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检索条件"机构=The Key Lab of Disaster Forecast and Control in Engineering"

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Equilibrium paths of a fractional order viscoelastic two-member truss

引用

Global Conference on Civil, Structural and Environmental engineering / 3rd International Symp on Multi-field Coupling Theory of Rock and Soil Media and its Applications

作者： Tang, Mingqiao Li, Yuanping Jinan Univ Minist Educ Peoples Republ China Key Lab Disaster Forecast & Control Engn Jinan Peoples R China

ISBN: (纸本)9783037855362

The fractional dynamics equation of a viscoelastic two-member truss system, in which fractional derivative model introduced to simulate the materials' characteristics, is proposed. The equilibrium paths under vertical loads, horizontal loads and combined loads are discussed respectively. The results show that: there are primary and secondary equilibrium paths under vertical and horizontal loads. Bifurcations will occur under combined loads and the ultimate bearing capacity of the system will reduce. The equilibrium paths became complex because of the horizontal disturbance, and the bigger of the horizontal disturbance the smaller of the system ultimate bearing capacity.

关键词： Fractional derivative Viscoelasticity Mises truss equilibrium paths

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Study on Optimizing Design of Structural Rigidity of Super-large Span Continuous Rigid Frame Bridge Using ANSYS

Study on Optimizing Design of Structural Rigidity of Super-l...

引用

2nd International Conferene on Structures and Building Materials (ICSBM2012)

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)9783037853474

In this paper, the situation of the midspan deflection of the span continuous rigid frame bridge is described, and the cause of the deflection is explained. It may be caused by the problem of the rigidity. Then the ANSYS is used to conduct analysis. The deflection of the biggest cantilever of the rigid frame bridge is the controlled target, and the optimizing design of the Sutong bridge is conducted. A meaningful result is obtained, and it provides a basis of the choice of the height of beams.

关键词： continuous rigid frame bridge rigidity deflection optimizing design

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Application of the R-function theory and least square method for torsion problem with H-shaped cross-section

Application of the R-function theory and least square method...

引用

2nd International Conference on Advanced Design and Manufacturing engineering (ADME 2012)

作者： Li, Ping-Ping 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)9783037855027

The R-function theory and least square method are employed to solve the torsion problem of the bar with H-shaped cross-section. When the least square 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 H-shaped 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 H-shaped cross-section by implicit function form. Introducing the R-function theory can be easy to construct the stress function that satisfied the boundary of H-shaped cross-section. A numerical example demonstrates the feasibility and efficiency of the present method.

关键词： R-function theory least square method bar with H-shaped cross-section torsion problem

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Green quasifunction method for bending problem of clamped orthotropic thin plates with trapezoidal boundary shape

Green quasifunction method for bending problem of clamped or...

引用

International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM 2011)

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)9783037852804

The Green quasifunction method(GQM) is employed to solve the bending problem of clamped orthotropic thin plates with trapezoidal boundary shape. Firstly the governing differential equation of the problem is reduced to the boundary value problem of the biharmonic operator, and then it is reduced to the Fredholm integral equation of the second kind by Green's formula. A Green quasifunction is established by using the fundamental solution and the boundary equation of the problem. This function satisfies the homogeneous boundary condition of the problem. The singularity of the kernel of the integral equation is overcome by choosing a suitable form of the normalized boundary equation. A numerical example demonstrates the feasibility and efficiency of the proposed method, and it is a novel mathematical method.

关键词： Green's function integral equation R-function orthotropic plate bending problem

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Analysis Research Progress on the FRP Reinforced RC Beam-Column Joints in Civil engineering

Analysis Research Progress on the FRP Reinforced RC Beam-Col...

引用

International Conference on Civil engineering and Material engineering (CEME2012)

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

This paper briefly expounds the present situation of the research on FRP reinforced RC beam-column joints from three aspects including theoretical study, experimental investigation and numerical simulation Finally, th... 详细信息

ISBN: (纸本)9783037854747

关键词： FRP reinforcement Beam-column joints Theoretical study Experiment investigation Numerical simulation

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A Quasi-Green's Function Method for the Bending Problem of Simply Supported Trapezoidal Shallow Spherical Shells on Winkler Foundation

A Quasi-Green's Function Method for the Bending Problem of S...

