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Online since: January 2012
Authors: Han Long Liu, Yong Ping Wang, Zhi Tao Ma, Ji Ming Zhu
Field Test Research on Soil Compacting Effect of Cast-in-situ
Concrete Pipe Pile
Zhitao Ma 1, a, Hanlong Liu 2, b, Yongping Wang 3, c and Ji-ming Zhu 1,d
1Shandong University of Science and Technology, Resources and Environment engineering institute, Qingdao, 266590, China
2 Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,
Hohai University, Nanjing 210098, China;
3 Shandong University of Science and Technology, School of Civil engineering,
Qingdao, 266590, China
amzt123@sina.com, bhliuhhu@163.com, cwyp7841@163.com, dsdustyhl@163.com
Keywords: Cast-in-situ concrete pipe pile, Soil compacting effect, Pore water pressure, Field test research
Abstract.
Chinese Journal of Rock Mechanics and Engineering, 2005, Vol.24, Supp.2, 5740-5744.
Chinese Journal of Rock Mechanics and Engineering, 2004, 23(1):153-158.
Chinese Journal of Geotechnical Engineering, 2011, 33(2):203-208.
Chinese Journal of Rock Mechanics and Engineering, 2007, 26(Supp.1), 3059-3064.
Chinese Journal of Rock Mechanics and Engineering, 2005, Vol.24, Supp.2, 5740-5744.
Chinese Journal of Rock Mechanics and Engineering, 2004, 23(1):153-158.
Chinese Journal of Geotechnical Engineering, 2011, 33(2):203-208.
Chinese Journal of Rock Mechanics and Engineering, 2007, 26(Supp.1), 3059-3064.
Online since: December 2012
Authors: Cai Hua Shen, Dong Lei, Jing Bo Su, Ang Li, Guo Jian Shao, Sheng Yong Ding
Study on the System Optimization Method for Supporting Structure of Urban Tunnel
Ang Li1, a, Jingbo Su2, b, Caihua Shen3,c , Guojian Shao1, a , Shengyong Ding1,d and Dong Lei1,a
1 College of Mechanics and Materials, Hohai University, Nanjing, China
2 College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing, China
3 College of civil and transportation Engineering, Hohai University, Nanjing, China
a liang2008@hhu.edu.cn, b jbsu@hhu.edu.cn, c shencaihua@163.com, d dingshengyong6@163.com
Keywords: system optimization; tunnel supporting structure; SCORE function test; the analytic hierarchy process
Abstract: The tunnel project is a systems engineering problem.
Introduction The city tunnel engineering has been an effective measure in tackling urban jam and traffic chaos, environmental protection, water transport and other engineering problems.
With an increasing demand for various kinds of using underground space, the tunnel engineering [1-4] will get larger development.
Chinese Journal of Geotechnical Engineering, 1998, 20(1):112-113(In Chinese) [2] Baochen Liu.
Chinese Journal of Rock Mechanics and Engineering,1999,18(1):109–111 (In Chinese) [3] Mengjun Wu, Lunhai Huang, Xinrong Liu.
Introduction The city tunnel engineering has been an effective measure in tackling urban jam and traffic chaos, environmental protection, water transport and other engineering problems.
With an increasing demand for various kinds of using underground space, the tunnel engineering [1-4] will get larger development.
Chinese Journal of Geotechnical Engineering, 1998, 20(1):112-113(In Chinese) [2] Baochen Liu.
Chinese Journal of Rock Mechanics and Engineering,1999,18(1):109–111 (In Chinese) [3] Mengjun Wu, Lunhai Huang, Xinrong Liu.
Online since: October 2014
Authors: Feng Zhang, Cheng Cheng Lv, Zong Zhan Gao, Tong Feng Gao
Non-probabilistic Reliability Computation and Efficiency Assessment Based on Interval Model
Lv Chengcheng1, a, Gao Zongzhan2, b, Zhang Feng3, c and Gao Tongfeng4, d
1,2,3,4the Aircraft Reliability Engineering Institute, School of Mechanics, Civil Eng. & Architecture, Northwestern Polytechnical University, Xi’an, 710129
awanjunchief@126.com, bgzz@nwpuedu.cn, cyifengzhang@163.com, d18709258643@163.com
Key words:Non-probability; Reliability; Interval model; Computational efficiency
Abstract: A new interval non-probabilistic reliability method is proposed in this paper.
