砌体结构损伤检测的脉动法

Pulsating method of testing masonry buildings

应用脉动法测到的信号分析结构的固有频率和振型,利用作者提出的改进的单纯形法来识别结构刚度。根据识别的刚度矩阵,利用结构刚度与层间抗压抗剪强度、砂浆强度之间的关系,则可求得砌体的强度,从而达到对砌体结构进行损伤检测和安全性评定的目的。对某七层砌体结构进行实测,结果表明该方法能够比较准确地对砌体结构进行损伤检测和安全性评定。

The frequencies and vibration modes of structures are analyzed with pulsating method and structural stiffness is identified with modified simplex method, which is presented by authors. According to the relationship among structural stiffness, structural compression resistance, shear strength, and mortar strength, the masonry strength and mortar strength are obtained. And then, the quality and safety of masonry buildings are evaluated. Finally, a sevenstoried masonry building is tested with this method and the results show that this method can well evaluate the quality of masonry buildings.