In the experiment, we also found that only the hinge is not enough, and the hinge can make the furnace roof float up and down when the temperature changes, releasing the thermal stress inside the furnace roof. If a certain expansion joint is not provided at the hinge, the stress concentration will still be caused locally. Therefore, the articulated part should be based on the performance of the material, the characteristics of the furnace roof, and the operating temperature of the furnace top, after a certain calculation, combined with the actual Use experience to determine the size of the expansion joint.
Comparison and Analysis of Stress State of Low Stress Precasted Arch Roof and Integral Arched Roof . In order to quantitatively analyze the stress state of low-stress precast vaulted roofs and integral vaults and to verify the rationality of low-stress prefabricated vaulted roof structures, we have used computer-to-integral vaulted roofs and low-stress arches in our research process. The top of the furnace was simulated separately and compared. In the calculation we use the two-dimensional finite element method.
In order to facilitate analysis and comparison, except for the structure of the two arched roofs, the other conditions (material, temperature field, etc.) are the same. Irrespective of quenching, rapid heating, or normal use, the thermal stress inside the low-stress preformed dome is much smaller than the thermal stress inside the integral dome. In order to verify the accuracy of the stress model, and also to obtain a more accurate and direct understanding of the actual state of the stress distribution of the low-stress prefabricated arch roof, we conducted high-temperature simulation tests on the realities of the two large-scale prefabricated vaults. In the process of heating and cooling, the strain output of two types of vaulted roofs. The measured results confirm that the stress distribution trends in the arch roofs of the two structures are basically consistent with the results of the simulation calculations; the internal stress of the low stress dome is less than the internal stress of the overall dome; the inner side of the overall dome is under greater compressive stress, and the outside Suffer a larger tensile stress.
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