A masonry filling wall with precompression stress and construction method thereof

Abstract

A masonry infill wall with prestress and a construction method thereof, relating to an infill wall and a construction method. The infill wall is built inside the frame beam column, two adjacent layers of blocks are staggered, a plurality of steel wire ropes are arranged horizontally and vertically to form a steel mesh and are arranged inside the infill wall, one end of each steel wire rope is fixed inside the frame beam column as a pre-embedded end, a screw is arranged at the other end and a nut is screwed on as a compression end to apply pre-stress, and the steel wire rope is arranged at the mortar joint position. During construction, the pre-embedded position is marked to fix the steel wire rope, and the blocks are laid layer by layer from bottom to top. The blocks that need to pass through some areas of the steel wire rope are punched, and the nuts are tightened to apply pre-stress after the masonry is completed and the strength of the mortar reaches the specified value. A steel mesh is formed by arranging steel wire ropes inside the infill wall, one end of which is pre-embedded in the frame beam column, and a screw and nut are arranged at the other end to apply pre-stress, thereby enhancing seismic resistance and safety, and having good economy and applicability.

Description

Technical Field

[0001] The invention relates to a filling wall and a construction method, in particular to a masonry filling wall with pre-compression stress and a construction method thereof, belonging to the technical field of earthquake resistance of building structures. Background Art

[0002] Up to now, earthquake disasters are still one of the natural disasters that pose the greatest threat to housing safety. Studies have shown that in earthquakes, the main load-bearing components often do not suffer serious damage, but the filling walls that serve as non-load-bearing walls develop X-shaped cracks due to shear failure and collapse as a whole.

[0003] Although the infill wall is not a structural component, the cracks in the earthquake damage are only minor. However, if the damage is serious and the whole wall collapses, it may block the escape route and increase the difficulty of rescue. The masonry fragments produced by the collapse will also threaten the safety of personnel, causing great economic losses and casualties. Even if the infill wall does not collapse in the earthquake, the small cracks caused by the earthquake will affect its service life, and the repair of these cracks in the infill wall is also a considerable expense.

[0004] Therefore, if it is possible to increase the out-of-plane stiffness of the infill wall while reducing the falling of blocks when the infill wall collapses due to an earthquake, it will be of great significance for the seismic design of the infill wall. Summary of the invention

[0005] In order to solve the shortcomings of the background technology, the present invention provides a masonry infill wall with pre-stressed structure and a construction method thereof. A steel wire mesh with a grid structure is formed by arranging steel wire ropes inside the infill wall, one end of which is pre-buried in the frame beam column, and a screw and nut are arranged at the other end to apply pre-stressed structure, thereby enhancing its seismic resistance and safety, and having good economy and applicability.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A masonry infill wall with prestressed stress comprises a frame beam column formed by an upper beam, a lower beam and columns on both sides in a rectangular shape, and a infill wall formed by a plurality of blocks combined with mortar inside the frame beam column, wherein the blocks are staggered between each two adjacent layers of the infill wall, and the infill wall comprises two structures: a wall without holes and a wall with holes, and the wall with holes is divided into two forms: a wall with door holes and a wall with window holes, and the masonry infill wall also comprises a steel wire mesh formed by a plurality of steel wire ropes arranged crosswise in a horizontal and vertical direction, the steel wire mesh is arranged inside the infill wall, one end of each of the steel wire ropes is used to be fixed inside a corresponding position of the frame beam column as a pre-embedded end, and the other end is fixedly provided with a screw rod and is screwed and matched with a nut as a clamping end, and prestressed stress is applied to the infill wall by tightening the nut to clamp the corresponding blocks, and the steel wire ropes arranged horizontally and vertically in the steel wire mesh are all arranged at the mortar joint positions corresponding to the infill wall.

