CN-122014015-A - Composite bandage device and reinforcing method suitable for preventive protection of historical building wood beams

CN122014015ACN 122014015 ACN122014015 ACN 122014015ACN-122014015-A

Abstract

The invention discloses a composite bandage device and a reinforcing method suitable for preventive protection of a wood beam of a historical building, wherein the device comprises a beam end enclosing hoop, at least one beam bottom longitudinal bandage, at least one top supporting cushion block, a hoop bandage and a hoop bandage, wherein the beam end enclosing hoop is arranged at the end of the wood beam and is used for forming enclosing constraint on the end of the wood beam, the at least one beam bottom longitudinal bandage is arranged along the span direction of the wood beam, the beam bottom longitudinal bandage is connected with the bottom connecting pieces of the beam ends enclosing hoop at the two ends of the wood beam in a closure mode, the head and the tail are connected with each other through a first connecting lock to form a closed loop and are tensioned, the at least one top supporting cushion block is inserted into the beam bottom longitudinal bandage and is used for supporting the beam bottom and supporting the beam bottom longitudinal bandage to form secondary tensioning, and the hoop bandage is arranged at the position corresponding to the top supporting cushion block and is wound around the wood beam and the periphery of the top supporting cushion block in a circumferential direction. The device has the characteristics of low cost, convenient construction, convenient disassembly, relatively small influence on the actual appearance of the wood beam and the like, and is suitable for preventive protection of a large number of wood beams without obvious damage in the structure of the historical building brick wood masonry.

Inventors

FANG LIXIN
SUN XUN
LI JIAN
ZHOU XINYU
DU LEI
YUAN JINGJING
SUN ZHONGXIU

Assignees

东南大学建筑设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260227

Claims (9)

1. A composite bandage device suitable for preventive protection of historic building timber beams, comprising: the beam end is enclosed with a hoop which is arranged at the end part of the wood beam and is used for forming enclosing constraint on the end part of the wood beam; At least one longitudinal beam bottom bandage arranged along the span direction of the wood beam, wherein the longitudinal beam bottom bandage is closed after encircling the bottom connecting pieces of the hoops around the beam ends at the two ends of the wood beam, and the head and the tail are connected by a first connecting lock to form a closed loop and are tensioned; At least one hoop bandage is wound around the wood beam in a circumferential direction and is tensioned on the outer periphery of the longitudinal bandage at the bottom of the beam; The gear shaping type adjustable elastic jacking cushion block is arranged at the position corresponding to the position of the hoop bandage, embedded between the hoop bandage and the lower edge of the wood beam, and a slot for the longitudinal bandage at the bottom of the beam to pass through is formed in the gear shaping type adjustable elastic jacking cushion block.
2. The composite bandage apparatus for the preventative protection of historic building wooden beams of claim 1 wherein said beam end closure cuffs comprise a pair of end plates symmetrically disposed on either side of the wooden beam, said end plates interlocking by cooperating male and female structures at the end face of the wooden beam.
3. The composite bandage device suitable for the preventive protection of the wooden beams of the historic building according to claim 2, wherein the end plates are bent steel plates, the two end plates are connected with a rotating shaft box at the upper surface of the wooden beams through bolts, the lower surface of the wooden beams is connected with a rotating shaft box through a fixing piece, the rotating shaft box is connected with a rotating shaft in a rotating mode, and two ends of the longitudinal bandages at the bottom of the beam are connected with each other through a first connecting lock after bypassing the rotating shafts on the rotating shaft boxes at two ends of the wooden beams respectively.
4. The composite bandage apparatus of claim 1 wherein said beam bottom longitudinal bandage is a steel strip or wire rope.
5. The composite bandage apparatus of claim 1 wherein said gear shaping adjustable elastomeric jacking pad is a comb-like structure with one side closed and the other side open, the top of said comb-like structure being in abutment with the lower edge of the wooden beam, the bottom of said comb-like structure being in abutment with said hoop bandage, said longitudinal bandage at the bottom of said beam passing between said comb teeth.
6. The composite bandage apparatus for the preventive protection of wooden beams in historic building according to claim 5, wherein the gear shaping type adjustable elastic supporting cushion is provided with an additional standby tooth space, and a rigid filling sheet can be inserted into the standby tooth space to adjust the effective supporting height of the elastic supporting cushion.
7. A composite bandage apparatus for the preventive protection of wooden beams in historic buildings according to claim 3, characterized in that the two ends of the hoop bandage are connected in tension by a second connecting lock.
8. The composite bandage apparatus of claim 7 wherein said first and second connection locks are any one of clip anchors, sleeve fasteners or bolt clamps.
9. A method of reinforcing a wooden beam using the composite bandage device of any one of claims 1-8 adapted for preventive protection of a wooden beam of a historic building, comprising the steps of: s1, installing beam ends on two ends of a wood beam to enclose hoops; S2, wrapping the longitudinal bandages at the bottom of the beam around the beam ends at the two ends of the wood beam, connecting the ends of the wood beam by using a first connecting lock and tensioning the wood beam for the first time to form a double-layer longitudinal bandage at the bottom of the beam; S3, inserting at least one gear shaping adjustable elastic top support cushion block between the tensioned beam bottom longitudinal bandage and the lower edge of the wood beam, and respectively inserting an upper bandage and a lower bandage of the beam bottom longitudinal bandage into tooth grooves with different heights on the gear shaping adjustable elastic top support cushion block to realize secondary tensioning of the beam bottom longitudinal bandage; S4, in the position of the gear shaping adjustable elastic jacking cushion block, the hoop bandage is used for winding the wood beam and the cushion block in a circumferential direction and tensioning and fixing the wood beam and the cushion block, after the hoop bandage is tensioned, the gear shaping adjustable elastic jacking cushion block is compressed after being pressed, the secondary tensioning force of the longitudinal bandage at the bottom of the beam is partially released, the retracted partial tension of the longitudinal bandage can be used for tensioning after loading by using load in the subsequent working stage, and meanwhile, the formation and expansion of oblique cracks of the wood beam at the position can be restrained after the hoop bandage is fastened.

