摘要
综述了实验固体力学及其在混凝土断裂方面的研究现状.介绍了实验固体力学的一种光学测量新方法———数字电子散斑干涉法以及时间相移技术和空间载波变换技术.采用上述方法对带预制裂缝的混凝土三点弯曲梁进行了断裂特性的实验研究,测定了不同荷载作用下断裂过程区位移变化和裂缝张开口位移.将实验研究结果与有限元计算结果进行了比较,二者吻合得较好.实验研究表明,时间相移及空间载波变换数字电子散斑干涉法是进行混凝土损伤断裂特性研究的一种有效实验方法.
This paper makes a survey of the experimental solid mechanics and the current situations of the researches on it in the field of concrete fracture, and presents a new optical measurement DSPI （Digital Speckle Pattern Interferometry） and time-lapse and spatial carrier transformation technologies. Experimental researches are conducted on the fracture characteristics of precracked concrete 3-point bent beams. Determined are the displacement changes in the fracture process zone and crack opening displacement under different loads. A comparison is made between the experimental research results and finite element calculation findings, which are concordant quite well. The experimental researches show that the time-lapse and spatial carrier transformation DSPI is an effective experimental method for carrying out researches on the concrete fracture characteristics.
出处
《徐州建筑职业技术学院学报》
2006年第1期1-4,共4页
Journal of XUZHOU Institute of Architectural Technology
基金
国家自然科学基金(10272068)资助项目
