摘要
静载试验是获得结构真实特性的重要方法和途径,具有直观、可靠的特点。本文基于静载试验实测的挠度、转角和曲率,建立目标函数,通过优化的方法,实现结构分段截面抗弯刚度参数的识别。研究了优化目标函数的建立、优化算法的选取与实现;通过数值算例和一片简支梁静载试验实例分析,对方法的正确性与可行性进行了验证,所得结果可用于结构损伤识别和安全性能评估。
Static load test of structure is straightforward and reliable, and it is an importance method to gain structural parameters of the actual structure. In this paper, the identification of structural segment flexural rigidity parameters is studied. It is realized by an optimization method based on displacement, angular distortion and curvature responses under a static load test. Establishment of an appropriate optimization objective function, selection of an optimization algorithm and realization of the algorithm are described in details. The correctness and feasibility of the method are validated numerically and experimentally by an example of a simply supported beam under a static load test. The method proposed in this paper can be applied to the identification of structural damage and evaluation of structural security performance.
出处
《实验力学》
CSCD
北大核心
2007年第5期483-488,共6页
Journal of Experimental Mechanics
关键词
参数识别
抗弯刚度
静载试验
优化
structural parameter identification
flexural rigidity
static load test
optimization
