摘要
传统加权方法通常依据少量的结构损伤模式给出固定的加权系数,难以适用大量不同损伤模式下结构内力重分布时构件损伤加权关系的时变问题,而具有状态实时更新能力的网络方法理论上可以实现结构损伤后非线性内力重分布时内力传递的网络更新。为此,采用有向赋权复杂网络理论提出一种框架结构的地震损伤评价方法,基于构件之间传力方向建立有向复杂网络,再依据构件线刚度对有向复杂网络进行赋权,进而采用有向赋权复杂网络对结构传力路径进行定义,并明确网络最短传力路径,利用网络最短传力路径与结构抗侧刚度确定结构网络效率参数,通过地震前后结构网络效率的变化程度进行结构损伤评价,最后与传统损伤评价方法进行不同损伤模式下结构算例的对比验证。结果表明:所提出方法可反映地震下结构损伤程度的发展和损伤模式的变化,网络最短传力路径和结构网络效率具有可更新性,能够准确量化评价不同损伤模式的损伤程度,相比传统加权方法,结构损伤程度评价准确度提高约32%,有效解决了传统加权方法适用性差的问题。
The traditional weighted method often gives a fixed weighted coefficient based on a small number of structural damage modes,making it difficult to apply to the time-varying problem of components damage weighted relationship when the internal force redistribution of the structure under a large number of different damage modes.The network method with real-time state update capability can theoretically realize the network update of internal force transmission when nonlinear internal force redistribution after structural damage.In this paper,a seismic damage evaluation method for frame structures was proposed by using the directed weighted complex network theory.A directed complex network was established based on the direction of force transmission between components.Then the directed complex network was weighted according to the linear stiffness of the components.Furthermore,the directed weighted complex network was used to define the structural force transmission path and clarify the shortest force transmission path of the network.The structural network efficiency parameters are determined by using the shortest force transmission path of the network and the lateral stiffness of the structure.The structural damage evaluation was carried out by the change degree of structural network efficiency before and after the earthquake.Finally,the structural examples under different damage modes were compared and verified with the traditional damage evaluation method.The results show that the proposed method can reflect the development of structural damage degree and the change of damage mode under earthquake.The shortest force transmission path of the network and the efficiency of the structural network are renewable different damage modes.Compared with traditional weighting methods,the accuracy of structural damage degree evaluation is improved by about 32%.It can accurately quantify the damage degree of different damage modes.It effectively solves the problem of poor applicability of traditional weighting methods.
作者
陆剑峰
李祚华
滕军
LU Jianfeng;LI Zuohua;TENG Jun(School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;Guangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering,Shenzhen 518055,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第S02期60-73,共14页
Journal of Building Structures
基金
国家自然科学基金项目(51978224)
广东省自然科学基金(2022A1515010403)
深圳市科技计划基础研究项目(JCYJ20200109112803851)
深圳市可持续发展科技专项项目(KCXFZ202002011010039)。
关键词
有向赋权复杂网络
最短传力路径
网络效率
结构地震损伤
损伤模式
directed weighted complex network
shortest force transmission path
network efficiency
structural seismic damage
damage modes
作者简介
陆剑峰,出生于1993年,男,博士研究生,主要从事建筑结构抗震韧性等研究。email:19B954010@stu.hit.edu.cn;通信作者:李祚华,出生于1978年,男,工学博士,教授,主要从事结构抗震、应力检测等研究。email:lizuohua@hit.edu.cn
