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由于高强混凝土构件的截面尺寸通常较大,火灾过程中同一截面上各点曾遭受的最高温度一般不可能完全相同,即截面内存在温度梯度。因此,探讨高温(非均匀温度场)后约束高强混凝土的力学性能是十分必要的。文献犤1犦曾对高温(均匀温度场)后约束高强混凝土的力学性能进行了试验研究,在此基础上,通过修正含箍特征值的大小,将该文献的有关结果初步推广到了非均匀温度场的情况,并给出了算例分析。
Because the cross-sectional dimensions of high-strength concrete members are usually large, the maximum temperature that each point on the same cross-section has suffered during a fire is generally not likely to be the same, that is, there is a temperature gradient in the cross-section. Therefore, it is necessary to discuss the mechanical properties of high-strength concrete after high temperature (non-uniform temperature field) confinement. In the literature, the mechanical properties of high-strength confined concrete after high temperature (uniform temperature field) were experimentally studied. On this basis, the results of the literature were preliminarily extended to non-uniform temperatures by modifying the size of the hoop eigenvalues. The situation of the field, and gives a case analysis.