Study on the Static Stability and the Ultimate Bearing Capacity of Vierendeel Latticed Shells

2011 ◽  
Vol 94-96 ◽  
pp. 868-871
Author(s):  
Wen Feng Du ◽  
Zhi Yong Zhou ◽  
Fu Dong Yu
Keyword(s):  
Finite Element Method ◽  
Bearing Capacity ◽  
Carrying Capacity ◽  
Shell Structure ◽  
Single Layer ◽  
Static Stability ◽  
Ultimate Bearing Capacity ◽  
The Finite Element Method ◽  
The Stability ◽  
Lattice Shell

Studies on the static stability and the ultimate bearing capacity of vierendeel latticed shells have been carried out. The buckling modal and the whole course of instability are shown using the Finite Element Method. The ultimate bearing capacity is compared with that of the single-layer latticed shell structure. The results show that the ultimate bearing capacity of the vierendeel latticed shells is 2.87 times more than that of the single-layer lattice shell in the condition of consuming the same steel. The vierendeel latticed shell structure not only has the advantages of concision and transparency like the single layer latticed shell structure, but also has the stability and carrying capacity like double-layer latticed shell structure.

Stability Analysis for a Latticed Shell Based on ABAQUS

2014 ◽  
Vol 578-579 ◽  
pp. 141-145
Author(s):  
Yun Ying Ma ◽  
Jin Duan ◽  
Hong Shao
Keyword(s):  
Stability Analysis ◽  
Bearing Capacity ◽  
Nonlinear Stability ◽  
Shell Structure ◽  
Geometric Nonlinearity ◽  
Single Layer ◽  
Ultimate Bearing Capacity ◽  
Structural Performance ◽  
Damage Mode ◽  
The Stability

In this paper, the stability analysis of a single-layer latticed shell structure is presented using ABAQUS, with the geometric nonlinearity considered. The load-displacement curves are calculated according to the elastic and elasto-plastic hypothesis respectively. The ultimate bearing capacity of the structure and its conceivable damage mode are estimated. Finally, the nonlinear stability of this structure is assecced and the further suggstions for improving the structural performance are presented.

Nonlinear Buckling Analysis of Long-Span Suspended Latticed Intersected Cylindrical Shell

2014 ◽  
Vol 919-921 ◽  
pp. 169-176 ◽  
Author(s):  
Ming Liang Zhu ◽  
Yan Sun
Keyword(s):  
Cylindrical Shell ◽  
Bearing Capacity ◽  
Single Layer ◽  
Ultimate Bearing Capacity ◽  
Buckling Analysis ◽  
Nonlinear Buckling ◽  
Long Span ◽  
The Stability ◽  
Nonlinear Buckling Analysis ◽  
Material Nonlinear

The Suspended Latticed Intersected Cylindrical Shell (SLICS) is a new structural system, composed by the single layer Latticed Intersected Cylindrical Shell (LICS) and the prestressed cable-strut system. Mechanical properties of this structure were investigated through nonlinear buckling analysis by the consistent imperfect buckling analysis method, compared with the single layer LICS. Structure parameters including prestress level, member section, length of bar, rise-span ratio, obliquity were analyzed. And the effect of material nonlinearity on the stability was studied. Results show that the ultimate bearing capacity of the SLICS is improved as the introduction of prestress. However the prestress level has a limited impact on the ultimate bearing capacity. And the material nonlinear is very important to the stability of the SLICS.

scholarly journals REVIEW OF AVAILABLE APPROACHES FOR ULTIMATE BEARING CAPACITY OF TWO-LAYERED SOILS

2012 ◽  
Vol 18 (4) ◽  
pp. 469-482 ◽  
Author(s):  
M. Dalili Shoaei ◽  
A. Alkarni ◽  
J. Noorzaei ◽  
M. S. Jaafar ◽  
Bujang B. K. Huat
Keyword(s):  
Neural Network ◽  
Finite Element Method ◽  
Artificial Neural Network ◽  
Finite Element ◽  
Bearing Capacity ◽  
State Of The Art ◽  
Classical Method ◽  
Ultimate Bearing Capacity ◽  
Layered Soils ◽  
The Finite Element Method

This paper presents the state of the art report on available approaches to predicting the ultimate bearing capacity of two-layered soils. The article discusses three most popular methods, including the classical method, application of the finite element method and artificial neural network. Various approaches based on these three powerful tools are studied and their methodologies are discussed.