引用

2nd International Conference on Structures and Building Materials (ICSBM)

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)9783037853474;9783038137900

The quasi-Green's function method (QGFM) is applied to solve the bending problem of simply supported trapezoidal shallow spherical shells on Winkler foundation. A quasi-Green's function is established by using the fundamental solution and the boundary equation of the problem. And the function satisfies the homogeneous boundary condition of the problem. Then the differential equation of the problem is reduced to two simultaneous Fredholm integral equations of the second kind by the Green's formula. The singularity of the kernel of the integral equation is overcome by choosing a suitable form of the normalized boundary equation. The comparison with the ANSYS finite element solution shows a good agreement, and it demonstrates the feasibility and efficiency of the proposed method.

关键词： Green's function R-function integral equation bending of shallow spherical shell Winkler foundation

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The Analysis and Experiment on key Technologies of Structural Design of Cap Beams of Highway Bridges

The Analysis and Experiment on Key Technologies of Structura...

引用

International Conference on Vibration, Structural engineering and Measurement (ICVSEM 2011)

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

ISBN: (纸本)9783037852644

In the paper, two key technologies of cap beams of highway bridges are studied, and the reductions of the bending moment on a pillar top and the lateral loading of live one are calculated and done experimental research. For the reduction problem of the bending moment on a pillar top, we build a three-dimensional entity model by ANSYS, and extract the bending moment of cap beams by the method of using track variable operation in post-treatment. Comparing the results of three-dimensional entity model with that of measurement of cap beams of a bridge in Zhuhai, it reveals that the reduction theory of the bending moment on an intermediate supporting of continuous beams can be applicable. For the lateral loading problem of the live load on cap beams, a new delivery method for the live load on cap beams is proposed. The transferring method is more conform to actual structure.

关键词： cap beam bending moment reduction lateral load three-dimensional finite element

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Unloading behavior study on FRP-to-concrete interface

Unloading behavior study on FRP-to-concrete interface

引用

Global Conference on Civil, Structural and Environmental engineering / 3rd International Symp on Multi-field Coupling Theory of Rock and Soil Media and its Applications

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

ISBN: (纸本)9783037855379

Bi-linear constitutive model is commonly used to study the bond-slip behaviors of the interface between FRP and concrete, unloading behavior is one of the most important problems that should be considered. The path of unloading is debatable, no specialized research achievement has been found so far. Based on simple shear test, the model with secant unloading is employed to study the unloading behavior of the interface between FRP and concrete in this paper, then governing equation about this behavior during the bond-slip process of the interface is derived. A closed form analytical solution about the slip and shear stress distribution of the whole interface, as well as the load-displacement response are obtained, which are also compared with that of elastic unloading, the main difference between them are given. Results obtained in this paper are helpful to further study on more complicated problems (such as the bond-slip behavior of the interface caused by two adjacent flexural cracks, as well as intermediate shearing crack).

关键词： FRP bond-slip bi-linear unloading path analytical solution

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Green Quasifunction Method for Bending Problem of Clamped Orthotropic Trapezoidal Thin Plates on Winkler Foundation

Green Quasifunction Method for Bending Problem of Clamped Or...

引用

2nd International Conference on Applied Mechanics and Mechanical engineering (ICAMME 2011)

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)9783037852965

The Green quasifunction method(GQM) is applied to solve the bending problem of clamped orthotropic thin plates with trapezoidal boundary shape on Winkler foundation. Firstly the governing differential equation of the problem is reduced to the boundary value problem of the biharmonic operator, and then it is reduced to the Fredholm integral equation of the second kind by Green's formula. A Green quasi function is established by using the fundamental solution and the boundary equation of the problem. This function satisfies the homogeneous boundary condition of the problem. The singularity of the kernel of the integral equation is overcome by choosing a suitable form of the normalized boundary equation. The comparison with ANSYS finite element solution shows good agreement. The proposed method is a novel and effective mathematical one.

关键词： Green's function integral equation R-function Winkler foundation bending of orthotropic plate

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Application of the R-function Theory for the Bending Problem of Shallow Spherical Shells with a Dodecagon Domain

Application of the R-function Theory for the Bending Problem...

引用

3rd International Conference on Manufacturing Science and engineering (ICMSE 2012)

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)9783037853696

The R-function theory is applied to describe the dodecagon domain of shallow spherical shells on Winkler foundation, and it is also used to construct a quasi-Green's function. The quasi-Green's function satisfies the homogeneous boundary condition of the problem. Then the differential equation of the problem is reduced to two simultaneous Fredholm integral equations of the second kind by the Green's formula. The singularity of the kernel of the integral equation is overcome by choosing a suitable form of the normalized boundary equation. A comparison with the ANSYS finite element solution shows a good agreement, and it demonstrates the feasibility and efficiency of the present method.

关键词： Green's function R-function integral equation bending of shallow spherical shell dodecagon domain

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