Investigation of brick masonry with using of bad quality of bricks and reinforced concrete frame

Abstract

In some region typical resident houses are made of brick masonry. Ministry of Public Work Indonesia and JICA [2] have published a guideline as key requirements for safer houses. A study was carried out to obtain the effect of disparities material quality on the performance of the brick masonry. Six wall specimens were experimentally tested in-plane direction until failure by observing deformation, cracks, and uprooting of the wall. Study based on the finite element was also used by implementing the three-dimensional stress state of concrete and masonry and elastic-plastic for reinforcement. From the study it can be concluded that: the wall following guideline has enough strength but could not reach the load capacity because the wall was uprooted. Bad quality of concrete did not affect the stiffness and strength of the walls. The strength of the walls with a poor quality of mortar and poor quality of bricks comparison to the wall with standard quality of bricks had the strength of about 78%. Wall without plastering with a poor quality of the bricks, mortar, and concrete reduced the strength and stiffness to about 41% compared to the wall with standard quality. The proposed FE model can predict the strength of the wall well but not for its stiffness. The model especially the masonry material model still needs to be developed in order to obtain the close result with the laboratory test.