Search results

Damage Identification Research of Axial Vibration Modal Shape Teng Haiwen1, 2,a, Wang Tao3, b, Su Mingyu1,c and Huo Da1,2,d 1College of Architecture and Civil Engineering, Beijing University of Technology, Beijing,100124, China, 2 Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing,100124, China; 3Beijing Road and Bridge Construction Group Co, Ltd, Beijing, 102206, China atenghaiwen@bjut.edu.cn, bquarkwang@hotmail.com, csumingyu10271@sina.com, dhuoda@bjut.edu.cn Keywords: damage identification, acceleration signal, modal analysis, axial vibration Abstract: A new method taking the second derivative of low-level axial vibration modal shape as damage index is presented on the basis of theoretical derivation axial vibration differential equation and analytical solution of three kinds of support form.
(2) When there are more damages, each damage index has obvious mutation and the interaction between the damages is very small, which easily operate in practical engineering
(3) The analysis of the measuring points on the effect of identification result shows that, as long as the damage index in this order is sensitive, this method can identify damage location and degree very well with less measuring point References [1] Hongnan Li, Dongsheng Li: Safety assessment, health monitoring and damage diagnosis for structures in civil engineering [J].
Earthquake Engineering and Engineering Vibration, Vol.22(3): 82~90 (2002) (in Chinese) [2] G.

Journal of Hydraulic Engineering, 2001, 32(7): 79-83
Chinese Journal of Geotechnical Engineering, 2001, 23(1):3-12
Journal of Traffic and Transportation Engineering, 2004, 4(2):14-18
[6] Northwest Research Institute of Engineering Investigations and Design.
Journal of Architecture and Civil Engineering, 2006, 23 (3):71-75.

Wang1,b School of Civil Engineering, Jilin Architectural and Civil Engineering Institute, Changchun, 130118, China agaobing0431@126.com b444034176@qq.com Key Words: Coupled Steel Bars; Stiffness; Crack; Model; Calculating Formulas.
Introduction It is a future our country development trend to make use of a low metal alloy steel to carry on engineering construction.
This text mainly elaborated to adopt low metal alloy steel and low-carbon steel make into a low metal alloy steel through the even weld double reinforcing bar, pass to experiment analysis, make sure its mechanics and craft function index sign; Use concrete structure design norm as the theory foundation that is analytical and experiments a data, set up lately just degree and crack model formula, provided for the later engineering construction basis.
(11) Conclusion Application research for coupled steel bars technology, not only apply to foundation, work, consolidation of foundation pit, foundation beam, foundation mat, column, pile foundation, bracing of slope, anchor rod of soil stratum and rock, but also apply to irrigation works, road engineering, bridge engineering, etc[4].

Interfacial Shear Calculation of Concrete Beams Strengthened with FRP Plate under Temperature and Creep Effect Jia Yang 1, a, Lianguang Wang 1,b and Bailing Chen1,c 1 School of Resource & Civil Engineering, Northeastern University, Shenyang, China ayangjia0918@163.com, blgwneu@hotmail.com,cbailingc@163.com Keywords: FRP plate, Concrete beams, Interfacial shear, Temperature effect, Creep effect.
And partial research results were applied in practical engineering.
China Civil Engineering Journal, 2000, 30(8): 51-54.
ASCE Journal of Structural Engineering, 2001, 127(7): 784-791
Engineering Structures, Vol. 30(2008), p. 3305

Influence of strain rate on mechanical properties of shape memory alloy Zhenqing Wang1, a, Hongshuai Lei1, b, Bo Zhou1, c, Yulong Wang1, d, Chen Zhang1,e 1 College of Aerospace and Civil Engineering of Harbin Engineering University, Harbin, Heilongjiang, P.
Introduction Shape Memory Alloys (SMA) has widely used in many fields such as civil engineering, inspection, medical treatment engineering, energy and mechanical engineering.
Acknowledgement This work has been supported by the Fundamental Research Funds for the Central Universities (HEUCF20100201 and HEUCFZ1004), and the author wish to acknowledge Harbin Engineering University of China.

