Seismic Performance Analysis Of Frame Structure Strengthened By Different Methods

With the economic development and urbanization in full swing,the community of schools,hospitals,homes,shopping malls,office buildings and other public facilities construction is increasing,today’s new buildings can’t meet people’s needs.In order to be able to meet the needs of people now and to play its real value in society,a large number of existing buildings need to transform and reinforcement.Building reinforcement industry has developed rapidly in recent years and can be rewarded with very little input.Due to the impact of earthquakes on the greatest damage to buildings,the seismic performance analysis of existing structures has been paid attention.The engineering example used in this paper is a four-story reinforced concrete frame structure.Through the detection and identification,the interlayer displacement angle of the original structure has the limit condition,the axial compression ratio of the column does not meet the requirements,some of the beams have the phenomenon of corrosion,Method to improve the original structure of the existing problems,mainly completed the following work.⑴ Access to the relevant Chinese and foreign information and literature,to understand the current domestic and international development of the status in structural reinforcement.Through the comparison of the development of structural reinforcement at home and abroad,the importance and necessity of strengthening the building structure in the present era.⑵ Some reinforcement methods commonly used in China are described,and the characteristics of different reinforcement methods are analyzed.The theory of seismic theory of structure is described,and the calculation theory of partial reinforcement method is discussed.⑶ The basic situation of the engineering structure is introduced,and the inter-layer displacement,the displacement angle and the axial compression ratio of the column are calculated by PKPM software.The self-vibration period and the layer of the original structure are obtained Inter-displacement and interlayer displacement angles.⑷ After analyzing the reinforced concrete frame structure,the reasonable reinforcement scheme is selected to reinforce it.The use of slotted steel X support for the overhanging inter-layer displacement angle can effectively improve the displacement angle overrun,some of the beam selection of carbon fiber package,for the pillars of the two reinforcement program to increase the cross-section method and the outer steel reinforcement method,The modal analysis of the reinforced structure was carried out.⑸ Three different seismic waves are selected,and the dynamic response analysis of the structure under the action of the earthquake is carried out.Then,the results of the two kinds of reinforcement are compared and analyzed by the three seismic waves under the rare earthquakes.⑹ Describes the seismic effect of the four-story frame structure and the seismic performance of the reinforced structure,this paper points out some shortcomings and areas for improvement.