Test research on fire resistance of Jialiang when changing the skin so rampantly

Green high-performance fiber-reinforced cementitious composites (GHPFRCC) is a new type of green building material made of traditional ECC by adding a large amount of fly ash. GHPFRCC has the characteristics of high ductility and is very suitable for frame beams, columns and joints. However, as a new type of structure, GHPFRCC frame beams have less research on fire resistance. The fire resistance test of the beam was carried out to study the effects of load ratio, longitudinal reinforcement ratio, shear-span ratio and other factors on the mid-span deflection and temperature field distribution of GHPFRCC frame beams under fire. The test results show that the heating rate of the GHPFRCC frame beam under fire is the fastest at the bottom of the beam, and the slowest is at the top of the beam; the shear-span ratio is the main factor affecting the failure form of the GHPFRCC frame beam under fire; the mid-span deflection curve decreases approximately linearly. , and the greater the shear-span ratio, the greater th