| At present, our country has been put forward performance-based seismic design theory in the seismic design code in spite of which is rarely applied in the practical engineering, and is mainly used in reinforced concrete structure. FRP bars as an alternative to steel, which has light quality, high strength, corrosion resistance and other excellent features and has attracted many attentions of the department of civil engineering. But the shortcomings of poor ductility performance usually result in suddenly structure failure when used in concrete structure. At this stage, the study of Fiber Reinforce Plastic(FRP) bars concrete structure’s ductility mainly concentrated upon a single component in domestic and overseas, especially about the FRP reinforcement beam and column ductility performance. So the research about the FRP bars concrete frame structure’s ductility and seismic performance is relatively less. Therefore, we carried out the study of the seismic behavior of FRP bars concrete frame structure is necessary.Based on the mechanical properties of FRP bar, this paper analysis of the seismic performance of FRP bars concrete frame structure. On the basis of stress deformation and damage characteristics of FRP bars concrete frame structure to developed one FRP bars plastic hinge connector, and using it into concrete structure, which can introduce ductility in the FRP bars concrete frame structure, and improve its seismic performance. Then we refer to America, Japan and other countries’ seismic design concept based on the performance, and on the basis of building seismic performance-based design in building seismic design code of China, by means of Pushover analysis based on performance to put forward a kind of based on the performance of FRP bars concrete frame structure seismic design method.In this paper, we build the finite element model of FRP bars concrete frame structure of implantation of FRP bars plastic hinge connector by using the finite element software, through Pushover analysis of the structure under inverted triangle distribution and uniform distribution four horizontal load models at different directions of it, getting the Pushover curve. Through the interlayer displacement angle of structure, law of development of plastic hinges, plastic hinge distribution, power spectrum curves to do the seismic performance analysis of structure, it is concluded that the structure bearing capacity and seismic performance indexes can meet the requirements of seismic design code in China, and energy dissipation capacity of the structure compared with pure FRP reinforced concrete frame improved much, and the plastic hinge introduces ductility for the structure, eventually make the structure corrosion and achieved with good ductility and energy dissipation capacity. Hereby, we summarize the means of the performance-based seismic design of FRP bars concrete frame structure, optimize the steps of FRP bars concrete frame structure seismic design, and provide a new thought to put FRP bars into the concrete structure in the future. |
