Study On The Shearing Resistance Performance Of Reinforced Concrete Beam After Fire

.With the degradation of steel and concrete material properties under high temperature and fire, building structures will lead to low carrying capacity. Therefore, it has important practical significance to carry out the role of bearing performance about fire research of building structures. Beam is an important role of building structure bearing, this paper mainly talk about different duration of action after fire and natural cooling and the deterioration law of its shear capacity under direct and indirect load of reinforced concrete beams, The main contents and results are as follows:(1) Used ABAQUS finite element software and based on the ISO standard heating and cooling the whole curve, raised reinforced concrete beams of rectangular cross-section on one side, three, four under fire conditions of temperature field and get the whole process of heating and cooling temperature field variation. of the beam cross-section(2)Based on oblique section reinforced concrete beams and shear bearing mechanism, meanwhile, learned from computational theory of reinforced concrete beams at room temperature.Got the formula of the fire anti-shear capacity under the proposed direct and indirect load of reinforced and carried out a numerical example.(3)With specific examples, discussed the variation based on Shear and Bending Beam ultimate load bearing capacity under the analysis of reinforced concrete beam shear and flexural ultimate bearing capacity,...