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

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

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.

Elasto-Plastic Bearing Capacity of Four Types of Single-Layer Reticulated Shell Structures Under Fire Hazards

2015 ◽  
Vol 15 (03) ◽  
pp. 1450051
Author(s):  
Yin Bai ◽  
Lu Yang ◽  
Lingfeng Gong
Keyword(s):  
High Temperature ◽  
Bearing Capacity ◽  
Single Layer ◽  
Critical Factor ◽  
Shell Structures ◽  
Nonuniform Temperature ◽  
Fire Hazards ◽  
Ambient Temperatures ◽  
Practical Design ◽  
Fire Conditions

Single-layer reticulated shells are widely used in spatial structures. One critical factor that has to be considered in the design of reticulated shells is the significant adverse impact of high temperature caused by fire on the structures. In order to study the variation of elasto-plastic bearing capacity under high temperature by fire, four types of single-layer reticulated shells (i.e. K6, Geodesic, Schwedler and Lamella) are investigated under two typical fire conditions (i.e. global nonuniform temperature distribution and local high temperature) by the geometrically and materially nonlinear analysis and statistical methods. Practical design formulae for calculating the elasto-plastic bearing capacity of reticulated shell structures under different fire conditions and ambient temperatures are proposed based on the numerical simulation results.

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.

Distinct element simulation of ultimate bearing capacity in jointed rock foundations

2012 ◽  
Vol 6 (11) ◽  
pp. 4427-4434 ◽  
Author(s):  
Hossein Salari-Rad ◽  
Mohammad Mohitazar ◽  
Morteza Rahimi Dizadji
Keyword(s):  
Bearing Capacity ◽  
Distinct Element ◽  
Jointed Rock ◽  
Ultimate Bearing Capacity ◽  
Rock Foundations ◽  
Element Simulation

Mechanism Analysis on Concrete Column’s Recovery Strengthening

2014 ◽  
Vol 941-944 ◽  
pp. 707-711
Author(s):  
Zhi Peng Lai ◽  
Shao Hua Guo
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Concrete Columns ◽  
Ultimate Bearing Capacity ◽  
Theoretical Research ◽  
Concrete Column ◽  
Mechanism Analysis ◽  
Axial Deformation ◽  
Element Simulation ◽  
And Control

This paper deals with the behavior of concrete columns actuated by SMA wires winding around the column’s cylindrical surface, when the concrete column are constrained and driven in circumferential direction by the SMA wires, the column’s ultimate bearing capacity and axial deformation are mainly studied. Both theoretical research and finite element simulation are carried out. The results indicate that, the SMA’s limited recovery in reverse transformation by heating can generate circumferential prestress, which will improve the concrete column’s ultimate bearing capacity and control its deformation, so as to realize the concrete column’s recovery strengthening.

scholarly journals A Spiral Single-Layer Reticulated Shell Structure: Imperfection and Damage Tolerance Analysis and Stability Capacity Formulation for Conceptual Design

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 280
Author(s):  
Huijuan Liu ◽  
Fukun Li ◽  
Hao Yuan ◽  
Desheng Ai ◽  
Chunli Xu
Keyword(s):  
Bearing Capacity ◽  
Conceptual Design ◽  
Shell Structure ◽  
Structural Damage ◽  
Geometric Model ◽  
Single Layer ◽  
Tolerance Analysis ◽  
Engineering Practice ◽  
Bionic Structure ◽  
Reticulated Shell Structure

Single-layer reticulated shell structures are widely used, but their stability performance is not ideal. Moreover, they are sensitive to structural damage and imperfections, while the existing conventional design methods of increasing the cross-section, strengthening corrosion protection, and densifying the structural grid are not economical. This study employs a modified and bionic structure—a spiral single-layer reticulated shell structure—to solve the problem. First of all, according to the current Chinese design codes, its mathematical model and geometric model are designed. Then, its damage and imperfection tolerances are analyzed and compared with a traditional single-layer reticulated shell. We then propose a universal bearing capacity formula. Our research conclusions prove that the spiral single-layer reticulated shell structure has a higher tolerance to damage and imperfections while maintaining stability. Moreover, the precise bearing capacity formula proposed will help engineers to efficiently select the structure configurations in the conceptual design phase. Therefore, the spiral single-layer reticulated shell structure is worthy of popularization and application in engineering practice.

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