Mechanics Performance Analysis Of Large-bay Special-shaped Reinforced Concrete Columns Frame Structure

The special shaped columns frame structure has so many advantages such as being changed easily, economical and low price, what more, its residential environment is better than normal R.C structure and the space can be take efficiently advantage of .But this kind of structure system mostly is small bay room (about 3.3m), and research of the R.C large bay frame structure system with special shaped columns is less, which has better function and better economic benefit.And most of study on frame structure with special shaped columns is limited to district of 7 degrees.The majority has only carried on the research at elastic stage.So it is necessary to carry elastic and plastic analysis of large bay frame structure with special shaped columns by time history method.In this paper, it contrastive analysis dynamical characteristic of The R.C. special shaped columns frame structure and rectangular columns frame structure by using building 3 D spatial analysis model, contrastive analysis transformative characteristic and distributing rule of internal force of large bay special shaped columns frame structure and rectangular columns frame structure, found that the frequency of the two frameworks are not large difference, the first, the second and the fourth, the fifth rank of translational frequency almost equals, but the structure of the framework of the three, and the six step change in frequency than a rectangle structure of the framework of a higher frequency. Spectrum in response to the comparison and analysis methods of the column frames and bounding rectangle structure of a framework in the shape of the properties, belong to that the structure shape curved, the framework of the floor of the displacement less than a framework of the rectangle floor level and shifts large rectangle structure of the framework of the first floor, the stiffness of the first floor buckled up, but a weak level.History domain method identified the column frames and bounding rectangle structure of a framework in the shape of the properties and the internal force distribution, the analysis by two types of structure shall not be reversed, the column frames and bounding rectangle structure of the framework of the two of the direction of the displacement are similar,The L shape of a rectangle with the corresponding columns of the shear force, it is almost similar in one direction,but another vertical escapement for rod ends of the shear force is very big difference, compared to the rectangle,the two direction of the shear force by T shape and十shape pillar are very similer. Finally, this paper analysis force characteristic of special shaped columns frame structure and T type columns by building 3 D entitative finite element model which are under horizontal force and some important conclusions on force characteristic of special shaped columns frame structure are reached,they come to the conclusion is that the post structure of the overall framework for the better for the ductility, it is very beneficial to the structure of the earthquake resistance.The first bend crack appeared near the post of the corner of T type columns, and with load increases,the level crack is extend from the plinth to the compressive region.It also extend to the top of the pillar.