PLASTIC-DAMAGE ANALYSIS OF RCC DAMS STRENGTHENED WITH STEEL FIBER REINFORCED CONCRETE IN MONOLITH FOR SEISMIC RESISTANCE

摘要

In the paper, damage failure in the water-retaining monolith of Jin'an Qiao RCC dam subjected to strong ground motion is simulated by a concrete damaged plasticity model based on damage index variables of tensile stress. The effects of steel fiber reinforced concrete(SFRC) to strengthen the dam are studied by using three different dimensions of SFRC zones and three volume ratios of SFRC. According to the above combination of SFRC's applied zones and volume ratios, the variable rules of equivalent crack width , crack expansion depth, displacement response and starting crack acceleration are analyzed respectively. The comparison of calculation results shows the measure can remarkably reduce the damage zone, significantly control the extension of damage zone and effectively improve the aseismic performance of the dam.