Hysteretic Characteristic Curve Monitoring and Finite Element Analysis in Nondestructive Testing of Fabricated Foundatio
- PDF / 2,575,492 Bytes
- 13 Pages / 612 x 792 pts (letter) Page_size
- 5 Downloads / 194 Views
LECTROMAGNETIC METHODS
Hysteretic Characteristic Curve Monitoring and Finite Element Analysis in Nondestructive Testing of Fabricated Foundation Pit Dengping Hua, b, c, *, Chengchao Guoa, c, and Xuanxuan Chud aSchool
of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275 China School of Architecture and Civil Engineering, Huizhou University, Huizhou Guangdong, 516000 China cGuangdong Engineering Technology Research Center for Underground Space Development, Sun Yat-sen University, Guangzhou, 510275 China d Nottingham Transportation Engineering Centre, Faculty of Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom *e-mail: [email protected] b
Received February 7, 2020; revised April 29, 2020; accepted May 6, 2020
Abstract—In this paper, Strain gauge monitoring and strain gauge monitoring were compared, the underground structure health monitoring system was adopted. Based on the monitoring instrument, lateral displacement and deformation of the underground prefabricated structure was mainly measured. Through the analysis on the monitoring data, the deformation was small, which is in good agreement with that of the finite element analysis of the underground fabricated structure. The hysteresis characteristic curve of the steel panel–polymer composite structure with different thickness and scale was obtained. The experimental results show that the hysteresis characteristics of the composite structure attenuated with the length-to-thickness, whilst the load-bearing capacity of the steel panel–polymer structure increased. The increase in the thickness of the polymer layer enhanced the flexibility of the composite structure and with larger length-to-height ratios, the composite structure exhibited larger cross-section area for bearing the load. Through the analysis of the underground assembled structure monitoring data, it is concluded that the thicknesses of the steel panel and the polymer layer were more suitable to be designed at about 6 and 20 mm respectively. The economics of materials were considered, and it will also provide a theoretical basis for the development and utilization of underground prefabricated structures. Keywords: hysteretic characteristic curve, monitoring, nondestructive testing, underground structure, steel panel–polymer composite structure DOI: 10.1134/S1061830920090041
1. INTRODUCTION For some sandwiched composite structures, they can be composed of body core materials, e.g., polyurethane, which can form a good functional structure within some strong bonding structures [1, 2]. For traditional polyurethane materials, they are featured by light weight, simple structure and higher strength than other materials. Besides, polyurethane polymer materials also include various types, e.g., corrugated sheets, nanomaterials, grid interlayer, honeycomb panels, lattice material and three-dimensional truss interlayer [3, 4]. In terms of underground space structures, polymer has also been widely used in concrete engineering [5]. The underground excavation
Data Loading...
