The Seismic Behavior Of The Internal Beam-Column Joints Of R.C Frames Strengthened By Carbon Fiber

It is one of main structure style which commonly applied in the building and architecture areas.with the time passing by,its capacity of sustain load and function of using may not suit to the standard of norm.So it need steady to keep structure safety and reliability.The issue of reinforcement always be an important topics not only domestic but also foreign until now its research being the stage of discovery and development.There are many problems relate to application of reinforcement technology and reasons of reinforced environment.Not only the reinforcement need follow the existing norms and standard,but also it relate with old engineering practices,design and construction of the technological level.Therefore,carrying out a reasonable and effective engineering,applied research of reinforcement of reinforced concrete has an important economic and social significance.Reinforced concrete frame structure nodes are essential parts of the structure,as a link between the structural components,the internal force distribution, transmission of internal forces,the coordination between the components of the deformation,so that the structure of the overall work,but also bear the main internal forces,seismic design requirements of "strong node "Designed to resist seismic shear,once node damage,structural damage will be.So the seismic study of reinforcement in structure node is very important.Carbon fiber is a new material,first used in space,and its high tensile strength steel are as much as ten times,with anti-corrosion,anti-fatigue,light weight, convenient construction,etc.In recent years,construction technology and the level of design is getting more sophisticated,so applies to the node are an ideal material for reinforcement.This paper make the node of middle frame as the main target, through the imposition of scale model of the cyclic loading until the specimen damaged to study seismic performance after the reinforcement nodes.CFRP reinforcement in order to reveal the framework of space nodes and damage mechanism of shape,come up with a reasonable program and design requirements for reinforcement,which provides a basis for the design and construction.