Study On Seismic Performance Of Frame Structure And Frame-brace Structure Based On The Failure Mechaism

Reinforced concrete frame structure save steel, layout flexibly, can be mold good, cost lowly and abundant sources of material, which is China’s most widely used structural system. Stiffness of the frame structure is weak layer in the larger earthquake prone, and only one seismic line of defense, seismic performance is poor, can not effectively protect people’s lives and property. Previous earthquake damage of the earthquake phenomenon showed that the framework structure did not show the expected seismic bending type failure which is conducive to and did not show a larger energy dissipation capacity of the beam-hinge mechanisms or failure modes of the hybrid-hinge mechanism.Many scholars carried out extensive research about the destruction phenomenon of framework structure, but it is considered.from a single component. This paper analyzes the impact of failure mechanism to the overall shear stiffness and flexural stiffness and obtains the influencing factors. Through four different plane frame structure calculation analysis evaluated the influence of the overall shear stiffness and flexural stiffness of the seismic performance of frame structures.With the development of China’s economy in recent years, the hybrid structure made of two materials, or a combination of structure has become the new trend of development and focus research due to its many advantages. It is difficult to achieve the failure modes of the beam-hinge mechanism or hybrid-hinge mechanism because of the frame structure force characteristics. This paper proposes to change the structure by adding steel support system to change the structural failure mechanism. The design and layout of the support mainly consider the form of structural damage rather than the traditional strength, stiffness. The stiffness of framework-support structure system based on failure mechanism is usually among framework structure and framework-support structure. So that stiffness mutation of framework structure and framework-support structure is well solved.The support which use to change the framework of structural damage mechanism give full play to the role proved by the actual engineering in the city of Du Jiangyan and two modification program analysis by Pushover. The support consumes most seismic energy to avoid the destruction of the main frame structure and changes the failure mechanism of the frame structure significantly. Coupled with advantages of support structure in simple forms, reasonable and easy construction makes it a good prospect of application in practical engineering.