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The Theory and Application Research on the Magnetic Non-destructive Testing of a Safe State for a Defect Sensitive Structure Sheliang Wang 1,a,Xiaoyu Miao 1,2,b,Yujiang Fan 1,c 1 School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an, 710055, Shaanxi, China; 2 School of Civil Engineering, Chang'an University Xi’an, 710061, Shaanxi, China; a email:wangshel@yahoo.com.cn, bemail:miaoxy178@163.com, cemail:fanyujiangchd@163.com Key words: ferromagnetic material; defect sensitive structure; magnetic permeability; stress; safe testing Abstract: When a steel etc. a ferromagnetic material is subjected to the external loads, the internal force will develop, that is, stress will develop inside the material, which will lead to a corresponding change in the magnetic permeability of this material when magnetized.
In this paper, according to this unique property of the ferromagnetic material, in the light of the mainly stressed and deformation characteristic of a long span steel structure etc. defect sensitive structures, by the use of stress sensitivity of magnetization, a mathematical physical model of relationship between the change in the magnetic permeability and stress is studied and put forward when a ferromagnetic component is under the action of a simple stress, a linear dependency relation of the component’s stress and its permeability is obtained, and the fundamental theory of the magnetic non-destructive testing of a safe state and its engineering application method is also established for a long span steel structure etc. defect sensitive structures, which provides a definite basis for guaranteeing safety of this kind of structures.
Both these results exhibit a good consistence, which demonstrates that the research and the application of the non-destructive safe testing method for a defect sensitive structure based on the magnetic effect is feasible and valid and the future will see a certain engineering application prospect in this research and this testing method.
Introduction With the continuous advances of science and technology and the high-speed development of the social economy, mankind has been becoming more and more strict with requirements of serviceability and safety for an important defect sensitive structure or a large scale and a long span complicated engineering structure.
Therefore, in order to guarantee normal use and safe of the engineering structure, it is of necessity to carry out a real time in-line testing or monitoring on the health state of structures so as to discover the hidden defects and damages existing in the structure as early as possible, and to take corresponding guarding and repairing measurements, or a disastrous result will accrue to structures.

Theoretical and Experimental Research on Load Transfer of Anchorage Stress in Soil Anchor Jing Cao1,a, XiaoYong Wang1,b, HuaiXi Zuo2,c, HaiMing Liu1,d, WenWei Zheng 2,e 1 Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China 2 Yunnan branch of Jian Yan Foundation Engineering Co.
Journal of American Concrete Institute, 1967, 64(11): 711—721 [2] Chinese Institution of Soil Mechanics and Geotechnical Engineering-China Civil Engineering Society.
Chinese Journal of Geomechanical Engineering, 2001, 23(6): 696—699
Rock-soil Anchoring Engineering Technology [M].
Chinese Journal of Geomechanical Engineering, 1999, 21(6): 662—665

Application of infrared method for water detection in karst tunnel Xin-Ming GUO1,a, Ge CUI1,b, Ya-Peng FU1,c, Yong FANG2,d 1Master candidate, Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Dept. of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China 2Associate Professor, Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Dept. of Civil Engineering , Southwest Jiaotong University, Chengdu 610031, China aemail: xinmingguo@126.com, bemail: cuige114@126.com, cemail: fyp19900328@foxmail.com, demail: fy980220@swjtu.cn Keywords: Large section; karst tunnel; advanced geological prediction; water detection; Abstract.
By analyzing the predicted results and comparing it with the situation of excavation, the instrument is feasible as to water rush in karst areas and infrared detection technology has a great opportunity to be applied in the tunnel engineering under complex geological conditions.

Optimization of the Impact of Dune Sand, Recycled Rubber Aggregates, and Clay Brick Waste on Eco-Mortar Mechanical Strength by the Taguchi Method KAAB Mohamed Zohaïr1,a*, ATHAMNIA Brahim2,b, DJEDID Tarek3,c and KHELAIFA Hamad1,d 1Hydraulic and Civil Engineering Department, University of El Oued, BP 789, El Oued 39000, Algeria 2Civil Engineering Department, University of Tebessa, Route de Constantine, Tebessa 12002, Algeria 3Laboratory LEVRES, Hydraulic and Civil Engineering Department, University of El Oued, BP 789, El Oued 39000, Algeria a*kaab-mohamed-zohair@univ-eloued.dz, bbrahim.athamnia@univ-tebessa.dz, c tarek-djedid@univ-eloued.dz, dkhelaifahamad@gmail.com *Corresponding author Keywords: Dune sand, Rubber aggregates, Clay brick waste, Eco-mortar, Mechanical strength, Taguchi method.
It was developed by Japanese engineer and statistician Genichi Taguchi.
Abdelkader, The Effect Of Recycled Rubber Aggregates And Dune Sand Of El-Oued Region On The Compressive Strength Of Cementitious Mortar: Optimization Using Taguchi Method, Stavební obzor-Civil Engineering Journal. 32 (2023) 203-214
Krobba, Theoretical and Experimental Flexural Behavior of Steel Bars-Reinforced Concrete Beams Strengthened with Cementitious Mortars Based on Dune Sands, International Journal of Civil Engineering. 19 (2021) 623-634
Krobba, Sulfate Resistance of Cementitious Mortar Based on Dune and Alluvial Sands in Hot Region, Iranian Journal of Science and Technology, Transactions of Civil Engineering. 45 (2021) 697-706

