Analysis of actual confinement provided by high‐strength steel spirals in reactive powder concrete of anchorage zones

Abstract

The local bearing strength and deformation capacity of the reactive powder concrete (RPC) specimens can be dramatically improved by arranging steel spirals. In effect, the actual stress level of spirals is closely correlated with the compression behavior of concrete loaded over limited area. However, limited work has been focused on the actual stress of steel spirals in RPC. To obtain the actual confinement provided by the high-strength spirals in anchorage zones, 10 RPC specimens loaded over limited area were conducted. The loadspiral strain relationships and the deformation-spiral strain responses were discussed to investigate the lateral response of RPC. The high-strength spirals failed to reach the yield strength at the peak load, and the actual strain of the spirals ranged from 1800 to 2500 με, while the residual strength of the highstrength spirals could be fully utilized after the peak load. The actual stress of

Green demolition technology of reinforced concrete slab: Application of soundless chemical demolition agents and its evaluation system

“…The t was independently used to represent the progress of the expansive pressure development and the demolition process. Besides, the concrete around the hole was regarded as the constraint on SCDAs, which was related to the D , S H , and f cu 40–44 . The concrete constraint factor ( λ ) was provided to quantify the constraint of the concrete, as shown in Equation ().…”

“…Besides, the concrete around the hole was regarded as the constraint on SCDAs, which was related to the D, S H , and f cu . [40][41][42][43][44] The concrete constraint factor (λ) was provided to quantify the constraint of the concrete, as shown in Equation ( 8). The basis for determining its form was the quantitative analysis of the D, S H , and f cu .…”