Zehuan Zhang,Yuesong Dong,Shuoyang Zhang,Jie Yang,Chengtao Chen,Xiaoshuai Song,Xuhui Ma ,Shaojie Wang

Abstract

The seismic and sound insulation performance of walls affect building safety and occupant comfort, respectively. For this reason, this paper proposes a new composite concrete block with built-in foamed concrete that has the advantages of lightweight, easy construction, and sound insulation performance. Through direct tests and COMSOL-based simulation, the results demonstrate that the built-in foamed concrete can indeed improve the sound insulation performance of concrete hollow block wall, particularly in low-to-medium frequency ranges. To investigate the seismic performance of new composite concrete block bearing wall, low-cyclic reversed loading tests are conducted, and the results show that the wall exhibits good bearing capacity and deformation capacity, and the specimens retain structural good integrity even when loaded to failure, while the encrypted core column can enhance the load-bearing capacity by 11.66 %. Finally, a simplified micro-finite element model is established using ABAQUS software, and the average error between simulated and experimental peak load is 5.58 %, and the simulation results are basically consistent with the damage pattern of the specimens. The encryption of core column in the middle of the wall effectively disperses the distribution of the main stresses and reduces the stress concentration area. In addition, the damage mechanism of the wall is discussed to prove that the built-in foamed concrete can effectively improve the integrity, which provides a reference for the engineering application of the new composite concrete block bearing wall.

Paper

Linkage:https://www.sciencedirect.com/science/article/pii/S0950061825017994?via%3Dihub