The Stability Analysis on the Different Types of Single Layer Latticed Shell

2013 ◽  
Vol 788 ◽  
pp. 598-601
Author(s):  
Jun Qiang Wu ◽  
Yu Cui
Keyword(s):  
Stability Analysis ◽  
Static Load ◽  
Single Layer ◽  
Static Stability ◽  
Different Types ◽  
Practical Engineering ◽  
Small Structure ◽  
The Stability ◽  
Lattice Shell ◽  
Better Than

This single-layer spherical reticulated shell has the advantages of reasonable stress,beautiful appearance ,fast construction,is widely applied in practical engineering. Through the static stability analysis of three kinds of single-layer spherical lattice shell structure using ansys, we get them in the uniform deformation under static load, the modal, buckling load. The results show that: The Kiewitt latticed shells displacement is small, structure is stable, better than SchwedLer and lianfang.

Research on the Influence of the P-δ Effect to Ultimate Bearing Capacity of Single Layer Latticed Shell Structures

2012 ◽  
Vol 193-194 ◽  
pp. 872-875
Author(s):  
Wen Feng Du ◽  
Zhi Yong Zhou
Keyword(s):  
Bearing Capacity ◽  
Shell Structure ◽  
Single Layer ◽  
Ultimate Bearing Capacity ◽  
Shell Structures ◽  
High Rise ◽  
Element Simulation

The ultimate bearing capacity of the single-layer latticed shell structure, calculated without considering the single-member instability(P-δ effect), was not consistent to the actual value of ultimate bearing capacity in practice. It was studied in detail that the ultimate bearing capacity of the single-layer latticed shell structure considering the member instability by proposing a method of multi-element simulation. The value of the ultimate bearing capacity decreased by 15.6% after considering the member instability taking a single-layer latticed shell structure with a 40m span as example. The analysis results show that the value of ultimate bearing capacity is significantly affected for the single-layer latticed shell structure with a small span and high rise-span ratio

Comparison of Analytical Solutions with Finite Element Solutions for Ultimate Bearing Capacity of Strip Footings

2013 ◽  
Vol 353-356 ◽  
pp. 3294-3303
Author(s):  
Zi Hang Dai ◽  
Xiang Xu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Bearing Capacity ◽  
Analytical Solutions ◽  
Numerical Solutions ◽  
Slip Surface ◽  
Ultimate Bearing Capacity ◽  
The Finite Element Method ◽  
Strip Footings ◽  
Element Method

The finite element method is used to compute the ultimate bearing capacity of a fictitious strip footing resting on the surface of c-φ weightless soils and a real strip footing buried in the c-φ soils with weight. In order to compare the numerical solutions with analytical solutions, the mainly existing analytical methods are briefly introduced and analyzed. To ensure the precision, most of analytical solutions are obtained by the corresponding formulas rather than table look-up. The first example shows that for c-φ weightless soil, the ABAQUS finite element solution is almost identical to the Prandtls closed solutions. Up to date, though no closed analytical solution is obtained for strip footings buried in c-φ soils with weight, the numerical approximate solutions obtained by the finite element method should be the closest to the real solutions. Apparently, the slip surface disclosed by the finite element method looks like Meyerhofs slip surface, but there are still some differences between the two. For example, the former having an upwarping curve may be another log spiral line, which begins from the water level of footing base to ground surface rather than a straight line like the latter. And the latter is more contractive than the former. Just because these reasons, Meyerhofs ultimate bearing capacity is lower than that of the numerical solution. Comparison between analytical and numerical solutions indicates that they have relatively large gaps. Therefore, finite element method can be a feasible and reliable method for computations of ultimate bearing capacity of practical strip footings.