Experimental study on strength of rock masses with transfixion joint under uniaxial compression Lei Wang1,2,a, Shuchen Li2,b, Jianxin Han3,c and Zhongyi Zeng 2,d 1 PLA Institute of Engineering Corps, Xuzhou, Jiangsu 221004, China 2 School of Civil & Hydraulic Engineering, Shandong University, Jinan 250061,China 3 School of Mathematic and Quantitative Economics, Shandong University of Finance and Economics, Jinan 250014, China awljdd@foxmail.com, bshuchenli@sdu.edu.cn, cmohan2002@126.com, dfengzhilg@163.com Keywords: post-peak; transfixion joint; uniaxial compression; rock mass strength.
All experiments were performed at TAW-2000 microcomputer control high stiffness servo testing machine of the Civil Engineering Laboratories, Shandong University, China (shown in Fig.3).
Chinese Journal of Rock Mechanics and Engineering. 2011, 30(4): 783-789
Engineering Fracture Mechanics, 2002, 69(17): 1853-1871
Chinese Journal of Rock Mechanics and Engineering, 2008, (10): 2118-2123.

Assessment of Local Damage Level in Engineered Cementitious Composites (ECC) using Stress Wave Propagation Dong-Soo Kim 1,a, Kwang-Myong Lee2,b, Nam-Ryong Kim 1,c and Seok-Woo Jin1,d 1 Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong, Yuseong, Daejeon, 305-701, Korea 2 Department of Civil and Environmental Engineering, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, Gyeonggi, 440-746, Korea a dskim@kaist.ac.kr, bleekm@skku.ac.kr, cdido@kaist.ac.kr, dchival@kaist.ac.kr Keywords: Concrete, ECC, Stress wave, Damage, Impact echo, Pulse Velocity Measurement Abstract.
Prismatic specimens (100�100�200 mm) made of ECC (engineered cementitious composites) mixture, were used for the test.
One example is the recently developed ultra-ductile engineered cementitious composites (ECC) [1].
Conclusions The impact echo and pulse velocity measurements were performed to evaluate microcrack growth and degradation of elastic properties in ECC (engineered cementitious composites) materials during uniaxial compression.
S.: Time-Frequency Analysis for Impact Echo-SASW (IE-SASW) Method, Key Engineering Materials, Vol. 270/273, pp. 1529-1534. 2004

The settlement analysis of the cement fly-ash gravel pile composite foundation of Baotou Juan Li1, a, Yao Xu2, b and Jun Yin3, c 1 School of architectural and civil engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China 2BaoGang Real estate development company, Baotou 014010, China 3Baogang Group Design & Research Institute, Baotou 014010, China ateleiweili@163.com, bxuyao225b@tom.com, cyinjun8277@tom.com Keywords: Cement fly-ash gravel pile composite foundation, Resilience-recompression, Consolidation settlement, Settlement analysis.
examples in different areas of the Baotou area, and obtain the five engineering total settlement value before the five engineering settlement values are amended.
In an engineering example, the soil physical and mechanical indexes in various soil layer and the parameters of the settlement calculation in foundation are shown in Table 2.
Geotechnical engineering division.
Proceedings of the American Society of Civil Engineers. 1978,(104) : 1465-1488

Sudjadi2,b 1Department of Civil Engineering, Diponegoro University, Jl.
Hayam Wuruk 5-7, Semarang 50275 Indonesia. 2Department of Mechanical Engineering, Mercu Buana University, Jakarta 11650, Indonesia.
Love: Assesment of Residential Defects at Post-handover, Journal Construction Engineering and Management, ASCE (2012)
Winandi: The Study of Management of Building Maintenance in Lampung University, Journal Civil and Planning, REKAYASA, Indonesia. (2009)
Roca: Standardizing Housing Defects: Classification, Validation and Benefits, Journal Construction Engineering and Management, ASCE (2012)

Research on Bearing Capacity of Steel Tube-Reinforced Concrete Column Subjected to Eccentric Compression Load Quanquan Guo 1, a, Jieting Hu 2,b 1 Dept. of Civil Engineering , Beijing University of Aeronautics and Astronautics, China 2 Dept. of Civil Engineering , Beijing University of Aeronautics and Astronautics, China a qq_guo@buaa.edu.cn, b hjetty@163.com Keywords: steel tube-reinforced concrete column; nonlinear analysis; eccentric compression; isoparametric element; ultimate capacity Abstract: Nonlinear constitutive law was used in this paper.
Civil Engineering Journal, Vol. 36(2005), p.9-13.
Journal of Harbin University of Civil Engineering and Architecture, Vol. 28(1995), p.26-32.
Harbin: Publishing House of Harbin Institute of Technology(1996) [11]China Association for Engineering Construction Standardization: Technical Specification for Steel Tube-reinforced Concrete Column Structure, China Planning Press(2005) (In Chinese)