Bending and Pressure of Hydraulic Concrete in High and Low Temperature Coupled Fields
In order to study the influence characteristics of bending and pressure characteristics of hydraulic concrete main materials in the second main canal reinforcement project in Lailong Irrigation District,mechanical tests under high and low temperature physical actions were designed and carried out,and the effects of high and cold physical actions on the strength and strain of concrete samples were analyzed.The test results showed that with the increase of high temperature,the higher the flexural strength first increased and then decreased,while the compressive strength increased uniformly,but the latter was less sensitive to the effects of high temperature than the former.Under the action of high-temperature physics,the fracture characteristics of bending strain gradually transitioned from strain softening to hardening,but the compressive strain always assumed strain brittleness.The experimental research showed that with the increase of negative freezing temperature,both bending stress and compressive stress increased in isotropy.However,the former was more affected by low temperature than the latter,and the compressive strain was greater under low temperature.Each step of negative freezing temperature increased by 10℃,bending and compressive strength could be increased by 27.6%and 9.5%respectively.This paper can provide a reference for the systematic research on the flexural and compressive characteristics of hydraulic concrete and mechanical experimental design.
physical actionhydraulic concretethree point bendingdynamics test
万方数据
维普
