Experimental Study on the Seismic Performance of Recycled Concrete Hollow Block Masonry Walls

Abstract

This paper aims to manufacture recycled concrete hollow block (RCHB) which can be used for the masonry structure with seismic requirements. Five RCHB masonry walls were tested under cyclic loading to evaluate the effect of the axial compression stress, aspect ratio, and the materials of structural columns on the seismic performance. Based on the test results, the failure pattern, hysteresis curves, lateral drift, ductility, stiffness degradation, and the energy dissipation of the specimens were analyzed in detail. The results showed that with the increase of aspect ratios, the ductility of RCHB masonry walls increased, but the horizontal bearing capacity and energy dissipation of RCHB masonry walls decreased. With the increase of compressive stress, the bearing capacity and energy dissipation performance of RCHB masonry walls were improved, and the stiffness degraded slowly. The results also demonstrated that the RCHB masonry walls with structural columns, depending on whether the structural columns were prepared by ordinary concrete or recycled concrete, could increase the bearing capacity, ductility, and energy dissipation of specimens. The research confirmed that RCHB masonry walls could meet the seismic requirements through thoughtful design. Therefore, this study provided a new cleaner production for the utilization of construction waste resources.

Seismic Performance of Masonry Walls Built with New Type of Fired Shale Hollow Blocks

“…It could also be observed that the compressive stress could increase the shift angle of the specimens. Similar conclusions were also provided by Liu et al [31].…”

“…It could be concluded that the secant stiffness at different characteristic states increased with the decrease of aspect ratio and increase of compressive stress. e stiffness degradation and secant stiffness of the specimens are similar to those provided in the literature [31].…”

“…It could also be obtained that the compressive stress had an adverse effect on the value of h e,u in the maximum state, while in the ultimate state, h e,u increased with the increase of compressive stress, which may be due to the brittleness of the blocks. When the compressive stresses of the specimens with structural columns were small (W3 and W5), the trends of equivalent viscous damping coefficients are slightly different from the conclusions made by Liu et al [31], and more tests should be carried out to analyze the reason why this happens.…”

“…Grouted reinforced masonry walls could also show good seismic performance [28][29][30]. Concrete blocks are also widely used in recent years, Liu et al [31] used recycled concrete hollow blocks to construct five masonry shear walls, and the seismic performance of specimens was carried out by cyclic loading tests. e results demonstrated that the aspect ratio, compressive stress, and structural columns would affect the seismic performance of the concrete hollow block walls.…”

Shaking Table Test of U-Shaped Walls Made of Fiber-Reinforced Foamed Concrete

“…Several studies have been carried out to understand the seismic performance of URM and cement-based structures using dynamic tests. These investigations include cyclic loading of walls and structures using actuators [8,9] and shaking table testing [10,11]. In many cases, researchers have utilized scaled models for the dynamic testing of masonry structures [12,13] since the testing of full-scale models could be costly or infeasible.…”