Displacement-Based Design Theory And Method Of Steel Reinforced Concrete Frame Structures

Performance-based seismic design (PBSD) is an emerging and advanced concept for seismic design of structures. Compare to traditional seismic design theory, PBSD has many characteristics, such as flexibility, suitability and pertinence. Nowadays, with the rapid development of economy and materials, PBSD is recognized by more and more building owners and structures designers. Displacement-based seismic design is one of the important methods on performance-based seismic design, it have such advantages that the performance level is more straightforward and the method is easy to use as it will represent the development tendency of seismic design in this century.However, PBSD remains to be perfected in many aspects, among which the performance level and its evaluation index are important aspects. Centering round this, the dissertation involves the following work.Based on the analysis of the research and rules on performance level of domestic and foreign literatures, four classes seismic performance level and four classes anti-seismic fortified purpose are proposed for steel reinforced concrete frame structure.According to the analysis of relationship between displacement and damage, it is concluded that inter-story drift can be used as quantization indexes in the seismic behavior of frame structure. Combined with PBSD of RC buildings, the test research of SRC frame systems and SRC columns, a series limits inter-story drift index of SRC frame for four different performance levels are recommended.A improvement have been made to the direct displacement-based design method. By using of the direct displacement-based design method, a nine floor SRC frame structure is designed according with different performance levels under different earthquake levels. It is concluded that indexs of the different performance levels expressed by the inter-story drift ratio proposed in this paper can availably control the seismic behaviour of reinforced concrete frame structure under different earquake levels, which is help to the structure degigner for performance-based seismic design.