The Analysis Of Hysteretic Behavior For Chevron Eccentrically Braced Semi-rigidsteel Frame

Eccentrically braced as an anti-side system in the steel frame has been broad development and applied to the semi-rigid connection steel frame is very rare. Semi-rigid connection steel frame with good energy dissipation ability, eccentrically braced also has good anti-sideshift ability, the two together constitute a eccentrically braced semi-rigid connection steel frame system, also have the advantages of both to form two seismic system more enhanced the seismic performance of structures. On the one hand, combination of the two to improve and develop current structural system has an important role, eccentrically braced not only can compensate for steel frame with semi-rigid connection problem of low lateral stiffness, but also effectively improve the semi-rigid steel frame of the overall stiffness and lateral stiffness, solve practical engineering problems semi-rigid steel frame is difficult to apply to tall buildings; On the other hand, two kinds of energy system combined with a strong system, should be able to show a more robust seismic performance, this was also in order to explore stronger seismic system, and a beneficial attempt of reducing the number of human casualties and economic losses during the earthquake. Hysteretic behavior of the structure can fully reflect the energy dissipation capacity and seismic performance of structural system, therefore, to research eccentrically braced of semi-rigid connection steel frame hysteretic behavior has an important engineering significance.This paper on the basis of reading related specifications and literature, use of large-scale structural analysis software ANSYS conducted a nonlinear finite element analysis for eccentrically braced semi-rigid connections steel frame, consider a framework for connecting joint stiffness, frame layers, cross number, the type of braced and other parameters impact on the hysteretic behavior of structure. The study analyzes the main conclusions obtained are as follows: The greater Semi-rigid joint stiffness and lateral stiffness frame, the better hysteretic behavior; The existence of energy beams, so that energy dissipation capacity of the frame has been effectively improved; With the increase in the number of layers of the frame, the frame of lateral stiffness has obviously weakened; The across several and support of the frame have little effect to the overall structure of the hysteretic behavior.Finally, this paper come to some basic conclusions for eccentrically braced semi-rigid connections steel frames based on comparative analysis of finite element results, for the later research on hysteretic behavior and seismic properties of eccentrically braced semi-rigid connection steel frame make some recommendations, and providing a reference for eccentrically braced semi-rigid connections steel frame in the future development and studies.