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3rd International Conference on Civil engineering, Architecture and Building Materials (CEABM 2013)

作者： Li, Shanqing Yuan, Hong Jinan Univ Inst Appl Mech MOE Key Lab Disaster Forecast & Control Engn Guangzhou 510632 Guangdong Peoples R China

ISBN: (纸本)9783037857755

The R-function theory and variational method are employed to solve the torsion problem of the bar with a complicated cross-section. When the variational method is used to solve the elastic torsion problem alone, the stress function can be set to meet the boundary condition, only with the simple cross-section such as the rectangle and ellipse. For the complicated cross-section, it is hard to find a stress function to meet the boundary condition. The R-function theory can solve the problem, and it can be used to describe the complicated cross-section by implicit function form. Introducing the R-function theory can be easy to construct the stress function that satisfied the boundary of the complicated cross-section. A numerical example demonstrates the feasibility and efficiency of the present method.

关键词： R-function theory variational method bar with complicated cross-section torsion problem

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A New Steel Beam Configuration Method of Long-term deflection control of Long-span PC beam bridge

A New Steel Beam Configuration Method of Long-term deflectio...

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3rd International Conference on Civil engineering, Architecture and Building Materials (CEABM 2013)

作者： Xue, Xingwei Yuan, Hong Li, Shanqing Jinan Univ Inst Appl Mech MOE Key Lab Disaster Forecast & Control Engn Guangzhou 510632 Guangdong Peoples R China

ISBN: (纸本)9783037857779

For solving the big deflection problem which is cause by the far cantilever segment of dead load zero bending moment method, analyzing the composition process of dead load and prestress bending moment, and this paper presents the improvement of dead load zero bending moment *** improved method adopts the prestress in principle: far segment more and close segment litter, which not only can insure the prestress bending moment bigger than dead load zero bending moment in all over the cantilever constructing stage, but also can control the deflection well. The improved method is applied to a PC continuous bridge which has a main span of 168 metres, the deflection decreases 24.4% to that of the original design.

关键词： dead load zero bending moment method long-span PC beam bridge deflection control

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Effective elastic moduli of fiber-reinforced polymer matrix composites filled with nano-particle

Effective elastic moduli of fiber-reinforced polymer matrix ...

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2nd International Conference on Mechanical Properties of Materials and Information Technology, ICMPMIT 2013

作者： Zhang, Hui Zhang, Zong Fu Xu, Jia Chu Department of Mechanics and Civil Engineering Jinan University Guangzhou 510632 China Key Lab of Disaster Forecast and Control in Engineering Ministry of Education Jinan University Guangzhou China

ISBN: (纸本)9783037858608

Effective moduli of fiber-reinforced polymer matrix composites filled with nano-particle considering the effect of linear change of interphase are presented in this paper. The three-phase inclusion problem for matrix-interface-particle is equivalent to the Eshelby two-phase inclusion problem. According to the result of the Eshelby inclusion problem, the effective modulus tensor of unit cell of equivalent particle is derived. The effective moduli of equivalent matrix are given based on Mori-Tanaka method. Using two fundamental equation of micromechanic theory, the three-dimensional bridged formulation of unidirectional composites is derived. The quantitative relationship between the macroscopic elastic parameters and the structural parameters of the fiber-reinforced polymer composites filled with nano-particles is investigated. Effects of the thickness of interfacial layer, the particle size and the volume fraction of nanoparticles on the effective elastic moduli of the composites are also discussed. © (2013) Trans Tech Publications, Switzerland.

关键词： Homogenization method

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An Effect Analysis of Color Design in Guangzhou Subway System: From the Color Universal Design Perspective

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International Conference on Structures and Building Materials (ICSBM 2013)

作者： Lin, Jingwei Tang, Jian Jinan Univ Key Lab Disaster Forecast & Control Engn Minist Educ Peoples Republ China Guangzhou 510632 Guangdong Peoples R China

ISBN: (纸本)9783037856611

The Guangzhou Subway System adopts a planning scheme that guides passengers through a system of symbolic colors for its routes. However, the designers seem to have neglected color blind's difficulty in distinguishing some hues when selecting the routes' symbolic colors, which suggests that color universal design theories are not properly applied in their design work. This research aims at evaluating Guangzhou Subway's symbolic color and guidance system from the color universal design perspective. We use the Vischeck[1] to simulate and analyze the practical situation. In accordance with the analysis, solutions are recommended.

