Effect of Multi-directional Restraint Induced by Reinforced Steel Bars on ASR Expansion and Bond Performance

In this study, we aim to investigate the interaction between alkali-silica reaction (ASR) expansion and multi-directional reinforced steel bars, clarify weakening mechanism of bond performance under influence interaction. First, a series pullout specimens considering bar diameter stirrup number were prepared then different degrees accelerated ASR test quantify restraint effect bars. After test, tests conducted on concrete. The results show that uniform reinforcement in concrete relatively small volumetric rate. Moreover, without stirrups showed an increase when rate was lower than 0.2%; however, some with increased 0.3% because attenuation delayed by stirrups. Finally, comparing analysis experimental results, chemo-mechanical method coupled model poro-mechanical verified. This can accurately predict expansion, stress-strain state, damage caused ASR.