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Experimental Study on the Axial Loading Tests of RC Columns Strengthened with Steel Tube Miao Zhou1,a, Jianwei Li2,b, Jingmin Duan1,c 1College of Civil Engineering of Henan polytechnic University, Jiaozuo 454003, China 2Capital Construction Department of Henan polytechnic University, Jiaozuo 454003, China aemail:zhoumiao@hpu.edu.cn, bemail:jzljw@hpu.edu.cn, cemail:Duanjm@hpu.edu.cn Keywords: axial loading tests, steel tube, strengthen, reinforced concrete column Abstract: This paper carries out a series of experimental study on 6 column specimens, analyses and compares with the different parameters on the axial loading tests of RC columns and RC columns strengthened with steel tube.
The experimental results can offer reference for scientific research and engineering staff, and promote this reinforcement method to be widely used in engineering practice.
The results can offer reference for scientific research and engineering staff, and promote this reinforcement method to be widely used in engineering practice.
References [1] Longpan Jing: the Ninth International Symposium on Structural Engineering for Young Experts, August 18-21 2006, p1682 [2] Shantong Zhong: The Concrete—Filled Steel Tubular Structures, Tsinghua University Press, 2003, In Chinese [3] Linhai Han: The Concrete-Filled Steel Tubular Structures, Science Press, 2000, In Chinese [4] Wei Hu: Journal of Foshan University(Natural Science Edition), Vol.25 No.4,Jul.2007, p40 [5] Wenxian Feng, Jianchao Tan and Yongchang Liu: Earthquake Resistant Engineering and Retrofitting, Vol.31, No.6, Dec.2009,In Chinese

This paper is to take a large commercial building as an engineering example, introducing the new design concept of “independent fire protection unit” and “quasi-safety area” to adjust the program; then, on the basis of fire safety engineering principles, it uses the computer-assisted method to predict and assess the dangers of fire and the safety of evacuation, and thus demonstrating the feasibility of this method.
This design approach is based on the architectural fire safety engineering principles, and uses the computer-assisted method to predict and assess the dangers of fire and the safety of evacuees, in order to get the best program of the fire protection design.
Engineering design difficulties and adjustment program The total floor area of a project is 189456m2, building height is 99.7m.
Fire power Considering the fire scenario needs protection from the sprinkler system, the fire power should refer to Shanghai’s “Technical Specification for Civil Smoke (DGJ08-88-2006)”.
[2] M.Philip J.DiNenno: The SFPE Handbook of Fire Protection Engineering 2008

In accordance with engineering practice, it adopts three-dimensional solid model, the same geometric size with engineering practice.
Introduction In the design and construction of high-rise buildings, bridges and other civil engineering, foundation, pile foundation, rock and soil foundation occupy a very important position.
It is common in foundation engineering, slope engineering and underground engineering, so it is necessary to study the properties of unsaturated soils.
In accordance with engineering practice, it adopts three-dimensional solid model, the same geometric size with engineering practice.
In accordance with engineering practice, it adopts three-dimensional solid model, the same geometric size with engineering practice.

Merta1,c 1Institute of Material Technology, Building Physics, and Building Ecology, Faculty of Civil Engineering, TU Wien, 1040 Vienna, Austria 2Department of Engineering Geology and Geotechnics, Budapest University of Technology and Economics, Budapest, Hungary *Corresponding author; e-mail: abojan.poletanovic@tuwien.ac.at, bkatalin@eik.bme.hu, cildiko.merta@tuwien.ac.at Keywords: freeze/thaw, metakaolin, flax fibre, linseed oil, fibre treatment, matrix modification, mortar, mechanical properties Abstract.
,"Impact of metakaolin-a new supplementary material—on the hydration mechanism of cements", Acta Tech Napocen Civil Eng Archit, 2013a, 56 (2), 100-10 [8] Mlinárik L., Kopecskó K.
Materials Science and Engineering, 2013b, (Online) 47 (1) [9] Pigeon M., Marchand J., Pleadu R., Frost resistance Concrete, Construction and Building Materials Volume 10, Issue 5, July 1996, Pages 339-348 [10] Poletanovic B., Dragas J., Ignjatovic I., Komljenovic M., Merta I., "Physical and mechanical properties of hemp fibre reinforced alkali-activated fly ash and fly ash/slag mortars"; Construction and Building Materials, 259 (2020), 119677; S. 1 - 14
[15] Yan L., Kasal B., Huang L., A review of recent research on the use of cellulosic fibres, their fibre fabric reinforced cementitious, geo-polymer and polymer composites in civil engineering, Composites Part B. 92 (2016) 94–132

