【摘要】 以小湾拱坝模型为例,针对试验模型在冲击荷载作用下的破坏问题,采用数字图像相关技术分析了受冲击后拱坝模型下游面的全场变形。在顺河向水平冲击荷载作用下,较小荷载作用时坝体未发现明显裂纹,但经数字图像相关分析发现局部已严重损伤;在较大荷载作用后坝体发生整体失效破坏,破坏与损伤位置吻合。研究结果表明,数字图像相关技术可用于大坝损伤检测和监测,且精度较高。更多还原

【Abstract】 Digital image correlation technique is conducted to study the damage of Xiaowan arch model under impact load.Full-field deformation of downstream face of arch dam is measured.After small impact load with direction along the river,there is no distinct crack on the face of dam.But serious damage appeared at local position with high strain measured by digital image correlation technique;Under action of large impact load,the whole failure is occurred at the site of cracking.This research indicates that digital image correlation technique can be used to detection and monitoring of the dam damage with high precision.更多还原