In practical engineering, these uncertainties generally are dealt with random variables.
However, when dealing with some complex engineering problems, traditional methods also require extensive calculation.
Fig. 5 Rectangular cross-section cantilever For the above nonlinear engineering problems, when , the reliability index 2.59 is obtained after 6441 sampling.
Numerical and engineering cases show that this method can be applied to deal with linear and nonlinear problems.
In practical engineering, these uncertainties generally are dealt with random variables.
However, when dealing with some complex engineering problems, traditional methods also require extensive calculation.
Fig. 5 Rectangular cross-section cantilever For the above nonlinear engineering problems, when , the reliability index 2.59 is obtained after 6441 sampling.
Numerical and engineering cases show that this method can be applied to deal with linear and nonlinear problems.
Online since: May 2011
Authors: Zhong An Jiang, Zhao Gui Su, Wen Geng Dong
Cause Analysis of the Dangerous Factors in Construction Accidents
and their Countermeasures
Zhaogui Su 1,2,a, Zhongan Jiang 1,b, Wengeng Dong 2,c
1 Civil & Environment Engineering School, University of Science & Technology Beijing, 100083, Beijing, china;
2 College of Environment Science & Engineering, Hebei University of Science & Technology, 050018, Shijiazhuang Hebei, china
asuzhaogui@163.com, b jza1963@263.net, c safetydwg@163.com
Keywords: construction; casualty accident; dangerous sources; hazardous factors; cause analysis; safety control measures
Abstract.
By accidental types analyzed, accident positions analyzed and accident-engineering sorts analyzed; the complexity and authenticity of accident sources in construction can be distinctly set forth.
Dangerous Sources in Construction Dangerous sources involve in construction that mainly associate with the construction divisional and partial (process) engineering, the construction installation (facility, machinery), and the material.
Mainly includes the following some respects [3]: The scaffold (include grounded scaffold, overhanging scaffold, climbing scaffold), the formwork and support, the tower crane, the material hoister, the construction elevator installment and operation, the pile with man-excavated shaft (well), the foundation ditch construction, the collapse caused by the unstable of the local structure engineering or temperature construction (work shed, wall).
In 2007, The newly built project accidents are 785, accounting for 91.39% in all the accidental project classifications, the deaths are 911, accounting for 90.02% in overall number of death people; The reconstruction engineering accidents are 56, accounting for 6.52%, the deaths are 72, accounting for 7.11%; the removing project accidents are 18, accounting for 2.1%, the deaths are 29, accounting for 2.87%[5].
By accidental types analyzed, accident positions analyzed and accident-engineering sorts analyzed; the complexity and authenticity of accident sources in construction can be distinctly set forth.
Dangerous Sources in Construction Dangerous sources involve in construction that mainly associate with the construction divisional and partial (process) engineering, the construction installation (facility, machinery), and the material.
Mainly includes the following some respects [3]: The scaffold (include grounded scaffold, overhanging scaffold, climbing scaffold), the formwork and support, the tower crane, the material hoister, the construction elevator installment and operation, the pile with man-excavated shaft (well), the foundation ditch construction, the collapse caused by the unstable of the local structure engineering or temperature construction (work shed, wall).
In 2007, The newly built project accidents are 785, accounting for 91.39% in all the accidental project classifications, the deaths are 911, accounting for 90.02% in overall number of death people; The reconstruction engineering accidents are 56, accounting for 6.52%, the deaths are 72, accounting for 7.11%; the removing project accidents are 18, accounting for 2.1%, the deaths are 29, accounting for 2.87%[5].
Online since: May 2012
Authors: Liang Feng Shen, Qian Li
Urban Mass Transit Network Project Selection Using The Fuzzy Expandable Engineering Optimization Model
Qian Li 1, a , Liangfeng Shen 1, b
1 College of Civil Engineering, Architecture and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China
a semese_li@163.com, b slf535@163.com
Keywords: Extenics;Fuzzy mathematics;Optimization Model;Urban Mass Transit
Abstract.
