CN-121976635-A - Structure construction method for changing damage form by adjusting bearing mechanism

Abstract

The invention provides a structural construction method for changing a damage form by adjusting a bearing mechanism, and belongs to the technical field of concrete member damage forms. The present invention is directed to a component that is subject to brittle failure, which becomes ductile during loading by a method of prefabricating a pilot crack. The invention changes brittle fracture into ductile fracture by guiding the fracture, and makes it possible by structural design.

Inventors

• HUAN HUILING
• WU DI
• WANG JING
• WANG HAICHAO
• SHI YIJIE
• LIU HONGZHU
• YIN YANQUN
• FAN WEI

Assignees

• 山东外国语职业技术大学

Dates

Publication Date

20260505

Application Date

20240312

Claims (5)

1. 1. A structural construction method for changing a failure mode by adjusting a load bearing mechanism, characterized in that brittle failure is changed into ductile failure by a method of prefabricating a pilot crack during loading for a member where brittle failure occurs.
2. 2. A method of constructing a structure for changing a failure mode by adjusting a load bearing mechanism according to claim 1, wherein the brittle failure is ductile failure by changing a position and a size of a pilot crack during loading.
3. 3. The method of claim 1, wherein the member is a small eccentric compression member or a bridge of a shear wall structure.
4. 4. A method of constructing a structure for modifying a failure mode by adjusting a load bearing mechanism as claimed in claim 1, wherein means for controlling ductile development during disassembly are arranged laterally of the member in order to avoid brittle failure during rapid fracture.
5. 5. The method of claim 4, wherein the component is a transverse steel bar of the class HPB 300.

Description

Structure construction method for changing damage form by adjusting bearing mechanism Technical Field The invention relates to the technical field of concrete member damage forms, in particular to a structural construction method for changing the damage form by adjusting a bearing mechanism. Background At present, as for reinforced concrete members, short columns are inevitably formed at the bottom layer part due to the high layer number, connecting beams at the door opening of the shear wall structure are deep beam members, and the two members belong to brittle failure members. However, it is difficult to avoid such a situation in the conventional design, and it is an object of the present invention to change the current situation. In the past, split columns are available, namely the columns are firstly divided into a plurality of small columns, a short column is formed by a single body, and each small column is actually in a working state (large eccentricity) of the small column from the beginning until the small column is damaged, and the damage form is not changed; The method adopts a separation material to embed the partition board type material in the part which is just separated, thus the partition board type material is actually used as a reinforcing and reinforcing member of the rib; The design of the shear wall connecting beam is the same, and the two (or more) adaptive ribs Liang Diezhi are designed, so that the superposed beam is in the working state of two adaptive rib beams at first or in the cooperative working state of a certain beam serving as a basic beam, and the reference method provided by the patent is to specify that the components have two definite working states, namely a deep beam working state (brittle working state) in the early stage and an adaptive rib beam working state (ductile working state) in the later stage. Disclosure of Invention In view of the above, in order to solve the problem that it is difficult to avoid brittle fracture in the prior art, the present invention provides a structural method for changing the fracture morphology by adjusting the bearing mechanism, which changes the brittle fracture into ductile fracture by guiding the fracture, and makes it possible by structural design. In order to achieve the above purpose, the present invention provides the following technical solutions: a structural construction method for changing the damage form by adjusting the bearing mechanism changes the brittle damage into ductile damage by a method of prefabricating a guide crack in the loading process aiming at a component with brittle damage. Preferably, the embrittlement fracture is made ductile by changing the location and size of the pilot fracture during loading. Preferably, the members are small eccentric compression members or tie beams of a shear wall structure. Preferably, in order to avoid brittle failure during rapid fracture, components are arranged laterally of the component to control ductile development during disassembly. Preferably, the component is a transverse steel bar of steel grade HPB 300. The structural construction method for changing the damage form by adjusting the bearing mechanism changes brittle fracture into ductile fracture by guiding the fracture, enables the ductile fracture to be possible by structural design, and enables the ductile fracture to be scientific by changing the geometric conditions (setting positions and sizes) of the guiding fracture. Detailed Description In structural design, the components which are inevitably designed into components which are likely to be subjected to brittle fracture, such as small eccentric compression short columns and connecting beams (deep beams) of a shear wall structure, are subjected to brittle fracture, and under the combined action of certain loads, the short columns in the general sense are inevitably subjected to small eccentric compression, so that the brittle fracture is generated. The large eccentric compression members shallow beam (rib-adapted beams) are ductile and mainly cause brittle fracture due to geometrical reasons, load action and the like of the original design. The object of the present invention is to change the fracture form of a member, which is inevitably likely to undergo brittle fracture, from a brittle fracture form to a ductile fracture form. For this purpose, the invention provides the following technical scheme: The invention relates to a structural construction method for changing a damage form by adjusting a bearing mechanism, which changes the brittle fracture into ductile fracture by a method of prefabricating a guide crack in the loading process of a member with brittle fracture, wherein the invention is based on the basic theory of fracture mechanics, and the damage form is controlled by changing the setting position and the size of the guide crack by applying the guide crack, and the concrete steps are as follows: The bearing capacity of the short column is d