Basalt-Fiber Reinforced Polymer (BFRP) bars have been recently proposed to be used to prestress precast concrete elements. Their mechanical properties, combined with the potential low production cost, the low carbon footprint and the enhanced durability, make this application promising, given some issues related to anchorage and sustained stress still need to be fully addressed. Applications at present are limited to very few laboratory tests. The paper discusses how the Serviceability Limit State (SLS) and Ultimate Limit State (ULS) checks of pre-stressed elements employing this technology vary with respect to elements pre-stressed with steel tendons. Furthermore, an attempt is made to investigate the potential application into the precast concrete industry, by analyzing several elements (roof and floor slabs) typical of the precast concrete industry with different crosssection. This investigation highlights which type of element could be more advantageously switched to the use of pre-stressed BFRP bars, and at which cost in terms of structural performance
On the Application of Basalt-Fiber Reinforced Polymer (BFRP) Bars to Prestressed Slab Elements Typical of the Precast Concrete Industry
B. Dal Lago;
2019-01-01
Abstract
Basalt-Fiber Reinforced Polymer (BFRP) bars have been recently proposed to be used to prestress precast concrete elements. Their mechanical properties, combined with the potential low production cost, the low carbon footprint and the enhanced durability, make this application promising, given some issues related to anchorage and sustained stress still need to be fully addressed. Applications at present are limited to very few laboratory tests. The paper discusses how the Serviceability Limit State (SLS) and Ultimate Limit State (ULS) checks of pre-stressed elements employing this technology vary with respect to elements pre-stressed with steel tendons. Furthermore, an attempt is made to investigate the potential application into the precast concrete industry, by analyzing several elements (roof and floor slabs) typical of the precast concrete industry with different crosssection. This investigation highlights which type of element could be more advantageously switched to the use of pre-stressed BFRP bars, and at which cost in terms of structural performance
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