Table 2 Weight results of Indicators layer Primary attribute layer Secondary attribute layer Rationality of LRT line network structure (C1) Density of LRT network (C11) 0.0200 0.3146 0.0331 Total length of LRT network lines (C12) 0.0074 0.1473 0.0262 Number of transfer nodes (C13) 0.9726 0.5381 0.9408 Urban development coordination(C2) Effect on history landscapes and the urban environment (C21) 0.0186 0.1713 0.0379 Coordination with other traffic modes (C22) 0.5206 0.2703 0.6735 Rationality of land use (C23) 0.4608 0.5584 0.2886 Construction implementation (C3) Difficulty of engineering(C31) 0.1978 0.3900 0.2783 Rationality of construction by stage (C32) 0.8022 0.6100 0.7217 Comprehensive effects (C4) Average transfer time(C41) 0.1475 0.1951 0.1774 Average save trip time (C42) 0.4760 0.4411 0.2533 Percentage of LRT volume relative to total passenger volume(C43) 0.1618 0.2415 0.1573 Percentage of passenger volume crossing Xiang River relative to LRT passenger volume(C44) 0.2147 0.1223
References [1] DU Sheng-pin,Kong Jian-yi,Xiong Ling: J W U of Technology(Transportation Science & Engineering) .
Table 2 Weight results of Indicators layer Primary attribute layer Secondary attribute layer Rationality of LRT line network structure (C1) Density of LRT network (C11) 0.0200 0.3146 0.0331 Total length of LRT network lines (C12) 0.0074 0.1473 0.0262 Number of transfer nodes (C13) 0.9726 0.5381 0.9408 Urban development coordination(C2) Effect on history landscapes and the urban environment (C21) 0.0186 0.1713 0.0379 Coordination with other traffic modes (C22) 0.5206 0.2703 0.6735 Rationality of land use (C23) 0.4608 0.5584 0.2886 Construction implementation (C3) Difficulty of engineering(C31) 0.1978 0.3900 0.2783 Rationality of construction by stage (C32) 0.8022 0.6100 0.7217 Comprehensive effects (C4) Average transfer time(C41) 0.1475 0.1951 0.1774 Average save trip time (C42) 0.4760 0.4411 0.2533 Percentage of LRT volume relative to total passenger volume(C43) 0.1618 0.2415 0.1573 Percentage of passenger volume crossing Xiang River relative to LRT passenger volume(C44) 0.2147 0.1223
References [1] DU Sheng-pin,Kong Jian-yi,Xiong Ling: J W U of Technology(Transportation Science & Engineering) .
Online since: November 2012
Authors: Jia Sheng Liu
The Application of Elastic Wave Reflection Method
in the Pile Foundation Inspection
Liu Jia-sheng
School of Energy and Civil Engineering, Harbin University of Commerce, Harbin,
Heilongjiang, 150028,China
heaven217@sohu.com
Keywords: elastic wave, pile foundation, non-destructive inspection, reflection
Abstract.
The pile foundations are used widely in the construction engineering, so the nondestructive inspection applied in the pile foundation is especially important.
The foundation make of cast-in-place concrete and precast piles are widely used in architectural engineering, so quality of the pile foundation plays an important role in stability and safety of the buildings.
For most piles in engineering, their length is much larger than diameter, so the question can be predigested to one-dimension.
Thus under some special circumstances, engineering experience must be taken into consideration in the comprehensive analysis.
The pile foundations are used widely in the construction engineering, so the nondestructive inspection applied in the pile foundation is especially important.
The foundation make of cast-in-place concrete and precast piles are widely used in architectural engineering, so quality of the pile foundation plays an important role in stability and safety of the buildings.
For most piles in engineering, their length is much larger than diameter, so the question can be predigested to one-dimension.
Thus under some special circumstances, engineering experience must be taken into consideration in the comprehensive analysis.
Online since: July 2016
Authors: Hendra Jitno
[5] Makdisi, F.I., and Seed, H.B., Simplified Procedure for Estimating Dam and Embankment Earthquake-Induced Deformations, Journal of Geotechnical Engineering, American Society of Civil Engineers, Vol. 104, No. 7 (1978) 849-867
Earthquake Engineering Research Center, Rpt.
