混凝土坝应力应变监测仪器的应用研究  

Application Study of Instruments for Stress Strain Monitoring on Concrete Dam

作　　者：彭虹[1] 

机构地区：[1]国网电力科学研究院,江苏南京210003

出　　处：《水电能源科学》2014年第9期178-182,共5页Water Resources and Power

摘　　要：鉴于大坝应力应变监测的重要性,探讨了大坝应力应变监测中应变计、应力计和压应力计的实际应用问题,比较了应变计、应力计实测资料,发现应变计实测资料可信度更高;指出在应变计资料整编计算中,基准值选择、无应力计资料的正确获取的重要性;通过分析无应力计资料,发现现有无应力计结构不够合理,进而结合有限元计算,提出了新型无应力计结构改进方案;论述了应用弹性理论推求混凝土无应力应变的方法,并通过实例验证了方法的有效性;分析了埋设在混凝土中的应变计、压应力计与埋设在缝面(建基面、诱导缝等)的压应力计实测结果的异同,给出了现场试验研究压应力计实测资料可用性问题的建议。It discusses several question about strain meter and pressure cell for stress strain monitoring in dams.The monitoring information of strain meter and pressure cell is compared.It indicates that the reliability is higher for the former.The essentiality for choice of benchmark value and information obtaining accurately of no-stress strain has been indicated.The structure of no-stress meter is irrationality via information analysis.The improvement of structure of new nostress meter is put forward with FEM.It discusses the method that elasticity theory is used to calculate no-stress strain of concrete,and the effectiveness of the method is verified by application example.The similarities and differences of monitoring results among strain meter and pressure cell embedded concrete and pressure cell embedded joint（bedrock or abduction joint etc）.The suggest of developing field investigation has been put forward for the usability of monitoring information with pressure cell.

关 键 词：混凝土坝 应力应变监测 应变计 无应力计 压应力计 

分 类 号：TV698.1[水利工程—水利水电工程]