Research on the Pretreatment of Canny and Analysis on Seismic Performance of RC Frame Structure with Semi-interlayers

摘要

Under the excitation of large earthquake, structures enter into high nonlinear stage. Currently, Opensees, Perform-3d and Canny are used as the most popular nonlinear analysis procedures. The fiber model can describe the flexural behavior and its interaction with the axial force in slender beam-column elements, so it is widely used in the nonlinear structural analysis applications, and all three soft wares referred above provide this model. Firstly, the fiber model will be introduced, including the classic fiber model and the improved one. Then attentions will be paid to the use of the improved fiber model to simulate the nonlinear behavior of RC shear wall. Later, this paper will introduce the nonlinear analysis models of Canny and develop the GID-Canny 2007 interface which is convenient for modeling and data input. Then the interface is used to conduct nonlinear time history analysis on a heavily damaged frame structure with interlayer in Dujiangyan during Wenchuan Earthquake. Analysis shows that the maximum absolute value of inter-story drift appears between the interlayer and its upper layer, and the heavy damage agrees well with the results of damage investigation. By comparing the damage extent of frame structures with or without interlayer, it reveals that the seismic performance of RC frame structures without interlayer is obviously better than that of ones with interlayer.