高温后高性能混凝土和细晶粒钢筋间粘结性能

On Bond Behavior Between HPC and Fine Grain Steel Bar After Elevated Temperatures

摘要:

配制了C100高性能混凝土，制作了标准立方体试块，并选用500 MPa级细晶粒钢筋制作了中心拔出粘结试件.分别对立方体试块和拔出试件进行了200，400，600，800 ℃的高温试验，完成了高温后的抗压强度试验和拔出粘结试验.基于试验结果，分析了高温作用对高性能混凝土抗压强度和粘结强度的影响，研究了高温后高性能混凝土抗压强度和粘结强度的关系，并通过与普通混凝土高温后粘结性能的对比，分析了高温后高性能混凝土和细晶粒钢筋间粘结性能的特点.

Abstract:

Standard cube compressive specimens and central pullout test specimens are cast with C100 highperformance concrete(HPC).In the pullout test specimen,fine grain steel bars with strength grade of 500MPa are applied.After being exposed to 200 ℃,400 ℃,600 ℃ and 800 ℃,the compressive strength of the cube specimens are tested and the loadslip curves between HPC and fine grain steel bars are recorded.Based on the test results,the bond behavior between HPC and fine grain steel bars is analyzed.Finally,the difference of the postfire bond behavior between normal concrete and highperformance concrete is discussed.