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Slenderness Sensitivity Analysis of Thin-Walled Square Steel Tubular Columns Filled with Demolished Concrete Lumps Weiwei Li1,2,*, Huifeng Zhang2 1Department of Civil Engineering, Nanyang Institute of Technology, Nanyang 473004, China 2Institute of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China Corresponding author: liweiwei1027@163.com (Li Weiwei) Keywords: DCLs; CFST; Orthogonal experiment; Sensitive; Axial bearing capacity.
The DCLs had slightly affect on the mechanical performances of slender CFST columns. the code CECS (China Association for Engineering Construction Standardization) 28:2012 was used to calculate the bearing capacity of slender CFST columns filled with DCLs under axial compression. 1.
Introduction Concrete-Filled Steel Tube (CFST) columns has been widely used in the civil engineering fields[1].
With the acceleration of global urbanization and the rapid development of civil engineering construction, a large number of abandoned concrete had been produced while building, rebuilding and expanding all kinds of buildings on a large scale, which seriously pollutes the environment.

Numerical Method and Experimental Study on the Ultimate Load Carrying Capacity of Four Tube CFST Latticed Columns Lizhong Jianga, Wangbao Zhoub and Jingjing Qic School of Civil and Architecture Engineering, Central South University, Changsha 410075, China azhouwangbao@126.com, bzhouwangbao@163.com ,Cqijingjing273@hotmail.com Keywords: CFST; Latticed Column; Ultimate Load Carrying Capacity; Theoretical Analysis; Experimental Study Abstract.
[8] Baochun Chen and Zhijin Ou: Journal of Building Structure. vol.27(2006),P.73(in Chinese) [9] KIL PATRICK A E and VIJA YA R B: ACI Structural Journal . vol .96 (1999),p.268 [10] Baochun Chen and Zhijin Ou.: China Journal of Civil Engineering. vol .40(2008), p.55 (in Chinese) [11] Lizhong Jiang, and Wangbao Zhou: Chinese Journal of Computational Mechanics. vol .27(2010),p.677(in Chinese) [12] Kawano A and Sakino K: Engineering Structures. vol .25(2003),p.607 [13] Galambos TV: Guide to stability design criteria for metal structures(John Wiley &Sons , Inc, New York 1998)
[15] Lin F J, Clauser E C and Johnston B G: Journal of the Structural Division, ASCE. vol .96( 1970) ,p.1377 [16] Baochun Chen and Zhijing Ou: China Journal Of Civil Engineering. vol .40(2007), p.32 [17] Yongqing Tu and Cong Li: Journal of Beijing University of Aeronautics and Astronautics. vol .31(2005),p.1092(in Chinese)

Key Factors Analysis on Environment Settlements in Tunnel Construction based on Rough Sets LI Weiming 1, a , DING Lieyun1, LIN Xiaojiao1, LUO Hanbin1 1 School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, 430074, China a lwm.hust@gmail.com Keywords: environment settlements, tunnel construction, key factor analysis, Rough Sets.
It is engineering significant to analyze the key factors in the tunnel construction for an acceptable environment settlements value.
Rough Sets is applied in computer science rapidly to manipulate imperfect knowledge, and soon in the other sciences and engineering.
There 22 engineering samples are collected in Table 1.
According to the rough set theory, the engineering samples pre-process should be performed firstly, i.e., continuous attribute data discretization.

An approach to fatigue reliability analysis based on the hybrid model of probability and non-probability Hai An1,2,a, wei-guang An2,b 1School of Management & Economics, Beijing Institute of Technology, Beijing, 100081, China 2 College of Aerospace & Civil Engineering, Harbin Engineering University, Harbin 150001, china aanhai@hrbeu.edu.cn, banweiguang@hrbeu.edu.cn Keywords: Fatigue reliability analysis, the hybrid model of probability and non-probability, Random variables, Interval variables Abstract.
Taking into consideration of probability and non-probability information available in engineering, a hybrid model of probability and non-probability is proposed to analyze the fatigue reliability of system according to the compatibility of measures [2] between probability reliability models and non-probability reliability models in this paper.
But sometimes few statistics samples or the lack of enough data information for some variables like in Eq.(1) is available in engineering, it is more believable for fatigue reliability of system to give the variable bounds than a mean value.
(in chinese) [4] Hu Y R, Chen B Z: Fatigue reliability analysis of ship and ocean engineering structure (Demotic Traffic Press, Beijing 1996).

