Test And Static Elastic-plastic Analysis Of Steel Frame-bent Structure Of A Main Power Plant

Massive damage caused by earthquakes indicates that, the intense earthquakeoften causes serious harm to people’s life and property. As important electric powerfacilities and life-line engineering, power plant must have considerable anti-seismicperformance. Neither the transverse nor the longitudinal of the main factory buildingframework stiffness is asymmetric. The center of stiffness departs from the centroid alot. Because of equipment or piping layout needs, it is impossible to lay the seismicsupport or seismic wall of the longitudinal framework for fully symmetry, which isbenefit to the earthquake request. Torsion of the main factory building is inevitablewhen earthquake take place. So investigate on seismic behaviors of this kind ofstructures is of importance on practical and theoretical values.In this paper, the steel frame-bent structure a main powerhouse of large powerplant is designed and manufactured with1:10scale, and the experiments research onits mechanics capability and seismic performance is carried out under low reversedcyclic loads. Meanwhile the hysteresis loops and skeleton curve are also given. Thehysteresis behavior, deformation capacity, bearing capacity, ductility, energydissipation, rigidity degeneration and failure mechanism are studied. The resultsindicated that the steel frame-bent structure has good seismic mechanics performance.In addition, based on the test results, nonlinear finite element analysis is used tosimulate the test model with the help of SAP2000in the8and9degree seismic region.The results of finite element analysis are fit close to that of the test. So the finiteelement analysis method’s correctness is validated. And then, the Push-over method and two lateral load models are adopted with the SAP2000to analyze the steelframe-bent structure of the prototype. In analysis of the results including the nonlinearbase shear-roof displacement relational curves, capacity spectrum curves, the floordisplacement, the story drift, the development trend of plastic hinges and so on, we canevaluate the seismic resistance of the structure. From these results, the structure systemmeets elastic-plastic deformation on8and9degree seismic region, and haveconsiderable anti-seismic performance.