[17] Idriss, I.M. and Sun, J.I., User's Manual for SHAKE91, Center for Geotechnical Modeling, Department of Civil and Environmental Engineering, University of California, Davis, California, 13 p.
Journal of Engineering Mechanics, ASCE, 112 (9), (1986) 966-987
DYNAFLOW, A nonlinear transient finite element analysis program, Princeton University, Department of Civil Engineering, Princeton, N J., 1981
Earthquake Engineering Research Center, Rpt.
[17] Idriss, I.M. and Sun, J.I., User's Manual for SHAKE91, Center for Geotechnical Modeling, Department of Civil and Environmental Engineering, University of California, Davis, California, 13 p.
Journal of Engineering Mechanics, ASCE, 112 (9), (1986) 966-987
DYNAFLOW, A nonlinear transient finite element analysis program, Princeton University, Department of Civil Engineering, Princeton, N J., 1981
Online since: May 2011
Authors: Shi Mei Liu, Jin Sheng Liu
Several Written Instructions of the Technical Regulation of Shot-pier Shear Wall Structure key Figures Construction
Jinsheng Liua; Shimei Liub
Department of Architecture and Civil Engineering, Zhejiang College of Construction, Hangzhou, Zhejiang , 311231,China,
acjxljs89@163.com, bshimeiliu126@126.com
Keywords: short-pier shear wall, technique rules, seismic design, coupling wall—column
Abstract: As a new type of resist lateral force structure, short-pier shear wall structure has been widely used in high-rise and super-tall residential construction.
However, at present, there isn’t a specifically targeted short-leg walls structure design and construction technical regulations both at home and abroad, which led to the architectural engineering design and construction market turmoil.
By the prophase research of the short-leg walls structure seismic performance, and a great deal of experiments, combine with the latest research results at home and abroad, adopt the limit state design method based on probability theory, the paper clarifies the definition of short-leg walls, and analyzes the calculation method of section load-carrying capacity for earthquake combination and no-earthquake combination, which has certain directive significance and engineering application for the design and construction of high-rise residential buildings.
Introduction According to "Technical specification for concrete structures of tall building"(JGJ3-2003)[1],shoet- leg walls refers to the shear wall that limb section height and thickness ratio is 5 ~ 8 Due to a lack of system research and technical specification instruction, "Technical specification for concrete structures of tall building" only gives more provisions on short-leg walls than ordinary shear wall in the structure arrangement, seismic grade, axial compression ratio and so on, which makes the engineering circle lack of consistent identity in mechanical properties of short-leg walls, seismic performance and design method, led to mess to the structure design and construction of domestic short-leg walls.
Because of metope open hole is too big, shear wall limb is too short and coupling beam height is too large, and short-leg walls designed for flat column, which caused adverse impact on engineering structure security.
However, at present, there isn’t a specifically targeted short-leg walls structure design and construction technical regulations both at home and abroad, which led to the architectural engineering design and construction market turmoil.
By the prophase research of the short-leg walls structure seismic performance, and a great deal of experiments, combine with the latest research results at home and abroad, adopt the limit state design method based on probability theory, the paper clarifies the definition of short-leg walls, and analyzes the calculation method of section load-carrying capacity for earthquake combination and no-earthquake combination, which has certain directive significance and engineering application for the design and construction of high-rise residential buildings.
Introduction According to "Technical specification for concrete structures of tall building"(JGJ3-2003)[1],shoet- leg walls refers to the shear wall that limb section height and thickness ratio is 5 ~ 8 Due to a lack of system research and technical specification instruction, "Technical specification for concrete structures of tall building" only gives more provisions on short-leg walls than ordinary shear wall in the structure arrangement, seismic grade, axial compression ratio and so on, which makes the engineering circle lack of consistent identity in mechanical properties of short-leg walls, seismic performance and design method, led to mess to the structure design and construction of domestic short-leg walls.
Because of metope open hole is too big, shear wall limb is too short and coupling beam height is too large, and short-leg walls designed for flat column, which caused adverse impact on engineering structure security.
