基于弹性模量的高强混凝土抗压强度预测模型

Prediction Model for Compressive Strength of High-Strength Concrete Based on Elastic Modulus

摘要:

根据混凝土峰值压应力下砂浆和粗骨料的承载状态，提出粗骨料和砂浆的受力假定，基于弹性模量建立了先串联后并联的高强混凝土抗压强度预测模型，并采用C60高强混凝土进行了验证。结果表明，花岗岩、白云岩粗骨料混凝土抗压强度的预测值与实测值误差在10%以内，该模型可为预应力混凝土构件早期张拉龄期的确定及后期结构变形控制提供参考。

Abstract:

Based on the load-bearing states of mortar and coarse aggregate under the peak compressive stress of concrete， hypotheses regarding the stress distribution between coarse aggregate and mortar were proposed. A prediction model for the compressive strength of high-strength concrete， featuring series-parallel connection based on the elastic modulus， was established and validated using C60 high-strength concrete. The results indicate that the error between the predicted and measured compressive strengths of concrete with granite and dolomite coarse aggregates is within 10%. This model can provide a reference for determining the early tensile age of prestressed concrete members and controlling structural deformation in the later stages.