[0008] A construction method for a masonry infill wall with pre-compression stress, comprising the following steps:

[0009] Step 1: Tie the steel bars and support the formwork according to the frame beams and columns in advance, mark the embedded positions according to the actual construction situation and insert the embedded ends of the fixed steel wire ropes, then pour the concrete and perform curing to complete the construction of the frame beams and columns;

[0010] Step 2: After the frame beams and columns reach the strength standard, the formwork is removed and the blocks are laid layer by layer from the lower beam to the upper beam;

[0011] Step 3: For walls without holes, all the embedded ends of the horizontally arranged steel wire ropes are embedded and fixed with the lower beams. During the layer-by-layer masonry process, the horizontally arranged steel wire ropes are clamped in the vertical mortar joints. Due to the staggered joints of the two adjacent layers of blocks, some areas of the horizontally arranged steel wire ropes need to pass through the corresponding blocks. Such blocks need to be marked with the passing position in advance and drilled. All the embedded ends of the longitudinally arranged steel wire ropes are embedded and fixed with the columns on one side. During the masonry process, they are gradually clamped in the horizontal mortar joints. After all the blocks are completed and the strength of the mortar reaches the specified value, pre-compression stress is applied to the filling wall by tightening the nuts at the compression ends of the steel wire ropes. The screw is against the corresponding position of the frame beam and column. For the wall with door openings, the steel wire rope in the area overlapping with the door opening is arranged in an inverted T shape along the door opening frame, so that its embedded ends are respectively embedded and fixed with the corresponding upper beam and two side columns, and its clamping end applies pre-compression stress to the door opening frame by tightening the nut. The construction of the remaining steel wire ropes is the same as that of the wall without openings. For the wall with window openings, the steel wire rope in the area overlapping with the window opening is arranged in a cross shape along the window opening frame, so that its embedded ends are respectively embedded and fixed with the corresponding upper beam, lower beam and two side columns, and its clamping end applies pre-compression stress to the window opening frame by tightening the nut. The construction of the remaining steel wire ropes is the same as that of the wall without openings.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention arranges steel wire ropes inside the filling wall to form a steel wire mesh with a grid structure, one end of the steel wire rope is pre-buried in the frame beam column to increase the connection capacity between the filling wall and the frame beam column, a screw is set at the other end of the steel wire rope to rest on the frame beam column, and the screw and nut are used together to compress the blocks to apply pre-compression stress to the filling wall, which helps to improve the bearing capacity, deformation resistance and out-of-plane stiffness of the filling wall, thereby enhancing its seismic resistance, so that the filling wall can withstand a large load and show good ductility characteristics in an earthquake, ensuring that it does not suffer from large-scale collapse and falling fragments to injure people, thereby increasing the safety of the filling wall, and the present invention has great similarities with the structure and masonry method of the traditional filling wall, the added steel wire rope and screw nut have little effect on the cost, and the construction personnel only need to understand the assembly method of the steel wire rope to master it, with good economy and applicability, which is conducive to promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the masonry filling wall of the present invention for a wall state without a hole;

[0014] Figure 2 It is a structural schematic diagram of the masonry filling wall of the present invention for the wall state of the door opening;

[0015] Figure 3 It is a structural schematic diagram of the masonry filling wall of the present invention for the state of the wall with a window opening;

[0016] Figure 4 It is a schematic diagram of the compression end structure of the steel wire rope used in the masonry filling wall of the present invention. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] like Figure 1 to Figure 4As shown, a masonry infill wall with prestressing stress comprises a frame beam column formed by an upper beam 1, a lower beam 2 and two side columns 3 in a rectangular shape, and a infill wall formed by a plurality of blocks 4 combined with mortar inside the frame beam column, and the blocks 4 of each adjacent layer in the infill wall are staggered, the infill wall comprises two structures: a wall without holes and a wall with holes, and the wall with holes is divided into two forms: a wall with door holes and a wall with window holes, the masonry infill wall also comprises a steel wire mesh formed by a plurality of steel wire ropes 5 arranged crosswise in a horizontal and vertical direction, the steel wire mesh is arranged inside the infill wall, one end of each of the steel wire ropes 5 is used to be fixed inside the corresponding position of the frame beam column as an embedded end, and the other end is fixedly provided with a screw rod 6 and is screwed with a nut 7 as a clamping end, and the prestressing stress is applied to the infill wall by tightening the nut 7 to clamp the corresponding block 4, and the steel wire ropes 5 arranged horizontally and vertically in the steel wire mesh are arranged at the corresponding mortar joint positions of the infill wall.

[0019] Combination Figure 1 As shown, for the wall without holes, the embedded ends of all the transversely arranged steel wire ropes 5 in the steel wire mesh are embedded and fixed with the lower beam 2, and the screws 6 at their clamping ends are all against the bottom of the upper beam 1, and the embedded ends of all the longitudinally arranged steel wire ropes 5 in the steel wire mesh are embedded and fixed with the column 3 on one side, and the screws 6 at their clamping ends are all against the side wall of the column 3 on the other side.

