Abstract
Abstract Green high performance fiber reinforced cementitious composites (GHPFRCC) are a new class of sustainable cementitious composites, employing a high volume of fly ash to replace cement. In addition to increasing the sustainability of the construction environment, GHPFRCC exhibits a high tensile ductility and multiple cracking behaviors in the strainhardening state. These materials can effectively improve the structural energy dissipation capacity and structural durability. In this study, the optimum mixture ratio of GHPFRCC is presented established using an orthogonal experiment for a specific engineering application. The described GHPFRCC sustains the mechanical performance of concrete and is employed as the outer cladding to strengthen concrete columns. The finite element analysis of the material was based on the software ABAQUS and pseudo static experiments were conducted to exhibit retrofitting of GHPFRCC applied in the rehabilitation of seismic-damaged concrete columns. The computed and experimental results showed that GHPFRCC, while incorporating high volume fly ash, can retain significant multiple cracking behaviors. The energy dissipation capacity of the GHPFRCC reinforced concrete (RC) column is better than the comparable unreinforced column.
Highlights
Global earthquake disasters have occurred with increasing frequency in recent years, such as Wenchuan earthquake in China, which caused great casualties and property losses [2]
Green high performance fiber reinforced cementitious composites (GHPFRCC) is becoming a preferable repair material to strengthen the mechanical performance of reinforced concrete structures
We intended to test the feasibility of seismic damaged concrete columns strengthened by GHPFRCC using a computer simulation and laboratory experiments, the aim of which is to provide a solution to the problem of retrofitting earthquake-damaged concrete strictures
Summary
Global earthquake disasters have occurred with increasing frequency in recent years, such as Wenchuan earthquake in China, which caused great casualties and property losses [2]. The seismic damage of reinforced concrete frame columns during an earthquake may cause fatal impact to the structure. GHPFRCC is becoming a preferable repair material to strengthen the mechanical performance of reinforced concrete structures.
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