Abstract
We propose a new method to strengthen structural masonry. To study on the axial compression behavior of masonry columns’ strengthening with a bamboo scrimber bar mesh mortar layer, axial compression tests of twelve masonry columns have been completed: nine strengthened columns and three unstrengthened columns. The failure process, bearing capacity, and failure mode are carried out. The strengthening method of bamboo scrimber bar mesh mortar layer permits the upgrade of the columns’ bearing capacity. The effects of bamboo bar ratio and mortar strengthening ratio on bearing capacity of the reinforced columns are compared. We propose the method for calculating the axial bearing capacity of such a reinforced column. The calculation results agree well with the experimental results, and the research results are available for engineering application.
Highlights
Most of China’s rural houses use self-built masonry structures
After strengthening of the bamboo scrimber bar mesh mortar layer, the cracking load of the brick columns increased by 39.4%–67.2%, and the peak load increased by
When the load is applied up to 70% of the ultimate load, several vertical cracks appear in the middle of the strengthening surfaces, two vertical cracks appear on the interface between the strengthening layers and the brick column, and new horizontal cracks appear on the strengthening surfaces corresponding to horizontal bamboo bars
Summary
Most of China’s rural houses use self-built masonry structures. Self-built masonry structures often have many defects and high vulnerability. The research results showed that the traditional strengthening method and the new retrofitting method could improve the bearing capacity of the masonry structures. The replacement of high-contamination, high-energy, nonrenewable steel bars in the structure with bamboo conforms to the current condition of China and contribute to the sustainable development of the construction industry and protecting the environment. This paper proposes a method of the bamboo scrimber bar mesh mortar layer to strengthen the masonry structures. Through the axial compression experiment, bearing capacity, ductility, failure form, and bamboo bar strain of the reinforced brick columns and the unreinforced brick columns are studied. The influence of parameters such as bamboo bar ratio and mortar strengthening ratio on bearing capacity of reinforced brick columns are analysed. A method for calculating the axial bearing capacity of such a reinforced brick column is proposed
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