关键词： Urban planning Subways Guangzhou subway's symbolic color and guidance system Color barrier-free design

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The Analysis of Planning Guide Effect of Guangzhou Metro Line Five's Construction to the Non-existed Central District of the City

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2nd International Conference on Civil engineering and Transportation (ICCET 2012)

作者： Zhao, Qian Tang, Jian Jinan Univ Key Lab Disaster Forecast & Control Engn Minist Educ Peoples Republ China Guangzhou 510632 Guangdong Peoples R China

ISBN: (纸本)9783037855645

This essay discusses the effect of what the construction of the Metro Line Five of Guangzhou has to the development of existing central district and non-existed central district of Guangzhou City. Through the investigation and research into the quantity change of the public facilities around every exit of Metro Line Five within 500 meters, the essay analyses the planning guide effect of the construction of Metro Line Five to the land development and city construction of Guangzhou.

关键词： Urban planning Railroad transportation Metro Lines non-existed central district TOD

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Experimental study of air distribution characteristics in room of Stratum ventilation under two kinds of air change times

Experimental study of air distribution characteristics in ro...

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2nd International Conference on Civil, Architectural and Hydraulic engineering (ICCAHE 2013)

作者： Xu, Yongmei Tang, Jian Han, Jun Lin, Chuqin Jinan Univ Minist Educ Peoples Republ China Key Lab Disaster Forecast & Control Engn Guangzhou 510632 Guangdong Peoples R China

ISBN: (纸本)9783037858585

Aimed at a new type of ventilation - stratum ventilation, air distributions at a breathing-zone in a model office were measured under kinds of air changes, the measure parameters in the experimental studies included temperatures, wind speeds and pollutant concentrations, based on which the thermal comfort at a breathing-zone were studied. Experimental results show that, the temperature, pollutant concentration and wind speeds in a breathing-zone under 5 times air changes are better than those under 6 times air changes. The calculating results of PMV and PPD indicate that the thermal comfort at a breathing-zone under 5 times air changes is better. The experimental study is instructive for the development of the ventilation.

关键词： Buildings-air conditioning Energy conservation Air distribution Stratum ventilation Thermal comfort

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Experimental investigations on mechanical properties and fire resistance of steel-polypropylene hybrid fiber reinforced concrete

Experimental investigations on mechanical properties and fir...

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2013 International Conference on Future Energy and Materials Research, FEMR 2013

作者： Ouyang, Dong Kong, Lin Jie Fu, Hao Lu, Liu Lei Liao, Long Huang, Chen wu MOE Key Lab of Disaster Forecast and Control in Engineering Jinan University Guangdong 510632 China Center for Engineering Materials and Struture Durability Research Jinan University Guangdong 510632 China

ISBN: (纸本)9783037857892

This paper investigates the mechanical properties and the fire resistance of steel-polypropylene hybrid fiber-reinforced concrete. The type of the polypropylene fibers are polypropylene monofilament fiber, polypropylene fibrillated fiber, and macro polypropylene fiber, and the type of the steel fibers is hooked steel fiber. The experimental results show that the compressive strength, splitting tensile strength and flexural properties of steel-macro polypropylene hybrid fiber reinforced concrete are better than any others. And the fire resistance of steel-monofilament polypropylene hybrid fiber reinforced concrete is the best. © (2013) Trans Tech Publications, Switzerland.

关键词： Polypropylenes

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Full-range behavior of FRP-to-concrete bonded joints with trilinear bond-slip law

Full-range behavior of FRP-to-concrete bonded joints with tr...

