Numerical Simulation of Temperature Field in Wood-H Shaped Steel-Concrete Composite Column with Square Cross Section after Exposure to Four-Side Fire
A new type of wood-H shaped steel-concrete composite column with square cross section was proposed to study the temperature field distribution law of composite column under fire.ABAQUS finite element software was used to establish the heat transfer model of the composite column,and ISO-834 standard fire curve was adopted to warm up the column,and the influence of concrete thickness,recycled coarse aggregate substitution rate and bolts on the temperature field and charring of wood in the composite column was investigated.The temperature field of the wood was distributed bi-directionally and symmetrically;for every 10mm increase in concrete thickness,the charring depth of the wood at the bolt holes decreased by 25.43%on average,and the initial charring time was delayed by 22.82%on average;for every 20%increase in recycled coarse aggregate substitution rate,the charring depth of the wood decreased by an average of 6.34%,and the initial charring time was delayed by an average of 5.60%;the presence of bolts exacerbated the charring of the wood,and the charring depth of the wood at the bolt holes was 57.13%more.Under fire,there is still a large effective residual cross-section after the charring of the wood inside the composite column.The H shaped steel is wrapped with wood,and the strength deterioration is slow.The fire resistance performance of wood-H shaped steel-concrete composite columns is good.
composite columnstandard firetemperature fieldfinite element analysis
万方数据
维普
