CN109629709B

CN109629709B - Infilled wall applying pre-stress through building blocks with bolts and construction method

Info

Publication number: CN109629709B
Application number: CN201910035786.3A
Authority: CN
Inventors: 王晓敏; 公茂盛; 左占宣
Original assignee: Institute of Engineering Mechanics China Earthquake Administration
Current assignee: Institute of Engineering Mechanics China Earthquake Administration
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2021-04-06
Anticipated expiration: 2039-01-15
Also published as: CN109629709A

Abstract

A infilled wall applying pre-stress through building blocks with bolts and a construction method belong to the technical field of building structure earthquake resistance, and solve the problems existing in the traditional infilled wall; the method comprises the steps that building blocks with bolts are used for building when the uppermost building block is built, the upper surfaces of the building blocks with the bolts are provided with bolts in the vertical direction, after the building is completed, the bolts are screwed out by using a torque wrench, and the bolts are jacked on an upper beam of a frame to apply pre-stress; the invention is used for frame building structures.

Description

Infilled wall applying pre-stress through building blocks with bolts and construction method

Technical Field

The invention belongs to the technical field of building structure earthquake resistance, and particularly relates to a novel infilled wall applying a pre-compressive stress through building blocks with bolts and a construction method.

Background

Infill walls are common components in framed building structures, primarily for exterior envelope and interior partitions of the building structure. Traditional infilled wall ductility is relatively poor, and the bearing capacity is low, and under the effect of earthquake, when the main part frame structure has not taken place obvious damage often, infilled wall has taken place brittle failure and has collapsed even, causes a large amount of economic losses and casualties.

The characteristics of the traditional infilled wall are completely abandoned by some novel infilled walls which are proposed at present, but the novel infilled walls are difficult to popularize in actual engineering due to high construction cost, high construction difficulty and the like; although some improved infill walls maintain the characteristics of the traditional infill walls, the partial performance of the infill walls is usually sacrificed, and the shock resistance of the infill walls in and out of a plane is difficult to be improved simultaneously. The ideal infilled wall should be able to improve the deformability and bearing capacity of the infilled wall, while at the same time improving the collapse resistance of the infilled wall, while maintaining the advantageous characteristics of the traditional infilled wall. In fact, the stressed performance of the infill wall is influenced by two factors, namely the vertical load born by the infill wall and the effective connection between the infill wall and the peripheral frame, besides the material characteristics and the size parameters of the infill wall. Therefore, if the vertical load of the infilled wall can be improved, the effective connection between the wall body and the peripheral frame is enhanced, and the infilled wall has important practical significance in improving the stress performance and the collapse resistance of the infilled wall.

Disclosure of Invention

The invention aims to solve the problems of the traditional infilled wall, and provides a novel infilled wall applying a pre-compressive stress through a building block with a bolt and a construction method thereof, wherein the technical scheme is as follows:

the utility model provides a exert pre-stress's novel infilled wall through taking bolt building block, it contains takes the bolt building block, the superiors' building block of infilled wall is whole to be taken the bolt building block or the interval sets up and takes the bolt building block, and the bolt building block is the bolt that is provided with vertical direction at the upper surface of building block, can utilize torque wrench to back the bolt back of accomplishing piling out, makes the bolt top exert pre-stress on the frame upper beam as required.

The utility model provides a construction method of applying prestressing force's novel infilled wall through area bolt building block, it contains uses the area bolt building block to pile up when piling up the superiors' building block, and area bolt building block is provided with the bolt of vertical direction at the upper surface of building block, piles up the back of accomplishing, and the maintenance is twenty-eight days, treats that the wall body reaches standard strength, utilizes torque wrench to back out the bolt, with the bolt top in the frame upper beam applys prestressing force.

The invention has the beneficial effects that: the invention provides a method for improving the anti-collapse capability of a infilled wall frame structure, which can apply pre-stress to the infilled wall through the building blocks with bolts on the premise of not changing the traditional infilled wall building block material and the building mode, thereby strengthening the constraint between the infilled wall and the frame beam, improving the bearing capability and the anti-deformation capability of the infilled wall, limiting the development of wall cracks, and enhancing the out-of-plane anti-collapse capability of the infilled wall, so that the defects of poor ductility, low bearing capability, poor out-of-plane anti-collapse capability and the like of the traditional infilled wall are overcome, and the anti-seismic performance of the infilled wall frame structure is. The invention has the advantages of low construction difficulty, low requirement on constructors, no great increase of the manufacturing cost, and better economy and applicability.

Description of the drawings:

FIG. 1 is a schematic diagram of the structural principle of the present invention;

FIG. 2 is a schematic view of a bolted block;

fig. 3 is an exploded schematic view of fig. 2.

