Analysis of the Member Buckling Influence to the Stability of Single-Layer Lattice Dome

2014 ◽  
Vol 578-579 ◽  
pp. 8-15
Author(s):  
Teng Fei Ma ◽  
Jiang Wang ◽  
Hui Zhou ◽  
Zhen Wu Wang ◽  
Zong Yun Mo ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Single Layer ◽  
Systematic Analysis ◽  
Geometric Imperfection ◽  
Initial Geometric Imperfection ◽  
Overall Stability ◽  
The Stability

Stability analysis is a key proplem for single layer lattice dome structures. single layer lattice dome structures before the overall instability of member instability may exist, but in the current single layer lattice dome structures stability analysis considering the influence of single layer lattice dome structures node defects only without considering the influence of the member buckling.Considering the initial geometric imperfection of single layer lattice dome structures in this paper, on the basis of initial defects of member with initial bending simulation, and the single layer lattice dome structures is different to weaken the position of member and make the member buckling before single layer lattice dome structures overall instability, systematic analysis of the member buckling effect on the overall stability of the single layer lattice dome structures.

Effects of Initial Geometric Imperfection on Stability of Single-Layer Reticulated Shell

2011 ◽  
Vol 368-373 ◽  
pp. 276-279
Author(s):  
Fei Hua Zheng ◽  
Jin Song Lei ◽  
Wen Zhi Yin
Keyword(s):  
Finite Element ◽  
Shell Structure ◽  
Single Layer ◽  
Initial Imperfection ◽  
Limited Capacity ◽  
Geometric Imperfection ◽  
Finite Element Software ◽  
Initial Geometric Imperfection ◽  
Overall Stability ◽  
The Stability

The stability of reticulated shell is a key issue for single-layer reticulated shell. In the paper, a single-layer arch-supported shell structure was analyzed by finite element software MIDAS. The eigenvalue buckling analysis and the geometric nonlinear overall stability analysis with initial imperfection of the model which carried two different load combinations were studied too. At the same time, the influences on the stability of the shell structure were researched. The results showed that the shell structure was sensitive to the initial imperfection. Under different load combinations, the instability of modes and limited capacity of stability are different in the shell structure.

Analysis of Nonlinear Buckling of a Long-Span Elliptic Paraboloid Suspended Dome Structure

2013 ◽  
Vol 639-640 ◽  
pp. 191-197 ◽  
Author(s):  
Zheng Rong Jiang ◽  
Kai Rong Shi ◽  
Xiao Nan Gao ◽  
Qing Jun Chen
Keyword(s):  
Single Layer ◽  
Buckling Mode ◽  
Nonlinear Buckling ◽  
Elliptic Paraboloid ◽  
Geometric Imperfection ◽  
Long Span ◽  
Initial Geometric Imperfection ◽  
Dome Structure ◽  
Unsymmetrical Loading ◽  
The Stability

The suspended dome structure, which is a new kind of hybrid spatial one composed of the upper single layer latticed shell and the lower cable-strut system, generally has smaller rise-to-span ratio, thus the overall stability is one of the key factors to the design of the structure. The nonlinear buckling behavior of an elliptic paraboloid suspended dome structure of span 110m80m is investigated by introducing geometric nonlinearity, initial geometric imperfection, material elastic-plasticity and half-span distribution of live loads. The study shows that the coefficient of stable bearing capacity usually is not minimal when the initial geometric imperfection configuration is taken as the first order buckling mode. The unsymmetrical loading distribution and the material nonlinearity might have significant effects on the coefficient. The structure is sensitive to the changes of initial geometric imperfection, and the consistent mode imperfection method is not fully applicable to the stability analysis of suspended dome structure.

