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近年来建筑火灾频发,而随着自密实混凝土在建筑工程中的广泛应用,开展自密实混凝土以及纤维自密实混凝土抗火性能的研究已变得尤为重要。针对自密实混凝土的抗火功能,研究了钢纤维、结构性PP纤维以及细PP纤维对高温作用后自密实混凝土简支梁剩余承载力的影响,并推导了一种考虑混杂纤维作用的简支梁高温后抗弯承载力计算模型,以期通过对纤维自密实混凝土构件高温后剩余承载力的量化与预测,为火灾后结构的维修和加固提供参考与依据。
In recent years, there are frequent building fires. With the wide application of self-compacting concrete in construction, the research on fire resistance of self-compacting concrete and fiber self-compacting concrete has become more and more important. The effect of steel fiber, structural PP fiber and fine PP fiber on the residual bearing capacity of self-compacting concrete simply supported beam after high temperature was studied in view of the fire resistance of self-compacting concrete. A simple support The calculation model of flexural capacity after beam high temperature is put forward in order to provide reference and basis for the maintenance and reinforcement of the structure after fire by quantifying and predicting the residual bearing capacity of fiber self-compacting concrete after high temperature.