Hollow block masonry wall reinforced by built-in structural configuration: Seismic behavior analysis

Abstract

Abstract This paper proposes a new type of wall with built-in structural configuration. Common blocks with single-row holes serve as grouted recesses in the construction of built-in structural columns, core columns, and diagonal braces of the wall. The construction of this built-in structural scheme is more efficient and cost-effective than normal wall structures because it necessitates no formwork or large construction equipment. A nonlinear finite element analysis and integral modeling process were conducted based on horizontal cyclic loading tests of four hollow-block masonry walls with different built-in structural schemes. The feasibility of the model was verified by comparing the test and calculation results. The effects of different structural schemes on the failure process, failure mode, bearing capacity, stiffness degradation, and displacement ductility of the masonry wall were analyzed to determine the optimal structural details. The built-in structural columns and core columns should be concentrated at both wall ends while core columns are added in the center of the wall as necessary; a horizontal steel tie mesh can ensure cooperative bonding among structural columns and core columns. The effects of various strength grades of grouted concrete on masonry wall seismic performance with the optimized scheme were also observed.