Parameter Analysis on Stability of a Suspendome

2005 ◽  
Vol 20 (2) ◽  
pp. 115-124 ◽  
Author(s):  
Zhi-Hua Chen ◽  
Yang Li
Keyword(s):  
Structural Parameters ◽  
Engineering Application ◽  
Single Layer ◽  
Parameter Analysis ◽  
Space Structures ◽  
Buckling Mode ◽  
Geometric Imperfection ◽  
Stability Performance ◽  
Initial Geometric Imperfection ◽  
The Stability

As a kind of hybrid space structures, the suspendome system increases the stiffness and improves the stability of the original dome system by the appropriate use of prestressing cables. Based on the engineering application of suspendome in Tianbao Center (completed in China, 2002), the present paper concentrates on the stability performance of the suspendome with a span of 35.4m using different structural parameters, including the rise-span ratio, magnitude and level settings of initial prestressing in cables, connection rigidity and boundary support condition. Stability performances including buckling mode, critical loads and sensitivity to initial geometric imperfection are studied in detail, and contrast analyses with the corresponding singly-layer shells are carried out to study the superiorities of the suspendome over the single-layer shell. Some valuable conclusions are drawn for practical design.

Stability Analysis of the Radiant Cable Suspendome

2012 ◽  
Vol 226-228 ◽  
pp. 1185-1189
Author(s):  
Jian Kang ◽  
Xiang Yu Liu
Keyword(s):  
Stability Analysis ◽  
Single Layer ◽  
Hybrid Structure ◽  
Buckling Analysis ◽  
Nonlinear Buckling ◽  
Geometrical Imperfection ◽  
String Structure ◽  
The Stability ◽  
Nonlinear Buckling Analysis ◽  
Lattice Shell

Radiant cable suspendome based on single-layer lattice shell is proposed in this paper whose cable-strut system is like that of Radiant Beam String Structure, the purpose of this paper is to do stability analysis of the structure.The linear buckling analysis of the hybrid structure and the single-layer lattice shell who has the same geometry parameters is carried out, we can preliminarily understand the stability of the hybrid structure. At the same time, nonlinear buckling analysis is carried out to study the stability of the hybrid structure under different rise-span ratios, different prestress level and half-span load. The results show that the introduction of prestressed cables greatly improve the structure's stability and reduce the structure sensitivity to original geometrical imperfection.

Stability Analyses of Single Arch in Arch-Reticulated Shell Hybrid Steel Structure of Beijing Jiangtai Winter Garden

2011 ◽  
Vol 94-96 ◽  
pp. 1328-1333 ◽  
Author(s):  
Yong Jiu Shi ◽  
Yang Gao ◽  
Yuan Qing Wang ◽  
Xiao Ping He
Keyword(s):  
Full Range ◽  
Great Influence ◽  
Steel Structure ◽  
Steel Structures ◽  
Hybrid Structure ◽  
Curtain Wall ◽  
Geometric Imperfection ◽  
Initial Geometric Imperfection ◽  
Arch Structure ◽  
The Stability

Global stability analysis cannot be ignored for large-span spatial steel structures. Beijing Jiangtai Winter Garden adopts hybrid structure with latticed shell and vertical cables, on which glass curtain wall is fixed. Therein the reticulated shell is composed of 9 spatial arches and other common frames, thus it can be seen as arch-reticulated shell hybrid structure. This paper analyzes the stability of one single arch structure which has the largest span in the whole structure, including buckling analyses and non-linear full range analyses. The results show that the stability of single arch meets requirements, and the nonlinearity has great influence on the stability of single arch structure. Besides, although the initial geometric imperfection has certain effect on the elastic structure, it has little effect on the elasto-plastic one.

scholarly journals DESIGN OF RETAINING WALL USING ALTERNATIVE GABION AND RETAINING WALLS OF CANTILEVER TYPE ON SLOPE OPEN SPACE GREEN JL. KINIBALU BANJARBARU

CERUCUK ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 69
Author(s):  
Adelina Melati Sukma
Keyword(s):  
Stability Analysis ◽  
Safety Factor ◽  
Carrying Capacity ◽  
Rainy Season ◽  
Open Space ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Stability Calculation ◽  
Overall Stability ◽  
The Stability

