Reinforced rubberized continuous deep beams under cyclic loadings

Abstract

Continuous deep beams (CDBs) expose usually to repeated and cyclic load by loading and unloading states and the wave of an earthquake. Adding scraped tires rubber to the concrete mix (which is researcher interesting nowadays) improves its dynamic properties besides the sustainability purposes. Six CDBs were cast and tested experimentally under static and repeated loads. It can be concluded that the CDBs loss about 39% and 30.1% of their ultimate capacity after 10% volumetric replacement of sand and gravel respectively. Also, the ultimate strength of the beams decreases when compared with the static loads by 14%, 8% and 9% for conventional beam, gravel and sand replacement beams respectively. The cyclical results confirm that each load (positive and negative) make its own strut, till it’s crossed together and the beams losses about 35 to 45% of their capacity due to the cycles. As a conclusion, it could be noting that the static loading results match with the strut tie method calculations.