[0020] Combination Figure 2 As shown, for the door opening wall, the steel wire rope 5 in the area overlapping with the door opening in the steel mesh is arranged in an inverted T shape along the door opening frame, and its embedded ends are respectively embedded and fixed with the corresponding upper beam 1 and the columns 3 on both sides, and its clamping end applies pre-compression stress to the door opening frame through the nut 7, and the embedded ends of the remaining transversely arranged steel wire ropes 5 are all embedded and fixed with the lower beam 2, and the screws 6 at their clamping ends are all against the bottom of the upper beam 1, and the embedded ends of the remaining longitudinally arranged steel wire ropes 5 are all embedded and fixed with the column 3 on one side, and the screws 6 at their clamping ends are all against the side wall of the column 3 on the other side.

[0021] Combination Figure 3 As shown, for the wall with window openings, the steel wire ropes 5 in the steel wire mesh that overlap with the window openings are arranged in a cross shape along the window opening frame, and their embedded ends are respectively embedded and fixed with the corresponding upper beam 1, lower beam 2 and two side columns 3, and their clamping ends apply pre-compression stress to the window opening frame through nuts 7, and the embedded ends of the remaining transversely arranged steel wire ropes 5 are all embedded and fixed with the lower beam 2, and the screws 6 at their clamping ends are all against the bottom of the upper beam 1, and the embedded ends of the remaining longitudinally arranged steel wire ropes 5 are all embedded and fixed with one side column 3, and the screws 6 at their clamping ends are all against the side wall of the other side column 3.

[0022] like Figure 1 to Figure 4 As shown, a construction method of a masonry infill wall with pre-compressive stress includes the following steps:

[0023] Step 1: Tie the steel bars and support the formwork in advance according to the frame beams and columns, mark the embedded position according to the actual construction situation and insert the embedded end of the fixed steel wire rope 5, then pour the concrete and perform curing to complete the construction of the frame beams and columns;

[0024] Step 2: After the frame beams and columns reach the strength standard, the formwork is removed, and the blocks 4 are laid layer by layer from the lower beam 2 to the upper beam 1;

[0025] Step 3: For walls without holes, all the embedded ends of the horizontally arranged steel wire ropes 5 are embedded and fixed with the lower beams 2. During the layer-by-layer masonry process, the horizontally arranged steel wire ropes 5 are clamped in the vertical mortar joints. Due to the staggered setting of the two adjacent layers of blocks 4, part of the horizontally arranged steel wire ropes 5 need to pass through the corresponding blocks 4. Such blocks 4 need to be marked with the passing position in advance and punched. All the embedded ends of the longitudinally arranged steel wire ropes 5 are embedded and fixed with the columns 3 on one side. During the masonry process, they are gradually clamped in the horizontal mortar joints. After all the blocks 4 are completed and the strength of the mortar reaches the specified value, pre-compression stress is applied to the filling wall by tightening the nuts 7 at the compression ends of the steel wire ropes 5. The screw rod 6 is against the corresponding position of the frame beam column. For the wall with door openings, the steel wire rope 5 in the area overlapping with the door opening is arranged in an inverted T shape along the door opening frame so that its embedded ends are respectively embedded and fixed with the corresponding upper beam 1 and the columns 3 on both sides, and its clamping end applies pre-compression stress to the door opening frame by tightening the nut 7. The construction method of the remaining steel wire ropes 5 is the same as that of the wall without openings. For the wall with window openings, the steel wire rope 5 in the area overlapping with the window opening is arranged in a cross shape along the window opening frame so that its embedded ends are respectively embedded and fixed with the corresponding upper beam 1, lower beam 2 and the columns 3 on both sides, and its clamping end applies pre-compression stress to the window opening frame by tightening the nut 7. The construction method of the remaining steel wire ropes 5 is the same as that of the wall without openings.

[0026] Furthermore, the number of layers of wire mesh is not limited to a single layer. It is preferred to use the wire rope 5 to arrange two layers of wire mesh in the thickness direction of the filling wall, and the interval between the two layers of wire mesh is determined according to the actual construction situation. In addition, in order to facilitate the screw rod 6 to be able to stably rest on the frame beam column, the wire rope 5 and the screw rod 6 should be fixed in a post-fixed form. Specifically, a ring for the wire rope 5 to pass through is provided at the connecting end of the screw rod 6. By passing the end of the wire rope 5 through the ring and then welding it to position it, it is helpful to adjust the final position of the screw rod 6. It is worth noting that the pre-compression stress applied to the top of the door opening and window opening should be appropriately reduced compared to other positions to prevent damage to the doors and windows installed later.

