基于实测挠度、转角和曲率的细长梁分段抗弯刚度识别研究
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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.
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.
引文
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[11]邓苗毅.基于静载试验的梁桥结构损伤系统识别研究.郑州:郑州大学硕士学位论文,2003(Deng Miaoyi.Studyof damage system identification of beam system bridge based on static load test.Master’s thesis,ZhengzhouUniversity,2003(in Chinese))
[2]赵玲,李爱群,陈丽华.基于结构测试的损伤诊断方法研究[J].东南大学学报(自然科学版),2003,33(5):610~612(Zhao Ling,Li Aiqun,Chen Lihua.Structure damage identification based on structure testing.Journal ofSoutheast University(natural science edition),2003,33(5):610~612(in Chinese))
[3]崔飞,袁万城,史家钧.基于静态应变及位移测量的结构损伤识别法[J].同济大学学报,2000,28(1):5~8(CuiFei,Yuan Wancheng,Shi Jiajun.Damage detection of structures based on static response.Journal of TongjiUniversity,2000,28(1):5~8(in Chinese))
[4]宗周红,任伟新,阮毅.土木工程结构损伤诊断研究进展[J].土木工程学报,2003,36(5):105~110(ZongZhouhong,Ren Weixin,Ruan Yi.Recent advances in research on damage diagnosis for civil engineering structures.China Civil Engineering Journal,2003,36(5):105~110(in Chinese))
[5]邓苗毅,徐建国,赵斌.钢筋混凝土梁结构状况的系统识别方法[J].郑州轻工业学院学报(自然科学版),2004,19(2):34~36(Deng Miaoyi,Xu Jianguo,Zhao Bin.System identification method for reinforced concrete beamstructure status.Journal of Zhengzhou Institute of Light Industry(natural science edition),2004,19(2):34~36(inChinese))
[6]Sanayei M,Imbaro G R,McClain J A S,Brown L C.Structural model updating using experimental staticmeasurements[J].J.Struct.Engrg.,ASCE,1997,113(6):792~798.
[7]Sanayei M,Saletnik M J.Parameter estimation of structures from static strain measurement.Ⅰ:Formulation[J].J.Struct.Engrg.,ASCE,1996a,122(5):555~562.
[8]Sanayei M,Saletnik M J.Parameter estimation of structures from static strain measurement.Ⅱ:Error sensitivityanalysis[J].J.Struct.Engrg.,ASCE,1996a,122(5):563~572.
[9]Sanayei M,Onipede O.Assessment of structures using static test data[J].American Institute of Aeronautics andAstronautics Journal,1991,29(7):1156~1179
[10]Hjelmstad K D,Shin S.Damage detection and assessment of structures from static response[J].Journal ofEngineering Mechanics,1997,123(6):568~576.
[11]邓苗毅.基于静载试验的梁桥结构损伤系统识别研究.郑州:郑州大学硕士学位论文,2003(Deng Miaoyi.Studyof damage system identification of beam system bridge based on static load test.Master’s thesis,ZhengzhouUniversity,2003(in Chinese))
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