangular frame column cross-section;

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

Fig. 3 is the B-B sectional view of Fig. 1;

Fig. 4 is a schematic plan view of a concrete core tube with exposed columns and concealed beams with an L-shaped cross section of frame columns;

Fig. 5 is the A-A sectional view of Fig. 4;

Fig. 6 is the B-B sectional view of Fig. 4;

In the figure: 1. Concrete wall, 2. Concrete border column, 3. Concealed beam in the concrete wall, 4. Steel column, 5. Steel beam, 6. Connecting beam of the wall opening, 7. Edge member of the wall opening , 8. Horizontal distribution of steel bars on the wall, 9. Vertical distribution of steel bars on the wall, 10. Longitudinal bars of concrete frame columns, 11. Stirrups of concrete frame columns, 12. Longitudinal bars of hidden beams in walls, 13. Stirrups of hidden beams in walls Tendons, 14, door and window openings.

Detailed ways

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

Example 1:

Figures 1 to 3 show the frame-column cross-section of a rectangular concrete core tube with exposed columns and concealed beams. The core tube is composed of concrete walls 1, concrete frame columns 2 and hidden beams 3 in the concrete walls. In the concrete wall 1, the horizontally distributed steel bars 8 and the vertically distributed steel bars 9 of the wall are configured according to conventional methods; the concrete frame columns 2 are arranged at the intersection of the concrete wall 1 in two directions at each corner of the core tube, and the concrete frame columns The horizontal cross-sectional dimensions of 2 are respectively greater than the thickness of the adjacent concrete walls 1 in the thickness direction, forming a rectangular cross-section exposed column protruding from the wall, and the concrete frame column 2 is equipped with concrete frame column longitudinal reinforcement 10 And the concrete frame column stirrup 11, the wall horizontally distributed reinforcement 8 stretches into the concrete frame column 2, and is reliably anchored; the hidden beam 3 in the concrete wall is set at each floor height in the concrete wall 1, and the hidden beam 3 in the concrete wall The width of 3 is the same as the thickness of the concrete wall 1; the hidden beam 3 in the concrete wall extends along the horizontal length direction of the concrete wall 1 in the length direction, and finally connects with the concrete frame columns 2 at both ends respectively. For being provided with the concrete body of wall 1 of door and window hole 14, the height of concealed beam 3 in the body of concrete wall should get the height of connecting beam 6 of body of wall hole. The top and bottom of the hidden beam 3 in the concrete wall are configured with the longitudinal reinforcement 12 of the hidden beam 3 extending into the concrete frame column 2 for reliable anchoring, and the hidden beam hoops of the wall are arranged along the entire length of the hidden beam 3 in the concrete wall Tendon13. The concrete frame column 2 and the concealed beam 3 in the concrete wall form a space-constrained frame integrated with the pouring of the concrete wall 1 . The above-mentioned concrete frame column 2 and the edge member 7 of the wall opening are provided with a steel column 4 penetrating along the height direction of the cylinder, and the position near the middle of the cross section of the hidden beam 3 in the above-mentioned concrete wall is provided with a steel beam 5 penetrating along the beam length direction , the steel beam 5 and the steel column 4 are rigidly connected to form a space steel skeleton inside the concrete cylinder.

Example 2:

Figures 4 to 5 show the frame-column cross-section of the L-shaped strong-constrained concrete core tube with exposed columns and hidden beams. The core tube is composed of concrete walls 1, concrete frame columns 2 and hidden beams 3 in the concrete walls. In the concrete wall 1, the horizontally distributed steel bars 8 and the vertically distributed steel bars 9 of the wall are configured according to conventional methods; the concrete frame columns 2 are arranged at the intersection of the concrete wall 1 in two directions at each corner of the core tube, and the concrete frame columns The horizontal cross-sectional dimensions of 2 are respectively greater than the thickness of the adjacent concrete walls 1 along the thickness direction, forming an L-shaped cross-sectional exposed column that protrudes from the wall surface and has an inner concave angle. The concrete frame column 2 is equipped with concrete Frame column longitudinal reinforcement 10 and concrete frame column stirrup 11, wall horizontally distributed reinforcement 8 extends into concrete frame column 2 for reliable anchorage; concrete wall 1 is provided with concealed beams 3 in the concrete wall at the height of each floor, concrete wall The width of the concealed beam 3 in the body is the same as the thickness of the concrete wall 1; the concealed beam 3 in the concrete wall extends along the horizontal length direction of the concrete wall 1 in the length direction, and finally connects with the concrete frame columns 2 at both ends respectively. For being provided with the concrete body of wall 1 of door and window hole 14, the height of concealed beam 3 in the body of concrete wall should get the height of connecting beam 6 of body of wall hole. The top and bottom of the hidden beam 3 in the concrete wall are configured with the longitudinal reinforcement 12 of the hidden beam 3 extending into the concrete frame column 2 for reliable anchoring, and the hidden beam hoops of the wall are arranged along the entire length of the hidden beam 3 in the concrete wall Tendon13. The concrete frame column 2 and the concealed beam 3 in the concrete wall form a space-constrained frame integrated with the pouring of the concrete wall 1 . The above-mentioned concrete frame column 2 and the edge member 7 of the wall opening are provided with a steel column 4 penetrating along the height direction of the cylinder, and the position near the middle of the cross section of the hidden beam 3 in the above-mentioned concrete wall is provided with a steel beam 5 penetrating along the beam length direction , the steel beam 5 and the steel column 4 are rigidly connected to form a space steel skeleton inside the concrete cylinder.

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 strong confinement concrete core tube with exposed columns and hidden beams is characterized in that: it includes concrete walls, concrete frame columns and hidden beams in the concrete walls; the horizontal distribution of the walls is configured in the concrete walls Steel bars and walls are vertically distributed; concrete frame columns are set at the intersection of concrete walls in two directions at the corner of the core tube, and the horizontal section size of the concrete frame columns is uniform along the thickness direction of the adjacent concrete walls. Respectively greater than the thickness of the wall to form a rectangular or L-shaped cross-section exposed column protruding from the wall. The concrete frame column is equipped with a concrete frame column longitudinal reinforcement and a concrete frame column stirrup. The horizontally distributed steel bars in the concrete wall extend into the Anchor to the concrete frame column; set the hidden beam in the concrete wall at the height of each floor in the concrete wall, the width of the hidden beam is the same as the thickness of the concrete wall; the hidden beam extends along the horizontal length direction of the concrete wall in the length direction , and finally connected to the concrete frame columns at both ends; for a wall with door and window openings at the floor, the height of the hidden beam in the concrete wall is taken as the height of the connecting beam of the wall opening; the configuration of the top and bottom surfaces of the hidden beam in the concrete wall The longitudinal reinforcement of the hidden beam of the full-length wall extends into the frame column for anchoring, and the hidden beam stirrup of the wall is arranged along the full length of the hidden beam in the concrete wall; the concrete frame column and the hidden beam in the concrete wall are formed with the concrete The wall is poured as an overall space-constrained frame. 2. A strongly constrained concrete core tube with exposed columns and hidden beams according to claim 1, characterized in that: the steel frame penetrating along the height direction of the cylinder is arranged in the concrete frame column and in the edge member of the wall opening. For the column, a steel beam penetrating along the length direction of the beam is set near the middle of the cross-section of the concealed beam in the concrete wall, and the steel beam and the steel column are rigidly connected to form a space steel skeleton inside the concrete cylinder. 3. The strongly constrained concrete core tube with exposed columns and hidden beams according to claim 2, characterized in that: the steel beams and steel columns are made of rolled section steel members or welded section steel members.