Performance Analysis of Bentonite-PVA Fiber Cement-Based Composites for Building Based on BP Neural Network Zhe Shen School of Civil and Architectural Engineering, Jiaozuo University, China, 454000 shen@jzu.edu.cn Keywords: BP neural network; bentonite; PVA fiber cement-based composites; Thermal conductivity; Mechanical properties.
This high-temperature cycle test uses a SX2-10-12 box-shaped resistance furnace (as shown in Figure.1) in the Civil Engineering Laboratory of the University of Shanghai for Science and Technology.
The uniaxial compression test uses the SANS servo pressure testing machine (see Figure 2) using the Civil Engineering Laboratory of Shanghai University of Technology.
Colloids & Surfaces A Physicochemical & Engineering Aspects, 467(467) (2015) 89-96

Large-scale studies of rejuvenators were carried out in the United States in the mid-1970s, including a four-year study by the US Air Force Civil Engineering Center and the US Army Corps of Engineers (the influence of various rejuvenators on asphalt concrete pavements in different climatic conditions: dry and hot, damp and warm, cold was investigated), confirmed the effectiveness of these materials to reduce the destruction of road surface caused by bituminous binder hardening, and to extend their durability [3].
Canadian Journal of Civil Engineering. 48 (3). (2021). 233-249
Journal of Materials in Civil Engineering. 25 (7). (2013). 829-835

Effects of freezing-thawing cycle of compressibility of cement soil Si-li CHEN 1, a, Jian-jun SHI 1, b, Tao YU 1, c, Jie HUANG 1, d, Kai-he DONG 1, e 1School of Architecture & Civil Engineering, Shenyang University of Technology, Shenyang 110870, China achen1458@163.com, bshitailongbao@163.com, c372468566@126.com, d176887878@qq.com, e425353846@qq.com Keywords: cement soil, compressibility, environmental action, effect Abstract.
The results are significant and valuable to the safety and the durability of cement soil engineering.
However, because in the north the cement soil tends to be used in the subgrade and composite foundation in the seasonal frozen soil area, it is the same particularly important to evaluate the effect of repeated freezing-thawing to the physical and mechanical parameters of cement soil and how long the cement soil engineering will be in use.
This study can provide technical parameters for the frozen regions applications and engineering design.
Cement soil freezing-thawing cycle effect of compressibility should be taken into consideration in the frozen regions engineering applications and designs

Safety Risk Analysis of Box-culvert Jacking Construction by Using Fuzzy Fault Tree Method Based on WBS-RBS XU Ke1, a, LI Huimin1 and Lu Shasha 2 1School of Civil Engineering, Xi’an University of Architecture &Technology, Xi’an, 710055, China 2 China South City Holdings Co.
Chinese Journal of Underground Space and Engineering，2011，7(5)：899-995
Chinese Journal of Geotechnical Engineering，2011，33(4)：501-507
Water Power Engineering，2007，(5)：59-61
Railway Engineering，2008，(6)：12-14

,which induce severe vibration.So, the suppression of vibration of these structures is an important problem and people have begun to accept the use of a feedback control scheme as a profitable alternative to guarantee such structures against excessive vibrations[1].Many progress has been made in the field of active control of civil engineering structures .
Earthquake Engineering & Structural Dynamics, 1991,20(2)：133-149
Earthquake Engineering & Structural Dynamics, 1991,20(2)：151-166
J. of Engineering Mechanics, 2006,Oct,1096-1105

Transverse Free Vibration Analysis of Buried Pipeline under Simply Supported Restraint Tingyue Hao Department of Civil Engineering, Tangshan College, Tangshan, 063000, China shphtysyb@163.com Keywords: Buried Pipeline, Foundation, Vibration, Matlab Abstract.
Therefore, it is important for society development, engineering construction and people’s living, to consider the interaction of soil-pipe-inner fluid, as well as carry out research of pipe vibration model and dynamic response.
Reference [1] Jianxiang Jiang and Youling Huang: Journal of Vibration Engineering, Vol.5(1992), p.396 [2] Feixue Chu: China Mechanical Engineering, Vol.17(2006), p.248 [3] G.