加热后花岗岩在不同冷却方式下轴向受压破坏形态研究  

Failure Modes of Heated Granite Under Axial Compression Under Different Cooling Methods

作　　者：赵广臣 张永生 胡新萍 ZHAO Guangchen;ZHANG Yongsheng;HU Xinping(Department of Civil and Architectural Engineering,Shanxi Institute of Technology,Yangquan 045200,China)

机构地区：[1]山西工程技术学院土木与建筑工程系,山西阳泉045200

出　　处：《洛阳理工学院学报（自然科学版）》2022年第2期37-40,52,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：山西省高等学校教学改革创新项目(J2018209);阳泉市重点研发计划项目(2020YF043);山西工程技术学院“1331工程”校内培育项目(2019XF-03).

摘　　要：为了分析冷却方式对加热后花岗岩破坏形态的影响,对花岗岩试样进行轴向压缩试验,结论如下:(1)当热处理温度在某一范围内时,加热和冷却导致的损伤分布相近,破坏形态相似。当超过某个温度阀值时,加热和冷却导致的损伤分布会发生变化,导致了破坏形态的改变。(2)热致损伤和冷却损伤共同影响花岗岩的破坏形态。当热处理温度达到一定值(200℃),损伤分布才会取代结构面分布,成为影响破坏形态的主要因素。当热处理温度超过300℃时,由于快速冷却损伤占主导地位,导致快速冷却花岗岩试样与慢冷花岗岩试样破坏形态不同。To analyse the effect of different cooling methods on the failure modes of heated granites,the axial compression experiments were carried out on granites.The analysis showed that:(1)Within a certain range of heat treatment temperature,the damage distribution and failure modes caused by heating and cooling are similar.When a certain temperature threshold is exceeded,the damage distribution caused by heating and cooling will change,resulting in the failure model change.(2)Thermal damage and cooling damage together can affect the failure mode.When the heating treatment temperature reaches a certain degree(200℃),the damage distribution will replace the structural surface distribution and become the main affecting factor.When the heat treatment temperature exceeds 300℃,the rapid cooling damage dominates,results in different failure modes between the rapid and slow cooling granites.

关 键 词：花岗岩 破坏形态 冷却 

分 类 号：TU452[建筑科学—岩土工程]