Weighting-Grey Relative Degree Assessment Model of Concrete Structure Durability and its Application
Online since: November 2012
Authors: Peng Fei Xue, Da Ling Mao
Weighting-grey Relative Degree Assessment Model of Concrete Structure Durability and Its Application
Xue Pengfei1, a, Mao Daling2,b
1 Department of Civil Engineering, Henan University of Technology, Zhengzhou 450052, China
2 The Architectural Engineering and Art Designing College, Guangdong Institute of Science and Technology, Zhuhai 519090, China
axuepengfei@gmail.com, bmaodaling@gmail.com
Keywords: Durability Assessment; grey relative degree; fuzzy recognition; dimensionless.
The model, which is testified by practical engineering example, provides a new approach to make durability assessment more scientifically and exactly.
Systems Engineering. 114 (1996)62-67
Journal of System Engineering. 10 (1995)69-74
System Engineering-Theory & Practice. 6(1999) 67-70.
The model, which is testified by practical engineering example, provides a new approach to make durability assessment more scientifically and exactly.
Systems Engineering. 114 (1996)62-67
Journal of System Engineering. 10 (1995)69-74
System Engineering-Theory & Practice. 6(1999) 67-70.
Online since: October 2011
Authors: Yong Li, Da Peng Gu, Yan Jiang Chen, Wei Ming Yan
Dynamic Model Design and Tests on a Heterotypic CFST Arch Bridge
Chen Yanjiang 1, a, Yan Weiming 1,b , Gu Dapeng 1,c, Li Yong1,d
1School of Architecture and Civil Engineering, Beijing University of Technology,
100124, Beijing, China
acyjrlx@sina.com, byanwm@bjut.edu.cn, cgudapeng2004@163.com,dlyncdw@126.com
Keywords: CFST arch bridge, Full Bridge Model Test, Dynamic test
Abstract.
The main bridge structure of the bridge engineering cross Yitong river, on the 102 national road, is a three-Span flying swallow type special-shaped CSFT arch bridge.
Journal of Structural Engineering,1997 ].
The material was designed as a combination of Q345 steel as the outer case and C50 concrete as the inner filler[[] Luca Pelà, Alessandra Aprilea, Andrea Benedettib : Engineering Structures, 2009,8 ].
Table 2 Comparison of the FEM and the Model Mode of Rib Measured Value Theoretical Value Error (%) symmetrical bending out of plane 7.49(Hz) 7.82(Hz) -4.22 antisymmetrical bending out of plane 18.98(Hz) 20.70(Hz) -8.31 antisymmetrical bending in plane 26.37(Hz) 25.72(Hz) 2.53 symmetrical bending in plane 28.99(Hz) 28.18(Hz) 2.79 Dynamic Loading Test of the Bridge The dynamic loading test was designed as a 35t truck passing a 10cm triangular wood with a speed of 20km/h[[] Zhou-Hong Zong, Bijaya Jaishi : Engineering Structures,2001,1 ].
The main bridge structure of the bridge engineering cross Yitong river, on the 102 national road, is a three-Span flying swallow type special-shaped CSFT arch bridge.
Journal of Structural Engineering,1997 ].
The material was designed as a combination of Q345 steel as the outer case and C50 concrete as the inner filler[[] Luca Pelà, Alessandra Aprilea, Andrea Benedettib : Engineering Structures, 2009,8 ].
Table 2 Comparison of the FEM and the Model Mode of Rib Measured Value Theoretical Value Error (%) symmetrical bending out of plane 7.49(Hz) 7.82(Hz) -4.22 antisymmetrical bending out of plane 18.98(Hz) 20.70(Hz) -8.31 antisymmetrical bending in plane 26.37(Hz) 25.72(Hz) 2.53 symmetrical bending in plane 28.99(Hz) 28.18(Hz) 2.79 Dynamic Loading Test of the Bridge The dynamic loading test was designed as a 35t truck passing a 10cm triangular wood with a speed of 20km/h[[] Zhou-Hong Zong, Bijaya Jaishi : Engineering Structures,2001,1 ].