Research on Thermal Stress of Subway Tunnel in Construction Period Xinming Zhao1,a, Xiaoyao Zhang1,b, Jiankui Wang1,c, Shaowei Hu2,d and Jun Lu2,e 1 Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2 Nanjing Hydraulic Research Institute, Nanjing 210003, China axmzhao@nuaa.edu.cn, b362970027@qq.com, c413543592@qq.com, dhushaowei@nhri.cn, elujun@nhri.cn Keywords: subway tunnel, concrete, construction period, thermal stress.
The distribution rule of temperature field and temperature stress field of tunnel lining concrete are studied to provide the reasonable references to design and construction of tunnel engineering.
According to engineering geological exploration report, the soil under the pit plane at 1m depth is gravelly clayey soil, its coefficient of thermal conductivity is 5400J/m∙hr∙oC, and specific heat 137800J/(kN∙oC), deformation modulus 8×106N/m2, Poisson's ratio 0.3, linear expansion coefficient 1×10-5(1/oC).
Miao, Jiuyanshan tunnel damage cause analysis and defect treatment measures, Journal of Railway Engineering Society, 78 (2003) 70-72
Ding, Highway tunnel secondary liner safety analysis, Chinese Journal of Rock Mechanics and Engineering, 23 (2004) 75-78

Numerical Simulation of Stress Wave Propagation Induced by Cut Blasting in Multi-media Yang Guoliang 1,2, Yang Renshu1,2 , Huo Chuan2, Che Yulong2 1State Key Lab of GeoMechanics and Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China; 2School of Mechanics and civil engineering, China University of Mining and Technology, Beijing 100083, China Keywords: Stress Wave Propagation; Numerical Simulation; Multi-Media; Cut Blasting Abstract.
Chinese Journal of Rock Mechanics and Engineering, 1996: 51(15):536-539
Chinese Journal of Rock Mechanics and Engineering, 2003, 22 (4):636–640
Chinese Journal of Rock Mechanics and Engineering, 2011, 30(2):224-232.

Short Overview of the Effects of Nanoparticles on Mechanical Properties of Concrete Paweł Niewiadomski1, a * 1 Faculty of Civil Engineering, Wroclaw University of Technology, pl.
The development of materials engineering, especially nanotechnology [1,3], which seems to offer great possibilities of improving both the physical and mechanical properties of this material [2], contributes to this research.
Czarnecki, Nanotechnology in building engineering (in Polish), Przegląd Budowlany 1 (2011) 40-53
Lewandowska, Engineering nanomaterials (in Polish), Wydawnictwo Naukowe PWN, Warsaw, 2011
Riahi, The effects of Cr2O3 nanoparticles on strength assessments and water permeability of concrete in different curing media, Materials Science and Engineering: A 528/3 (2011) 1173-1182

Bakhracheva, Prediction of residual life of reactor steels to ensure safe operation of nuclear power plant reactor vessels, IOP Conference Series: Materials Science and Engineering. 451(1), (2018) 012202
Khokhlov, Wear laws at elastic interaction / Russia Engineering Research. 16 (1996) 11–12
Bakhracheva, Fracture toughness prediction by means of indentation test, International Journal for Computational Civil and Structural Engineering. 9 (2013) 21–24
Trokhimchuk et al., Accident Prevention and Diagnostics of Underground Pipeline Systems, IOP Conference Series: Materials Science and Engineering. 262, (2017). 012171
New York, NY: American Society of Mechanical Engineers, (2000) [14] Moser, A.P., Buried Pipe Design. 2nd ed.

Integral hoisting and tension-shaping Techniques of Ordos Cable Dome Zhansheng Liu1,2, 3, a, Zeqiang Wang 2, b, Deqing You 2,c 1 Post-Doctoral Research Center, Beijing Construction Engineering Group, Beijing 100055, China 2 Beijing Building Construction Research Institute, Co., Ltd, Beijing 100039, China 3 School of Civil Engineering, Tsinghua University, Beijing 100084, China alzs4216@163.com, b wzeq7902@sina.com, c 36453472@qq.com Keywords: Cable dome, Integral synchronous hoisting, Tension-shaping, Construction techniques Abstract.
Engineering Structures.
Communication in Numerical Methods in Engineering Vol. 16(2000), p.267 [3] Stanilav Kamet, Zuzana Kokuruduva.
Journal of Engineering Mechanics, ASCE .

It is a serious problem that how better to maintain management in coal mine equipment to reduce the frequency of equipment failure, ensure the safe operation of equipment and improve production efficiency coal mines Reliability Centered Maintenance (RCM for short) is applied to the field of the United States civil aviation in the 1960s, then used to military systems and equipment, and has now spread to other industries and gradually developed into the production equipment of the enterprise and civilian facilities [2].
References [1] Tu Yiliu, Li Xiaodong: Maintenance Engineering Management Research and Development Overview[J].
Industrial engineering and management, 2004,(4):7-12(in Chinese) [2] Jia Xisheng, Cheng Zhonghua.
Journal of ordnance engineering college, 2002,3 (3):29-32．
(in Chinese) [3] Jinghui Yang and Jianshe Kang: Science Technology and Engineering, Aug. 2007 vol.7, No.15 (in Chinese) [4] Shiwen Sun: Reliability maintenance theory application research in the power plant equipment maintenance strategy, Xian: xian jiao tong university (2000) (in Chinese) [5] Adzakpa K P: Advanced Engineering Informatics. 2003, 17:p. 151-163.