Description

Composite bandage device and reinforcing method suitable for preventive protection of historical building wood beams Technical Field The invention belongs to the technical field of civil engineering, and particularly relates to a completely reversible composite bandage device and a reinforcing method for preventive protection of a wood beam of a historical building. Technical Field A large number of historic buildings stored in China are in a brick-wood structure, and the floor wood beams have the risks of reduced safety redundancy and easy brittle failure due to factors such as long-term load, material aging and the like. The reinforcement of such beams is a critical task in historic building protection. At present, the reinforcement technology for wood beams is mainly divided into two types, namely, the first type is a traditional reinforcement method, such as surface pasting carbon fiber cloth or steel plate. Such methods rely on epoxy adhesives, whose connections are irreversible, can permanently change and potentially cover the wood Liang Yuanmao, and colloid aging can cause secondary damage, not conforming to the core principles of "primitiveness" and "reversibility" in historic building protection. The second type is an external reinforcement method, for example, a rigid truss is added on the outer side of the wood beam. Although this type of method is removable, it is essentially a "reinforced replacement" structure designed for wooden beams that have suffered significant damage or have had significant bearing capacity deficiency. The steel beam is large in steel amount, relatively complex in structure and strong in visual invasiveness, is suitable for rescuing reinforcement, but is not suitable for wood beams which exist in a large amount in historical buildings, are not obviously damaged in detection, and can be degraded in internal materials. For such components, truss reinforcement, if commonly employed, would result in unnecessary economic costs, construction burdens, and excessive intervention in the interior space and landscape of the historic building. Therefore, the prior art has an obvious blank that a reinforcement technology and a reinforcement device which are specially used for the preventive protection requirement of the historical building wood beams, are light in weight, have little intervention and are completely reversible, and can effectively delay performance degradation and prevent brittle failure risk are lacked. The prior art is either irreversible to damage the original reality or reversible, but the scheme is too heavy, the cost is high, the intervention is large, and the method is not suitable for large-scale and preventive safety reserve improvement. Disclosure of Invention Aiming at the technical problems, the invention provides a composite bandage device and a reinforcing method suitable for preventive protection of historical building wooden beams, which are used for improving the bearing toughness of the historical building wooden beams in a plurality of ways without obvious damage and preventing the brittle failure risk possibly caused by material degradation. The method has the characteristics of low cost, convenient construction, convenient disassembly, relatively small influence on the actual appearance of the wood beam and the like, and is suitable for preventive protection of a large number of wood beams without obvious damage in the wood masonry structure of the historical building bricks. In order to achieve the technical purpose, the invention adopts the following technical means: A composite bandage device suitable for preventive protection of historic building timber beams, comprising: the beam end is enclosed with a hoop which is arranged at the end part of the wood beam and is used for forming enclosing constraint on the end part of the wood beam; At least one longitudinal beam bottom bandage arranged along the span direction of the wood beam, wherein the longitudinal beam bottom bandage is closed after encircling the bottom connecting pieces of the hoops around the beam ends at the two ends of the wood beam, and the head and the tail are connected by a first connecting lock to form a closed loop and are tensioned; At least one hoop bandage is wound around the wood beam in a circumferential direction and is tensioned on the outer periphery of the longitudinal bandage at the bottom of the beam; The gear shaping type adjustable elastic jacking cushion block is arranged at the position corresponding to the position of the hoop bandage, embedded between the hoop bandage and the lower edge of the wood beam, and a slot for the longitudinal bandage at the bottom of the beam to pass through is formed in the gear shaping type adjustable elastic jacking cushion block. Further, the beam end enclosing hoops comprise end plates which are symmetrically arranged on two sides of the wood beam, and the end plates are mutually matched and locked at the end face of the wood