Experimental and numerical simulation study on compressive mechanical properties of Tibetan rubble masonry
The uniaxial compression performance of two groups of 8 typical Tibetan rubble prism specimens was anayzed by experiments and PFC2D two-dimensional numerical calculation.The basic mechanical parameters such as the whole process of compression failure,the full stress-strain curve and elastic modulus of the prism were obtained.It is found that the compression process of Tibetan rubble masonry presents stage change and obvious nonlinear behavior.The results show that PFC2D two-dimensional numerical simulation can reproduce the compression failure pattern and crack development of rubble masonry well.Adding gravel into clay can increase the bearing capacity by 23%and effectively change the instability failure mode of the specimen.The tensile strength of stone and elastic modulus of clay are the key factors affecting the initial crack strength and peak strength of specimens.A new method for evaluating the compressive capacity of Tibetan rubble masonry in engineering was provided.
Tibetan rubble masonrycompression teststress-straindiscrete element numerical simulation
NETL
NSTL
万方数据
