Static Elasto-plastic Pushover Analysis To Pre-stressing Concrete Fabricated Frames

Pre-stressing concrete fabricated frames with beams and columns prefabricated is a new beneficial exploration of Chinese researchers recently.Prestressed duct is preseted on corresponding position of components,after transported to building site and hoisted in position, post-tension prestressed bars are drilled through prepared hole,then stretching prestressed bars in the position of nodes to form a structure.An experiment to study the seismic behavior of the beam-column joint under low-cyclic reversed load and a series of theoretical research about it is carried out by Liu Bingkang etc,from Hefei University of Technology.However,only the experimental data from the experiment of the beam-column joint is obviously inadequate to estimate the seismic behavior of a new system,especially to fabricated structure,because poor reliability of joint connection and bad globality is the characteristic of traditional fabricated structure,which is not beneficial to resistance destroy in seismic and difficult to satisfy force-bearing demand under cyclic lateral loads.Static elasto-plastic pushover analysis method provides convenience for us to recognize the seismic behavior of the pre-stressing concrete fabricated frames further. Based on the experiment of the seismic behavior of pre-stressing concrete fabricated beam-column joints,which is carried out by Hefei University of Technology, the study on the seismic behavior of such structure is mainly carried out in this thesis:1. Utilizing the experimental data,the moment-curvature curve of frame beams needed in this research is collated.At the same time,combining relative literature data,the section size,reinforcement arrangement and model of assembly of the frame analysed is given.2. Based on the destruction features of beam-column joints and applying the moment-curvature curve collated from experimental data,a Pushover analysis program for plane frame structure using capacity spectrum method based on Matlab is made.The evaluation for target displacement is vividly represented using graphics,for the powerful drawing function with Matlab.3. A series of frames with different span,storey height,span number or layer number is assembled. The seismic behavior of this structure is further investigated, through the checking computation of elastic-plastic deformation to some examples for pre-stressing concrete fabricated plane frames under rare earthquake load.Then, some improvement suggestions are provided for popularizing and applying this structure.