Simulation and Study on Ultimate Bearing Capacity of Stretcher Bracket for Aeromedical Evacuation

2013 ◽  
Vol 397-400 ◽  
pp. 559-563
Author(s):  
Jun Lin Wan ◽  
Kang Lv ◽  
Qin Jian Mao ◽  
Yuan Yuan Zhou ◽  
Shan Shan Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Bearing Capacity ◽  
Limit Load ◽  
Ultimate Bearing Capacity ◽  
Structure Design ◽  
Civil Aviation ◽  
The Finite Element Method ◽  
Aeromedical Evacuation ◽  
Security And Reliability

As the important airborne equipment of casualty aeromedical evacuation, the structure design of aeromedical evacuations stretcher bracket not only has to meet the mounting interface in the civil aviation aircraft and meet the medical rescue requirements during the casualty evacuation, and also has the good bearing capacity of limit load. A structure design of frame-type aeromedical evacuations stretcher bracket is presented in this paper. Based on the finite element method (FEM), the ultimate bearing capacity of the bracket attachment of this structure is analyzed with nonlinear mechanics, and then the intensity and stiffness under the case combinations of limit load are simulated and analyzed to ensure the good security and reliability of the stretcher bracket during the casualty aeromedical evacuation.

Research on Ultimate Bearing Capacity of Single-Layer Cylinder Latticed Shells Considering the Influence of P-δ Effect

2012 ◽  
Vol 238 ◽  
pp. 589-592
Author(s):  
Wen Feng Du ◽  
Zhi Yong Zhou ◽  
Pei Zhu
Keyword(s):  
Bearing Capacity ◽  
Shell Structure ◽  
Single Layer ◽  
Ultimate Bearing Capacity ◽  
High Rise ◽  
Element Simulation

The ultimate bearing capacity of the single-layer cylinder latticed shell structure, calculated without considering the single-member instability(P-δ effect), was not consistent to the actual value of ultimate bearing capacity in practice. The ultimate bearing capacity of the single-layer cylinder latticed shell structure was studied in detail by proposing a method of multi-element simulation, considering the member instability. The value of the ultimate bearing capacity decreased by 1.2% after considering the member instability taking a single-layer latticed shell structure with a 40m span as example. The analysis results show that the value of ultimate bearing capacity is tiny affected for the single-layer cylinder latticed shell structure with a small span and high rise-span ratio

Out-of-Plane Stability Analysis of Combined Boom System with Main Jib and Fly Jib

2014 ◽  
Vol 685 ◽  
pp. 217-223
Author(s):  
Peng Lan ◽  
Teng Fei Wang ◽  
Nian Li Lu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
Bearing Capacity ◽  
The Finite Element Method ◽  
Torsional Deformation ◽  
Out Of Plane ◽  
Dip Angle ◽  
The Stability ◽  
Deformation Compatibility

The objective of this study is to develop an analytical method for the out-of-plane stability of combined boom system with main jib and fly jib. Boundary conditions and deformation compatibility equations are introduced to get the analytical expression of out-of-plane buckling characteristic equation by establishing the bending and torsional deformation differential equations of jibs and the strut under the instability critical state. The analytical results obtained agree well with the finite element method (FEM) results. The influence of the dip angle between the main jib and the fly jib on the stability of the boom system is discussed. And the comparison between the combined boom system and the bending beam-column in the stable bearing capacity is made. It is shown that the upwards-bend boom system is much stronger than the downwards-bend boom system. There exists a certain dip angel between the main jib and the fly jib that makes the stable bearing capacity biggest. By comparing the stable bearing capacity of boom system with that of the bending beam-column, it is obtained that the flexible tension system will significantly improve the stable bearing capacity of the bending beam-column.

Finite Element Analysis for Unstiffened Overlapped CHS K-Joints Welded in Different Ways

2012 ◽  
Vol 446-449 ◽  
pp. 533-536
Author(s):  
Xiu Li Wang ◽  
Peng Chen ◽  
Wen Wei Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Ultimate Capacity ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Element Method

In this paper，the ultimate bearing capacity of unstifened overlapped CHS K-joints is investigated by using the finite element method with influence of weld and non-weld on joint ultimate capacity under brace different bearing capacity. with angle of chord and brace is increasing ultimate capacity to lowed more and more small，which hidden weld is non-weld by one brace is pulled and other is pressured. ultimate capacity no influence to hidden welded and non-welded by both brace is pulled.

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