TY - GEN
T1 - Test of prestressed basalt frp concrete beams with and without external stirrups
AU - Thorhallsson, Eythor
AU - Gudmundsson, Sindri Hlifar
PY - 2013
Y1 - 2013
N2 - Steel reinforcing material suits well as concrete strengthening but has a large drawback, namely corrosion. This is mainly a problem where structures are subjected to water, salty environment or other chemical actions. For those conditions other reinforcing materials are convenient i.e. fiber reinforced polymer (FRP), which has been used widely for several decades. Basalt fibers (BFRP) are a rather new material to structural design, although it has been known for several decades. They are made from basalt rock, are very light and have tensile strength over twice as high as steel. BFRP has low elastic modulus 40-50 GPa compared to 200 GPa in steel, therefore its elastic lengthening is high, which induces cracking in concrete. To utilize BFRP tendons high strength and in order to prevent concrete cracking it is necessary to prestress them. To investigate the capacity of BFRP prestressed concrete sections, four beams were casted, with shear span to depth (a/d) ratio of 10.67. Two of the beams were without shearlinks. The other two were fitted with external shear links. All the beams were tested under four point statie loading.
AB - Steel reinforcing material suits well as concrete strengthening but has a large drawback, namely corrosion. This is mainly a problem where structures are subjected to water, salty environment or other chemical actions. For those conditions other reinforcing materials are convenient i.e. fiber reinforced polymer (FRP), which has been used widely for several decades. Basalt fibers (BFRP) are a rather new material to structural design, although it has been known for several decades. They are made from basalt rock, are very light and have tensile strength over twice as high as steel. BFRP has low elastic modulus 40-50 GPa compared to 200 GPa in steel, therefore its elastic lengthening is high, which induces cracking in concrete. To utilize BFRP tendons high strength and in order to prevent concrete cracking it is necessary to prestress them. To investigate the capacity of BFRP prestressed concrete sections, four beams were casted, with shear span to depth (a/d) ratio of 10.67. Two of the beams were without shearlinks. The other two were fitted with external shear links. All the beams were tested under four point statie loading.
KW - Basalt fiber
KW - BFRP
KW - Concrete beams
KW - Experimental work
KW - Prestress
KW - Shear strength
UR - http://www.scopus.com/inward/record.url?scp=85015620060&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85015620060
T3 - fib Symposium TEL-AVIV 2013: Engineering a Concrete Future: Technology, Modeling and Construction, Proceedings
SP - 393
EP - 396
BT - fib Symposium TEL-AVIV 2013
A2 - Dancygier, Avraham N.
PB - lsraeli Association of Construction and lnfrastructure Engineers (IACIE) and Faculty of Civil and Environmental Engineering, Technion - lsrael lnstitute of Technology
T2 - fib Symposium TEL-AVIV 2013
Y2 - 22 April 2013 through 24 April 2013
ER -