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某热轧改造EPC工程中,冷床区域用于支撑固定金属框架的柱结构采用普通硅酸盐混凝土,考虑到普通硅酸盐混凝土耐热能力有限,为了评价生产过程中高温型材进入冷床缓慢冷却过程中对混凝土柱可能产生的持续热影响,采用热辐射模拟的方法,对冷床混凝土柱受到的热辐射影响进行研究,并通过实验方法验证混凝土在高温下力学性质上的变化。基于现场模拟与实验室分析,研究和选取了经济、合理的防护措施,在后续生产过程中的监测表明防护措施有效,未出现混凝土结构受损等的不良现象。
In a hot-rolling EPC project, ordinary silicate concrete is used as the column structure for supporting the fixed metal frame in the cooling bed region. In view of the limited heat-resistance capability of common silicate concrete, in order to evaluate the slow temperature of the high-temperature profile entering the cooling bed in the production process During the cooling process, the possible thermal effects on the concrete columns were investigated. The influence of thermal radiation on the concrete columns of the cooling bed was studied by the method of thermal radiation simulation. The mechanical properties of the concrete at high temperature were verified by experimental methods. Based on field simulation and laboratory analysis, economic and reasonable protective measures were researched and selected. Monitoring during follow-up production showed that the protective measures were effective and there was no adverse phenomena such as concrete structure damage.