On the construction of green open space Jl. Kinibalu Banjarbaru There is a 6 meters tall slope beneath which the river is lined up during the rainy season and makes the slope exposed by water plus the absence of load or traffic on it make the pore figures on the land is large. Therefore, for protection reason, there is a soil alignment in the construction of soil retaining walls. The planned ground retaining wall type is cantilever and gabion. The stability analysis of the ground retaining walls is done manually and with the help of the Geoslope/W 2018 software. The value of the stability of the style against the bolsters, sliding, and carrying capacity of the soil using manual calculations for cantilever type and Netlon qualifies SNI 8460:2017. And for the overall stability calculation using Geoslope/W 2018 software obtained safety factor (SF) > 1.5. From the analysis, the design of planning can be used because it is safe against the dangers of avalanche.

Stability Analysis of Latticed Shells

2014 ◽  
Vol 1078 ◽  
pp. 220-223
Author(s):  
Wen Bin Shi
Keyword(s):  
Stability Analysis ◽  
Load Distribution ◽  
Single Layer ◽  
Displacement Curve ◽  
Distribution Form ◽  
Overall Stability ◽  
Initial Geometric Imperfections ◽  
Lattice Shell ◽  
Geometric Nonlinear Analysis ◽  
Initial Geometry

ANSYS14.0 structural analysis software is used in order to make a ring rib-reticulated shell for the overall stability analysis. Considering the geometric nonlinear analysis and initial geometric imperfections influence , obtain a key node of the load - displacement curve and assess the ultimate strength of the structure. The results showed that: the structure meets the "Space grid rules" for monolayer shells stability requirements. And it is found that load distribution form and initial geometry defect has a great deal whit bearing capacity of single-layer lattice shell stability by comparison.

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.

Stability of cable-supported spherical reticulated shell with tension members

2020 ◽  
Vol 35 (3) ◽  
pp. 69-79
Author(s):  
Zhen Lu ◽  
Hui-jun Li ◽  
Chao Wang
Keyword(s):  
Carrying Capacity ◽  
Single Layer ◽  
Buckling Analysis ◽  
Load Carrying Capacity ◽  
Geometric Imperfection ◽  
Tension Member ◽  
Load Carrying ◽  
Initial Geometric Imperfection ◽  
Asymmetric Load ◽  
Tension Members

The suspendome has been widely employed in large-span space structures in recent years, and it has stronger structural stiffness and higher load-carrying capacity than single-layer spherical reticulated shell. In general, it is negligible for enhancement of load-carrying capacity to integrate cables and struts into the inner ring of reticulated shell. Based on the suspendome structure, a new hybrid space structure system, namely, cable-supported reticulated shell with tension member, is proposed in this study. To elucidate and verify its feasibility, the buckling mode and buckling form are obtained by the eigenvalue buckling analysis and nonlinear buckling analysis using ANSYS package, respectively. Furthermore, to determine the optimal structural form, this article investigates the effect of the main ribbed strut length, the initial geometric imperfection, asymmetric load, pretension in cables, and the material nonlinearity on its stability. The result shows that the proposed new structural system is of high load-carrying capacity. Tension member integrated to cable-supported reticulated shell can effectively improve the overall stiffness and greatly reduce the deformation of spherical reticulated shell. The plastic failure shape occurs with the similar pattern. The instable region mainly occurs on the main ribs with tension members, and each main rib only has one local failure dimple. The load-carrying capacity is remarkably affected by the asymmetric load, the initial geometric imperfection, and material nonlinearity. Based on the parametric analyses, Type C is the optimal choice, that is, appending cables and struts to the outermost ring of single-layer spherical reticulated shell, and arranging out-of-plane tension members under the four main ribs.

Sign in / Sign up

Export Citation Format

Share Document