[0027] It should be pointed out that the present invention is described with reference to the frame beams and columns of the reinforced concrete structure. However, in actual construction, the frame beams and columns are not limited to the reinforced concrete structure. The frame beams and columns of other structural forms can also be constructed by fixing the steel wire rope 5 and then laying the blocks 4, thereby achieving the purpose of the present invention, and should also fall within the protection scope of the present invention.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms of assembly without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A masonry infill wall with prestressed pressure, comprising a frame beam column formed by an upper beam (1), a lower beam (2) and two side columns (3) in a rectangular shape, and an infill wall formed by a plurality of blocks (4) combined with mortar inside the frame beam column, wherein the blocks (4) are arranged in staggered joints between each two adjacent layers in the infill wall, the infill wall comprising two structures: a wall without holes and a wall with holes, wherein the wall with holes is divided into two forms: a wall with door holes and a wall with window holes, and characterized in that: The masonry infill wall also includes a steel wire mesh formed by a plurality of steel wire ropes (5) arranged crosswise in a horizontal and vertical direction. The steel wire mesh is arranged inside the infill wall. One end of each of the steel wire ropes (5) is used to be fixed inside a corresponding position of a frame beam column as a pre-embedded end, and the other end is fixedly provided with a screw rod (6) and screwed with a nut (7) as a pressing end. By tightening the nut (7) to press the corresponding masonry block (4), a pre-compression stress is applied to the infill wall. The steel wire ropes (5) arranged crosswise and crosswise in the steel wire mesh are arranged at the corresponding mortar joint positions of the infill wall. The construction method comprises the following steps: Step 1: Tie the steel bars and support the formwork in advance according to the frame beams and columns, mark the embedded positions according to the actual construction situation and insert the embedded ends of the fixed steel wire ropes (5), then pour concrete and perform curing to complete the construction of the frame beams and columns; Step 2: After the frame beams and columns reach the strength standard, the formwork is removed, and the blocks (4) are laid layer by layer from the lower beam (2) to the upper beam (1); Step 3: For a wall without a hole, all the embedded ends of the horizontally arranged steel wire ropes (5) are embedded and fixed with the lower beam (2). During the layer-by-layer masonry process, the horizontally arranged steel wire ropes (5) are clamped in the vertical mortar joints. Due to the staggered joints of the two adjacent layers of masonry blocks (4), part of the horizontally arranged steel wire ropes (5) need to pass through the corresponding masonry blocks (4). Such masonry blocks (4) need to be marked with the passing position in advance and punched. All the embedded ends of the longitudinally arranged steel wire ropes (5) are embedded and fixed with the columns (3) on one side. During the masonry process, they are gradually clamped in the horizontal mortar joints. After all the masonry blocks (4) are completed and the strength of the mortar reaches the specified value, the pre-compression stress is applied to the filling wall by tightening the nuts (7) at the compression ends of the steel wire ropes (5). The screw rod (6) is against the corresponding position of the frame beam column. For a wall with a door opening, the steel wire rope (5) in the area overlapping with the door opening is arranged in an inverted T shape along the door opening frame so that its embedded ends are respectively embedded and fixed with the corresponding upper beam (1) and the two side columns (3). Its clamping end applies pre-compression stress to the door opening frame by tightening the nut (7). The construction method of the remaining steel wire ropes (5) is the same as that of a wall without a hole. For a wall with a window opening, the steel wire rope (5) in the area overlapping with the window opening is arranged in a cross shape along the window opening frame so that its embedded ends are respectively embedded and fixed with the corresponding upper beam (1), lower beam (2) and two side columns (3). Its clamping end applies pre-compression stress to the window opening frame by tightening the nut (7). The construction method of the remaining steel wire ropes (5) is the same as that of a wall without a hole.

2. The masonry infill wall with precompression stress according to claim 1, characterized in that: The steel wire ropes (5) are arranged in the thickness direction of the filling wall to form two layers of steel wire mesh.

3. The masonry infill wall with precompression stress according to claim 1, characterized in that: The connecting end of the screw rod (6) is provided with a circular ring for the steel wire rope (5) to pass through, and the final position of the screw rod (6) can be adjusted by passing the end of the steel wire rope (5) through the circular ring and then welding it into position.

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