王 卓
利用自振周期进行混凝土梁损伤程度识别的试验验证
王 卓
摘 要:对混凝土梁式结构的健康状况进行检测鉴定,首先需要掌握其系统参数关于结构损伤的演化规律,以便进行有的放矢的检测和得到可靠的鉴定结果。本文以混凝土简支梁为例,通过静力加载试验模拟梁的损伤累积过程,通过突加荷载试验跟踪梁自振周期随加载损伤等级的变化,深入分析了这些变化的发生机理,并提出了一种基于自振周期的结构损伤程度识别指标。
Abstract: For the detection and evaluation of concrete beam structure, the evolution rule of its system parameters about structure damage should be grasped firstly. Then, the results of detection and evaluation may be reliable. In this paper, taking a simple supported concrete beam as an example, the accumulated damage of the beam is simulated by a static loading test, and the change of natural vibration period with loading damage is tracked by a shock loading test. The mechanism of the changes is analyzed, and an identification index of damage severity based on natural vibration period is presented.
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