粉煤灰混凝土简支梁损伤评估研究

Study on Damage Assessment of Simple Supported Concrete Beams with Fly Ash

针对不同掺量的Ⅱ级粉煤灰对混凝土力学性能影响的问题,采用实验方法,进行了粉煤灰混凝土抗压强度实验,Ⅱ级粉煤灰的掺量分别为10%、15%、20%、25%和30%。后期进行了三组粉煤灰混凝土简支梁的受弯实验,通过记录和观察梁在集中荷载作用下受弯和受剪的情况,对实验数据进行综合分析,了解粉煤灰的掺入对混凝土简支梁力学性能的影响。通过实验发现在一定范围内,粉煤灰的掺入能提高混凝土的抗压性能和抗弯性能,不会对混凝土的力学性能带来不利的影响。

In view of that influence of the different level of fly ash on the mechanical properties of concrete,the experimental method is adopted. In the experiment of compressive strength of fly ash concrete,the content of grade II fly ash is 10%,15%,20%,25% and 30% respectively. Late in the three groups of fly ash concrete beam bending experiment,through the records and observation of beam under concentrated load bending and shear situation,comprehensive analysis of the experimental data,understand the incorporation of fly ash on the mechanical properties behavior of concrete beam. It is found that in a certain range,the incorporation of fly ash can improve the compressive performance and bending performance of concrete,and will not adversely affect the mechanical properties of concrete.