层析成像技术检测钢筋混凝土框架柱的试验研究  

Experimental Research on Tomography Technology to Measure the Reinforced Concrete Frame Column

作　　者：邓龙龙 邓燕华 熊龙[2] 穆新盈 史路军[2] DENG Longlong;DENG Yanhua;XIONG Long;MU Xinying;SHI Lujun(Guangzhou City Guangzhou Engineering Construction Supervision Co.,Ltd.,Guangzhou 510075,China;Guangdong Songshan Polytechnic,Shaoguan 512126,Guangdong,China;Jiangxi College of Construction,Nanchang 330200,China)

机构地区：[1]广州市广州工程建设监理有限公司,广州510075 [2]广东松山职业技术学院,广东韶关512126 [3]江西建设职业技术学院,南昌330200

出　　处：《能源研究与管理》2023年第4期163-168,共6页Energy Research and Management

基　　金：2023年度广东省普通高校重点领域专项“低矮房屋洪灾破坏机理的大涡模拟研究”(2023ZDZX4093);2021年度江西省教育厅科技类重点项目“钢筋混凝土叠合梁板交角处装配式模板系统开发与应用”(GJJ215301)。

摘　　要：为查明钢筋混凝土框架柱内部缺陷和混凝土强度,利用层析成像技术对其进行检测,同时对柱混凝土强度进行回弹和取芯,以进一步验证层析成像技术推断混凝土强度的适用性和准确性。研究结果表明:1)层析成像技术能获得构件截面上各点声波波速,通过分析波速准确地锁定质量缺陷的位置、范围及占比,但所判定的质量缺陷属于相对质量缺陷,不能直接作为判断构件承载力的依据,必须通过混凝土回弹和载荷试验等方法进一步验证。2)依据平均波速推测的混凝土强度值为回弹值的65%~70%、取芯检测值的80%~85%,所推测的混凝土强度值偏低,具有一定的安全储备,且反映的是截面混凝土平均强度,具有重要参考价值。3)虽然层析成像技术检测探测构件内部缺陷具有明显优势,但仅适用于定型分析,用于推测混凝土强度时准确性较差,建议联合回弹等其他方法。It has been carried out Computerized Tomography method to measure the internal defects and concrete strength of reinforced concrete frame column.and the strength of column concrete is detected by rebound and coring methods to test the adaptation and accuracy of tomography technology in inferring concrete strength.Research shows that:1)It can make sound wave velocity at any point on the component cross-section by tomography technology,and accurately lock the location,scope,and proportion of quality defects by analyzing changes in wave velocity.It cannot put quality defects as an evaluation standard for the bearing capacity of components because the determined quality defect belongs to a relative quality defect,and there must be carried out some methods such as concrete rebound and load testing to further test its bearing capacity.2)The inferred concrete strength value based on average wave velocity is about 65%-70%of concrete rebound detection value,and 80%-85%of the core detection value,and it is safe for the inferred concrete strength value is lower than the measured value.It is the average strength of cross-section concrete,which has important reference value.3)Although tomography technology has obvious advantages in detecting internal defects in components,it is only suitable for qualitative analysis,and when it is used to estimate the strength of concrete,the accuracy is poor,it is recommended to use other methods such as combined rebound.

关 键 词：超声波 混凝土回弹 声速与波幅 混凝土强度 

分 类 号：TU192[建筑科学—建筑理论]