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受到热作用的普通混凝土结构和耐热混凝土结构,其跨度通常不大,但荷载较大,因此,结构的斜截面强度很重要。与平炉、转炉和其他热工设备的运行有关的各项生产活动,在散发出大量热能的同时,伴随着产生大量的侵蚀性气体和粉尘。在这种条件下,斜截面的抗裂性同样也很重要。梁的斜截面强度取决于平面应力状态下的混凝土强度。斜截面的抗裂性和强度的计算,要按CH482-76的要求,考虑混凝土的抗拉强度。现在还没有对含水率正常的混凝土受到热作用时的抗拉强度进行过专门的研究。全苏热工工程科研设计院和德聂伯罗彼德罗夫斯克建工学院研究了在各种加热和受力顺序的作用
The heat-resistant ordinary concrete structures and heat-resistant concrete structures are usually not large in span, but the load is large. Therefore, the oblique section strength of the structure is very important. The various production activities associated with the operation of open hearths, converters and other thermal equipment generate a large amount of thermal energy and generate a large amount of aggressive gases and dust. Under such conditions, the crack resistance of the oblique section is also very important. The oblique section strength of a beam depends on the strength of the concrete under plane stress. The calculation of the crack resistance and strength of the inclined section shall take into account the tensile strength of the concrete in accordance with the requirements of CH482-76. There is no specific study on the tensile strength of concrete with normal moisture content when it is exposed to heat. The entire Soviet Union Thermal Engineering Research Institute and Dnepropetrovsk Institute of Engineering studied the effects of various heating and stress sequences.