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.

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.

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 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.

Behavior and Design of Web-Slotted Cold-Formed Channels Experiencing Local-Distortional-Global Interactive Buckling

2013 ◽  
Vol 351-352 ◽  
pp. 747-752
Author(s):  
Shuai Liu ◽  
Qi Jie Ma ◽  
Pei Jun Wang
Keyword(s):  
Effective Width ◽  
The Finite Element Method ◽  
Distortional Buckling ◽  
Buckling Mode ◽  
Geometric Imperfection ◽  
Interactive Behavior ◽  
Buckling Behavior ◽  
Initial Geometric Imperfection ◽  
Interactive Buckling ◽  
Shed Light

This article aims to shed light on the nonlinear local-distortional-global interactive behavior of web-slotted channel columns by use of the finite element method. The effects of three kinds of initial geometric imperfection based on different distortional buckling mode were evaluated. It indicates that different distortional buckling mode does little difference on the nonlinear interactive buckling behavior of web-slotted channels. Based on the extensive parametric study, some modifications were made to the traditional Effective Width Method for the practical design of web-slotted channel columns undergoing local-distortional-global interactive buckling.

Buckling mechanism of cable-stiffened lattice shells with bolted connections

2019 ◽  
Vol 22 (15) ◽  
pp. 3234-3248
Author(s):  
Xi Wang ◽  
Ruo-qiang Feng ◽  
Gui-rong Yan ◽  
Bao-chen Zhu ◽  
Feng-cheng Liu
Keyword(s):  
Bolted Joints ◽  
Bolted Connections ◽  
Elliptic Paraboloid ◽  
Buckling Loads ◽  
Geometric Imperfection ◽  
Initial Geometric Imperfection ◽  
In Series ◽  
Lattice Shell ◽  
Rigid Joints ◽  
Lattice Shells

The cable-stiffened lattice shell is a new structural system for its translucence and lighting. This article discusses the effect of the connections’ behavior and geometric imperfection on the structural stability and reveals the buckling mechanism of the cable-stiffened lattice shell. The spring stiffness for bolted connections of cable-stiffened lattice shells is deduced from the spring in series model. The buckling mechanism of cable-stiffened lattice shells with three types of joints have been studied based on the prototypical static experiments of bolted connections. The decrease of bolted connections’ stiffness would lead to the change in the displacement distribution for the lattice shell under its ultimate load. The buckling loads and initial structural stiffness of cable-stiffened lattice shells with shim-strengthened bolted joints are approximately 80% of those for cable-stiffened lattice shells with rigid joints. The result indicates that the buckling loads of cable-stiffened lattice shells with bolted connections decrease much more slowly than the decrease of bolted connections’ stiffness. The cable-stiffened lattice shell with SBP connections is more sensitive to the initial geometric imperfection. Finally, a formula has been proposed for estimating buckling loads of elliptic paraboloid cable-stiffened lattice shells with bolted connections.

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.

The Stability of Elliptic Paraboloid Grid Shell Lighting Roofs with Semi-Rigid Joints

2011 ◽  
Vol 374-377 ◽  
pp. 2148-2151 ◽  
Author(s):  
Ruo Qiang Feng ◽  
Bin Yao ◽  
Ji Hong Ye
Keyword(s):  
Bearing Capacity ◽  
Single Layer ◽  
Initial Imperfection ◽  
Parametric Modeling ◽  
Elliptic Paraboloid ◽  
Grid Shell ◽  
Steel Bars ◽  
New Type ◽  
The Stability ◽  
Rigid Joints

Grid shell is a new type of single layer latticed shell. Joint connections of this structrue always adopt semi-rigid joints: in-plane pin joints, out-plane rigid joints. A parametric modeling method using self-designed program is proposed in this paper. Bearing capacity of the elliptic paraboloid grid shell with semi-rigid joints is analyzed. Then, the influence of section of steel bars, rise-span ratio and initial imperfection on the bearing capacity is investigated.

Analysis of Nonlinear Local Stability of Curved Cross Section Boom

2014 ◽  
Vol 633-634 ◽  
pp. 1161-1165
Author(s):  
Xin Lei Huang ◽  
Ai Min Ji ◽  
Ming Juan Zhu
Keyword(s):  
Residual Stress ◽  
Cross Section ◽  
Local Stability ◽  
Welding Residual Stress ◽  
Ansys Software ◽  
Nonlinear Buckling ◽  
Geometric Imperfection ◽  
Local Stability Analysis ◽  
Initial Geometric Imperfection ◽  
Practical Engineering

In order to solve the problems of local stability of telescopic boom of truck crane in practical engineering, considering the initial geometric imperfection and the welding residual stress, the nonlinear local stability analysis of telescopic boom was studied by ANSYS software. APDL command flow was used for controlling the analytical process. Firstly, the foundational theories of the nonlinear finite element method were introduced. Secondly, the influence of the initial geometric imperfection and the welding residual stress on the nonlinear buckling of the boom was studied. Finally, the nonlinear buckling critical stress value of the curved cross section boom for an example was obtained, and it was used to compare with the rectangle, hexagon and dodecagon boom, consequently, a conclusion was drawn that the ability to resist bucking of curved cross section boom was stronger.

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