The specific implementation mode is as follows:

referring to fig. 1 to 3, a novel infilled wall applying a pre-compressive stress through a block with a bolt comprises a block with a bolt 1, wherein the uppermost block of the infilled wall is a block with a bolt 1 or a block with a bolt 1 is arranged at intervals, the block with a bolt 1 is a bolt 1-1 arranged in the vertical direction on the upper surface of the block, and the bolt 1-1 can be screwed out by using a torque wrench after the building is completed, so that the bolt 1-1 is supported on an upper beam of a frame to apply the pre-compressive stress as required.

A construction method of a novel infilled wall applying pre-stress through a block with a bolt comprises the steps of piling the block with the bolt 1 when the uppermost layer of block is piled, arranging the bolt 1-1 in the vertical direction on the upper surface of the block with the bolt 1, maintaining for twenty-eight days after piling is completed, screwing out the bolt 1-1 by using a torque wrench when the wall body reaches standard strength, and applying pre-stress on the upper beam of a frame by propping the bolt 1-1.

In the first concrete implementation mode, the building block 1 with the bolt comprises a building block, an internal thread steel bushing 2 and a bolt 1-1, wherein the internal thread steel bushing 2 is pre-embedded in the building block, and the bolt 1-1 with matched threads is arranged in the internal thread steel bushing 2; the block is preferably made of lightweight concrete to reduce weight and to make it closer to conventional hollow bricks 3.

In the second embodiment, each block 1 with bolts is provided with two bolts 1-1, and for the requirement of staggered joint, half bricks are used according to the conventional technical means, namely one half of one block 1 with bolts, and one bolt 1-1 is arranged on the half brick.

In the third embodiment, the outer surface of the internally threaded steel sleeve 2 is a rough surface.

In the fourth concrete implementation mode, a transverse rib 2-1 or a reinforcement cage is arranged on the outer side of the inner threaded steel sleeve 2 to strengthen the binding force with the building block 1.

In the fifth embodiment, other blocks except the uppermost layer are common blocks such as hollow bricks 3 according to a common technical means.

In the concrete implementation mode six, in the stacking process, one horizontal tie bar 4 is laid in a horizontal mortar joint for every two or three layers of building blocks, the horizontal tie bar 4 is connected with a preset tie bar at the column side, and the preset tie bar needs to be pre-embedded in the frame construction process; according to the conventional technical means, the mortar is paved on the web plate of the hollow brick 3 before the horizontal tie bars 4 are paved so as to ensure the fit between the tie bars and the web plate; in order to solve the problem that the height of a preset tie bar extending out of the column side is inconsistent with the height of a horizontal mortar joint, a notch is formed in a block web plate at a required position according to a conventional technical means, so that the thickness of the horizontal mortar joint can be ensured to be consistent.

In the seventh embodiment, the pre-stress value applied to the upper part of the door opening and the window opening should be properly reduced to prevent the door and the window below the opening from being damaged.

It should be pointed out that the frame of the invention is not limited to reinforced concrete frame, and all frame structures needing to build the filler wall can adopt the novel filler wall provided by the invention to improve the anti-seismic performance.

Claims

1. The filled wall applying the pre-stress through the building blocks with the bolts is characterized by comprising the building blocks (1) with the bolts, wherein the building blocks at the uppermost layer of the filled wall are all the building blocks (1) with the bolts or the building blocks (1) with the bolts are arranged at intervals, and the upper surfaces of the building blocks are provided with the bolts (1-1) in the vertical direction; the building block (1) with the bolt comprises a building block, an internal thread steel sleeve (2) and a bolt (1-1), the internal thread steel sleeve (2) is pre-embedded in the building block, the bolt (1-1) matched with the thread is arranged in the internal thread steel sleeve (2), the bolt (1-1) is screwed out, and the pre-compression stress is applied to the frame beam in a propping mode.

2. A filler wall for applying a pre-compressive stress through a block with a bolt as claimed in claim 1, wherein a lateral reinforcement (2-1) or a reinforcement cage is provided outside the internally threaded steel jacket (2).

3. A filler wall for applying a pre-compressive stress through a block with a bolt as claimed in claim 1, wherein the blocks other than the uppermost block are hollow blocks (3).

4. A construction method of a filler wall applying pre-stress through a block with a bolt comprises the steps of piling the block with the bolt (1) when the uppermost layer of the block is piled, wherein the block with the bolt (1) is provided with a bolt (1-1) in the vertical direction on the upper surface of the block, the block with the bolt (1) comprises the block, an internal thread steel sleeve (2) and a bolt (1-1), the internal thread steel sleeve (2) is pre-embedded in the block, the bolt (1-1) matched with the thread is arranged in the internal thread steel sleeve (2), after the piling is completed, the wall body reaches standard strength, the bolt (1-1) is screwed out through a torque wrench, and the bolt (1-1) is jacked on a frame beam to apply the pre-stress.

5. A method of constructing a infill wall by applying pre-stressing forces through bolted blocks according to claim 4, wherein during the course of laying, a horizontal tie (4) is laid in the horizontal joint between two or three courses of blocks.