Experimental study on seismic behavior of shear wall with fiber reinforced polymer concrete

In order to improve the seismic performance of common concrete shear wall with concealed bracings, fiber reinforced polymer modified concrete instead of ordinary concrete was applied to the shear wall as described in this paper. In this paper, the experimental study on the seismic performance of two different types of shear walls under cyclic loading was carried out, and also the failure characteristics, bearing capacity, ductility, hysteretic curve, stiffness attenuation and energy dissipation performance of the proposed shear wall were analyzed systematically. The test results show that the seismic performance of fiber-reinforced polymer modified concrete shear wall is significantly improved because its the damping ratio, deformation capacity and energy dissipation capacity are greatly improved compared with ordinary concrete shear wall with concealed bracings, which ensures its better stiffness stability in the later stage.

Experimental Research of Low Shear Wall with SMA Bars Concealed Bracings

Many researchers study the seismic performance of shear wall embedded with reinforced concealed bracings, but not take the shape memory alloy bars concealed bracings into account. Quasi-static tests of a low shear wall with reinforced concealed bracings and a low shear wall with SMA bars concealed bracings are performed to study the seismic performance of the shear walls. Bearing capacity, stiffness, ductility, hysteretic energy and residual deformation of two specimens are researched and analyzed. The experimental results indicate that the SMA bars concealed bracings can increase the strength and ductility of the low shear wall considerably.

Nonlinear Analysis of I-Shaped Short Pier Shear Wall with Concealed Bracings

In this paper, research on I-shaped short pier shear wall model which is the relatively weak seismic system components is presented. According to the results of Finite element software ABAQUS simulation, the influence of the bearing capacity, ductility and skeleton curve behavior on the I-shaped short pier shear wall with concealed bracings is mainly studied under different axial compression ratio and different reinforcement proportion of the concealed bracings. The results indicate that the I-shaped short pier shear wall with concealed bracings has a higher carrying capacity, and the ductility has also been enhanced. And the factor that axial compression ratio, reinforcement proportion of the concealed bracings significantly affect the seismic behavior of the I-shaped short pier shear wall with concealed bracings

Experimental Study on Seismic Performance of New Type of RC Core Walls

In high-rise concrete structures, the elevator or stairs which located in the middle of the building are always put into the RC core walls. It not only meets the requirements of the function of usage, but also makes the core walls bear most of the lateral force and becomes the main component in the whole structure that resists the lateral force. Therefore, the seismic performance of RC core walls is of great concern to engineering. At present, there is little experimental study on measures of improving the seismic performance of RC core walls. In this paper, firstly, a new type of construction measure is put forward to improve its seismic performance. Secondly, through the experimental study on one 1/6 scale core walls with concealed bracings and one 1/6 scale normal core walls under the low cyclic loading, the effect of concealed bracings on bearing capacity, stiffness, ductility, hysteresis, failure phenomena and energy dissipation of concealed bracings are discussed. The experiment shows that the seismic performance of RC core walls with concealed bracings is improved remarkably.