喷射高性能水泥复合混凝土加固石拱桥节段模型试验

为了解喷射高性能水泥复合混凝土钢筋网加固石拱桥的受力机理、承载力提高幅度和破坏形态，通过3组用喷射高性能水泥复合混凝土钢筋网加固的石拱桥节段试件以及1组对比试件在分级加载下的轴压试验，探究了不同加固方式和加固层厚度对加固性能的影响。试验结果表明，加固后的石砌体开裂荷载能提高103.1%~119.8%，极限荷载提高21.2%~36.4%，喷射高性能水泥复合混凝土是一种有效的加固方法，可供工程加固设计时参考。

Experimental Investigation on Truncated Model of Stone-arch Bridge Strengthened with Injection High Performance Cement Composite Concrete

In order to investigate the capacity mechanism,failure mode and capacity elevated degree of stone-arch bridge,two groups of compressive specimens of stone masonry strengthened by injection high-performance cement composite concrete and one group of contrastive specimens were made for the axial compression test. The strengthening effects of the thickness of concrete on the strengthened stone masonry were analyzed. The experiment results showed that the cracking capacity of strengthened stone masonry can be greatly improved by 103.1%~119.8%,and the ultimate capacity can also be improved by 21.2%~36.4%.Strengthening stone-arch bridge with injection high-performance cement composite concrete is an effective method which can be employed to the strengthening engineering.