Kunming University of Science and Technology
National Natural Science Foundation of China
A new flexibility-based nonlinear finite element model which considers shear deformation and coupled flexural-shear effects is proposed in this article. Cyclic loading tests of T-shaped and L-shaped shear wall specimens have been carried out to verify the proposed model. Results showed that all specimens exhibited a flexural model characterized by crushing of concrete and buckling of reinforcement at the free web boundary. Closely spaced stirrups and longer confined boundary elements should be used in the free web end to prevent premature failure under compression. The seismic design of boundary element at the web-flange junction could be appropriately relaxed, because of no obvious concrete spalling was observed at the web-flange junction. With the decrease of the shear span ratio, the ductility decreased obviously. The specimens exhibited higher strength and stiffness but lower ductility when the flange was in tension. Numerical simulation of cyclic loading test of RC flanged shear wall is conducted based on the proposed model, demonstrating that the model is efficient to simulate nonlinear response of RC flanged shear walls, proved by the satisfactory agreements between analytical and test results.