Strengthening method for concrete flexural member
A bending component and concrete technology, which is applied in building construction, construction, building maintenance, etc., can solve the problems of low material utilization rate, large influence of structural self-weight, and increased bending stiffness, so as to achieve good overall performance and convenient construction , The effect of increased bending stiffness
Inactive Publication Date: 2011-09-14
WUHAN UNIV
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Problems solved by technology
[0005] The present invention mainly solves the technical problems existing in the prior art that the reinforcement of the enlarged cross-section generally increases the cross-section of the original structure greatly, has a great influence on the self-weight of the structure, and the material utilization rate is not high; A reinforcement method for concrete flexural members that can greatly increase the flexural stiffness and greatly improve the bearing capacity
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[0027] A method for strengthening concrete flexural members, comprising the steps of:
[0028] Step 1: Implant the self-locking anchor rod with inorganic adhesive material on the tensile bottom surface of the original concrete flexural member and reserve part of the end of the self-locking anchor rod; the self-locking anchor rod has threads, and the preload can be applied by tightening the nut .
[0029] Step 2: Insert the channel steel plate into the self-locking anchor rod through the reserved hole on the channel steel plate, and use the nut at the end of the self-locking anchor rod to position the channel steel plate. When positioning, the notch faces the tensile bottom surface of the bending member And reserve a height space between the channel steel plate and the tensile bottom surface of the concrete flexural member; it should be noted here that the height of the reserved space between the channel steel plate and the tensile bottom surface of the concrete flexural member...
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The invention relates to a strengthening method, in particular to a strengthening method for a concrete flexural member. According to the method disclosed by the invention, the tension bottom surface of the concrete flexural member 7 is implanted into a self-locking anchor rod; and the strengthening method generally comprises the steps of drilling holes, expanding the holes, cleaning the holes, pouring inorganic adhesive materials, implanting the anchor rod with a cone head, exerting pressure by self-locking, and the like. One end of the self-locking anchor rod 3 is provided with a screw thread, and a certain preliminary pressure can be exerted by screwing a screw cap 2; a certain preliminary pressure is exerted by screwing the screw cap at one end of the self-locking anchor rod so as to provide a reliable adhesive force for material combination and strengthening; and however, the preliminary pressure is exerted after post-poured high-performance concrete strength reaches 50%. Therefore, the invention has the following advantages of: 1. great improvement of the flexural rigidity of the whole cross section, great enhancement of bearing capacity and prominent improvement of shear resistant performance; 2. fine integral performance and high reliability; and 3. fine durability, convenience for construction and cost saving.
Description
[0001] technical field [0002] The invention relates to a reinforcement method, in particular to a reinforcement method for concrete bending members. Background technique [0003] Due to design and construction defects or factors such as aging, damage and disasters in the long-term use process of a large number of concrete flexural components of industrial and civil buildings, a considerable part of the components are cracked, bearing capacity is insufficient, and many other problems that affect safety and use functions. Reinforcement is urgently needed. For example, in civil buildings, due to the reconstruction of building structures, the addition of machines in industrial plants, and the overloading of bridge structures, the bearing capacity of the original structure is insufficient, and it is urgent to greatly increase the bearing capacity of flexural members through reinforcement methods. . [0004] At present, in the actual reinforcement of concrete flexural member...
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Inventor 卢亦焱张学朋李杉龚田牛
Owner WUHAN UNIV