Dom Bosco - Campos dos Goytacazes, 28030-130, RJ, Brazil 2 UENF - State University of the Northern Rio de Janeiro, LECIV – Civil Engineering Laboratory; Av.
Alberto Lamego, 2000, 28013-602, Campos dos Goytacazes, Brazil 3Department of Materials Science, Military Institute of Engineering - IME, Praça General Tibúrcio, 80, Praia Vermelha, Urca, RJ, CEP 22290-270, Urca, Rio de Janeiro, RJ, Brazil.
The modern concepts of civil construction for building with a maximum of 5 stores rely on structural blocks to support part of the load.

Improved Fault Diagnosis Method for Aeroaccessory Gear Jun Pi 1, a Zhi-wei Li 2,a Guo-hua Yan 2,a 1SIAE,Civil Aviation University of China 2Aeronautic Mechanics College,Civil Aviation University of China apijun8@163.com, Keywords: gear fault, Wigner-Viller distribution,singularity value decomposition, hybrid method Abstract.
Journal of Mechanical Engineering.
Journal of Vibration Engineering, 2006,19(3):399-403 [3] Bing Li, Peilin Zhang, Shubao Liang,Guoquan Ren “Feature Extraction and Selection for Fault Diagnosis of Gear Using Wavelet Entropy and Mutual Information” ICSP 2008, pp,2846-2850
IMACS Multiconference on Computational Engineering in Systems Applications(2006).pp.1822-1827

Study of Post-fire Behavior of a Profiled Sheet-Ceramsite Concrete Composite Floor Xintang Wang1,a, Ming Zhou1,2 ,c and Pingxin Sun1,d 1Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo, China 315211 2College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an, China 710055 awxt196322@126.com, bzhouming1426@163.com, cjackeay@163.com Key words: Post-fire behaviour, Ceramsite concrete, Composite floor, Bearing capacity Abstract.
References [1] Guo-qiang Li, Lin-hai Han and Guo-biao Lou, in: Fire Resistant Design of Steel and Steel-Concrete Composite Structures, edited by China Architecture & Building Press, Peking (2006) (In Chinese) [2] Shouchao Jiang, in: Research on Fire Resistant Theory and Experiment of Steel-Concrete Composite Floor, edited by Doctoral Dissertation, Tongji University (2001) (In Chinese) [3] Xiaodong Li, Yuli Dong and Ligang Chen: Building Technology Vol.35 (2004), p.252 (In Chinese) [4] Yankun Zhang, Haijiang Jin and Xiaoruan Song: Proceedings of the Sixteen National Conference on Structural Engineering (2007), p.238 [5] Yankun Zhang, Haijiang Jin and Demin Jiang: Journal of North China University of Technology Vol.20 (2008), p.80 (In Chines)

Test Research on Strengthening in-service Damaged Truss with Prestressed Cable Zhang Jian-wei1,2,a, Meng Yong-wang1,b, Zhang Shi-hong1,c 1 School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, China 2 College of Water Conservancy & Environmental Engineering, Zhengzhou University, Zhengzhou 450001, China.
Introduction A variety of truss has been adopted at the top of the support structure of many civil and industrial buildings, such as wood truss, steel truss, etc.
Engineering practice shows that, prestressed technology is a very effective way of strengthening[3][4][5].

Research and Development on Similarity Principle of Model Pile WANG Xinquan1, a, ZHANG Shimin1,b, LIAO Juan1,c, HUANG Yingsheng1,d 1Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China 2School of civil engineering, Henan Polytechnic University, Jiaozuo 454000, China awangxq@zucc.edu.cn, bzhangsm@zucc.edu.cn, cliaoj@zucc.edu.cn , dhuangys@zucc.edu.cn Keywords: Similarity Principle. model test. model pile.
Foundation Engineering Design Theory[M]. first edition.

A Finite Element Simulation of Mold Filling Process in Resin Film Infusion based on Material Properties and Mechanics Properties Mei Yang1, a, Xiao Liu2,b 1 College of civil and architecture engineering, Hebei polytechnic university, Than Shan, 063009, China 1 College of civil and architecture engineering, Hebei polytechnic university, Than Shan, 063009, China aywdym2002@126.com, bliuxiao@heut.edu.cn Keywords: Resin film infusion, Finite element method, Filling Processt.
Tamma, Polymer engineering and science, Vol.39(1999), p.26