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5th International Conference on Structural engineering, Mechanics and Computation, SEMC 2013

作者： Yuan, H. Wu, L. MOE Key Lab of Disaster and Control in Engineering Institute of Applied Mechanics Jinan University Guangzhou China

ISBN: (纸本)9781138000612

This paper presents a close-form analytical solution of both interfacial shear stress distribution and load-displacement response, which is capable of predicting the entire debonding propagation process including elastic, elastic-flow, elastic-flow-softening, elastic-flow-softening-debonding, flow-softening-debonding, and softening-debonding stages. Based on experimental result of high Young's modulus type of CFRP plateto- concrete bonded joints, a nonlinear fracture mechanics method, in which the tri-linear local bond slip law is employed, is used to understand the stress transfer mechanism, interfacial crack propagation and ductility behavior in adhesive bonded joint. It is also shown how experimental load-displacement response of bonded joints can be used to identify interfacial properties, including the interfacial fracture energy and parameters of the local bond-slip relationship. The concept of serviceability limit state and ultimate limit state is considered. © 2013 Taylor & Francis Group, London, UK.

关键词： Debonding

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Structural damage detection based on the reconstructed phase space for reinforced concrete slab: Experimental study

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JOURNAL OF SOUND AND VIBRATION 2013年第4期332卷 1061-1078页

作者： Nie, Zhenhua Hao, Hong Ma, Hongwei Jinan Univ Coll Sci & Engn Guangzhou 510632 Guangdong Peoples R China Univ Western Australia Sch Civil & Resource Engn Nedlands WA 6009 Australia Minist Educ China Key Lab Disaster Forecast & Control Engn Guangzhou Guangdong Peoples R China

In this paper, a parameter based on geometry changes of the reconstructed multidimensional phase space of the measured vibration signals for structural damage identification is proposed. The choice of the proper delay time steps and embedding dimensions for phase space reconstruction of linear systems is discussed. Using the determined delay time and embedding dimensions, an index Changes of Phase Space Topology (CPST) with multiple embedding dimensions is calculated and then used to identify the structural damage. To demonstrate the reliability of the proposed method, vibration test data corresponding to different damage states of a continuous reinforced concrete slab is used to calculate the CPST value for damage identification. The results indicate that except the measurement points at structural supports, the CPST values at all the measurement points on the structure increase with structural damage level irrespective of the damage location, indicating that using a single or a minimum number of measurement points and their CPST value can effectively identify damage existence in the structure. The traditional modal-based indices are also calculated using the same vibration data for comparison. It is found that the proposed method with CPST is the most sensitive to structural damage than any modal-based index. The results demonstrate that the proposed method with CPST value is very effective in identifying damage existence in the structure. Although it cannot quantify the damage, it can be a good candidate for continuous structural health monitoring because it needs only a few sensors to detect damage existence in the entire structure. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： PHASE space (Statistical physics) STRUCTURAL failures CONCRETE slabs PHYSICS experiments PARAMETER estimation COMPARATIVE studies STRUCTURAL health monitoring

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Nonlinear dynamic buckling for truncated sandwich shallow conical shell structure subjected to pulse impact

Nonlinear dynamic buckling for truncated sandwich shallow co...

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International Conference on Applied Mechanics and Manufacturing System (AMMS 2012)

作者： Tang, Ming-qiao Xu, Jia-chu Jinan Univ Dept Mech & Civil Engn Guangzhou 510632 Guangdong Peoples R China Minist Educ China Key Lab Disaster Forecast & Control Engn Guangzhou 510632 Peoples R China

ISBN: (纸本)9783037855621

Nonlinear dynamic buckling for sandwich shallow conical shell structure under uniform triangular pulse is investigated. Based on the Reissner's assumption and Hamiton's principle, the nonlinear dynamic governing equation of sandwich shallow spherical shells is derived. The corresponding nonlinear dynamic response equations are obtained by Galerkin method and solved by Runge-Kutta method. Budiansky-Roth criterion expressed by displacements of rigid center is employed to determine the critical impact bucking load. The effects of geometric parameters and physical parameters on impact buckling are discussed.

关键词： truncated sandwich shallow conical shell structure nonlinear dynamic buckling Budiansky-Roth criterion Galerkin method

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