矿渣高性能混凝土剪力墙火灾反应试验研究

针对 3榀矿渣高性能混凝土剪力墙模型在预加轴向压力 (轴压比约为 0 .2 )作用下的火灾试验 ,研究了持荷状态下剪力墙的火灾反应与抗火性能 .通过温度 -变形曲线、温度 -压力曲线和温度场的试验研究与对比分析 ,得出了不同迎火面温度、不同受火时间、有无外掺聚丙烯纤维的矿渣高性能混凝土剪力墙的火灾反应特点 ,研究了矿渣高性能混凝土剪力墙的抗火性能 .在火灾作用下 ,高性能混凝土剪力墙表面虽然会发生龟裂、起皮和局部爆裂等现象 ,但仍具有较好的整体性、稳定性和隔热性 ;加入聚丙烯纤维可在一定程度上改善高性能混凝土剪力墙的抗火性能

Experimental Study on Fire-response of High-performance-concrete with Blast-furnace-slag Shear Walls

Three large-scale BFS-HPC (high-performance-concrete with blast-furnace-slag) shear walls are tested and studied in fire under the axial loading of approximately 20% of the ultimate concrete load capacity. The test concerns different maximum temperatures of the side exposed to fire, different time of fire exposure, and with/without polypropylene fiber. By describing and analyzing the deflection-temperature relationships, stress-temperature relationships and temperature field figures, this paper investigates the fire-response behavior of BFS-HPC shear walls under different conditions. The test results show that BFS-HPC shear wall still possess preferable integrality, stability and thermal insulation, in spite of cracking, peeling and local spalling on the fire exposure surface. It is concluded in this paper that the polypropylene fiber can enhance the fire-resistance behavior of HPC shear walls very well.