近接工程建设荷载的数字孪生试验方法  

Digital twin-based experimental method for construction loads of adjacent works

作　　者：张超[1,2,3] 刘拯安[1] 郎志雄 陈仁朋 Zhang Chao;Liu Zheng’an;Lang Zhixiong;Chen Renpeng(College of Civil Engineering,Hunan University,Changsha 410082,China;Research Center for Advanced Underground Space Technologies of Hunan University,Hunan University,Changsha 410082,China;Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南大学地下空间开发先进技术研究中心,湖南长沙410082 [3]湖南大学建筑安全与节能教育部重点实验室,湖南长沙410082

出　　处：《土木工程学报》2022年第7期121-128,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(52090082,51938005)。

摘　　要：近接工程建设荷载是指城市近接工程施工扰动对既有地下结构的附加荷载作用。该荷载作用可诱发既有地下结构损伤甚至破坏,威胁城市安全,但其发展规律尚不明确。明确该荷载作用需探明近接工程-地层-既有结构三者之间的动态耦合机制,尚缺乏行之有效的试验方法。文章提出一种近接工程建设荷载的数字孪生试验方法。该方法融合数字孪生技术和混合试验技术,克服了传统混合试验技术的数值模型保真性问题,实现了近接工程建设荷载的室内试验研究。此外,通过两个交互模块实现了施工现场物理空间、数字孪生体以及地层结构物理模型试验之间的数据交互,进而建立了数字孪生试验方法的系统架构。利用该系统架构开展工程案例分析,初步验证了其可行性。Construction load of adjacent works is the additional load imposed on existing underground structures due to the disturbance of the adjacent works construction.Such load may cause structural damages or even failure of existing underground structures,threatening the urban safety.However,it is still unclear how the construction load of adjacent works evolves.To probe this problem,it is required to uncover the coupling mechanism among the adjacent works,stratum,and existing structures,but an effective experimental method is still unavailable up to now.Hence,a digital twin-based experimental method was proposed for construction loads of adjacent works.In this method,the digital twin technology and hybrid simulation technology are combined to overcome the difficulty in fidelity of numerical model in traditional hybrid simulation technology,so that the laboratory investigation for the construction loads of adjacent works can be realized.Moreover,two interactive update modules were developed for data exchange among the physical space of the construction site,the digital twin,and the physical model test of stratum structure.Furthermore,a system architecture was established for the digital twin-based experimental method.With the proposed system architecture applied to the project cases,its feasibility is preliminarily validated.

关 键 词：近接工程建设荷载 地下结构 数字孪生技术 混合试验 物理模型试验 

分 类 号：O242.21[理学—计算数学] TU317.1[理学—数学]