DEM Algorithm for Progressive Collapse Simulation of Single-Layer Reticulated Domes under Multi-Support Excitation

2017 ◽  
Vol 23 (1) ◽  
pp. 18-45 ◽  
Author(s):  
Lingling Xu ◽  
Jihong Ye
Keyword(s):  
Progressive Collapse ◽  
Single Layer ◽  
Collapse Simulation ◽  
Reticulated Domes ◽  
Support Excitation

Damage and Risk Assessment for Single-Layer Reticulated Domes Subject to Explosive Blast Loads

2017 ◽  
Vol 17 (09) ◽  
pp. 1750108 ◽  
Author(s):  
X. D. Zhi ◽  
M. G. Stewart
Keyword(s):  
Structural Damage ◽  
Progressive Collapse ◽  
Dynamic Performance ◽  
Single Layer ◽  
Standoff Distance ◽  
Protective Measure ◽  
Blast Loads ◽  
Structural Dynamic ◽  
Damage States ◽  
Reticulated Domes

In order to provide a better understanding of the dynamic behavior of single-layer reticulated domes subjected to explosive blast loads, a number of analyses are carried out on structures with different standoff distances ([Formula: see text]), explosive weights ([Formula: see text]), rise–span ratios ([Formula: see text] and other parameters. An equation for a structural damage factor is proposed to evaluate structural damage quantitatively. The damage states for single-layer reticulated domes are defined based on their structural dynamic performance and corresponding damage factors. Structural reliabilities for different standoff distances are obtained using the Monte-Carlo Analysis. A typical protective measure is bollards which are used to help ensure a minimum standoff distance. To illustrate the cost-effectiveness of such a protective measure, structural damage states and various losses, including direct and indirect economic loss and maimed and fatality loss, are considered for assessing the risk reduction, costs and benefits. It was found that the bollards significantly reduce the likelihood of structural progressive collapse or severe damage, and the optimal standoff distance can be determined.

Progressive Collapse Mechanics of Reticulated Dome under Impact

2011 ◽  
Vol 255-260 ◽  
pp. 1760-1764
Author(s):  
Duo Zhi Wang ◽  
Jun Wu Dai ◽  
Feng Fan ◽  
Xu Dong Zhi
Keyword(s):  
Kinetic Energy ◽  
Potential Energy ◽  
Strain Energy ◽  
Failure Modes ◽  
Impact Load ◽  
Progressive Collapse ◽  
Single Layer ◽  
Initial Kinetic Energy ◽  
Impact Zone ◽  
Reticulated Domes

FE models of both the single-layer Kiewitt reticulated domes and the impactor were developed incorporating ANSYS/LS-DYNA. Three failure modes for Kiewitt reticulated dome under impact load are discerned. Moreover, Global collapse of structure belongs to the progressive collapse, and is the most serious failure. After this, stress of members, velocity and strain energy of each component are introduced to display the progressive process of collapse. It shows that the dome does not defend impact load as a whole. Each component of structure is impacted and dented in turn. And the collapse enlarges from impact zone to the supports of dome. Furthermore, collapse relates to energy transform among kinetic energy, stain energy and potential energy of structure. Moreover, collapse will continue, if initial kinetic energy and release of potential energy of structure exceed the strain needed.

scholarly journals Study on progressive collapse resistance of single-layer reticulated shells

2021 ◽  
Vol 1777 (1) ◽  
pp. 012037
Author(s):  
R Han ◽  
T Y Yin ◽  
X D Yang ◽  
Y Zhang ◽  
Y S Zhang ◽  
...  
Keyword(s):  
Progressive Collapse ◽  
Single Layer ◽  
Collapse Resistance

Vulnerability and Risk Assessment of Single-Layer Reticulated Domes Subjected to Earthquakes

2012 ◽  
Vol 138 (12) ◽  
pp. 1505-1514 ◽  
Author(s):  
X. D. Zhi ◽  
G. B. Nie ◽  
F. Fan ◽  
S. Z. Shen
Keyword(s):  
Risk Assessment ◽  
Single Layer ◽  
Reticulated Domes

scholarly journals Estimation of resonance characteristics of single-layer surface-plasmon sensors in liquid solutions using Fano’s approximation in the visible and infrared regions

2019 ◽  
Vol 43 (4) ◽  
pp. 596-604 ◽  
Author(s):  
D.V. Nesterenko ◽  
R.A. Pavelkin ◽  
S. Hayashi
Keyword(s):  
Surface Plasmon ◽  
Single Layer ◽  
Field Enhancement ◽  
Coupled Mode Theory ◽  
Mid Infrared ◽  
Coupled Mode ◽  
Sensing Applications ◽  
Resonance Response ◽  
Liquid Solutions ◽  
Support Excitation

In this work, we consider the use of planar sensing structures, which support excitation of surface plasmon polarition (SPP) modes, for detecting changes in solvents, i.e. water, ethanol, isopropanol. In the structures under study, SPP modes propagate along the interfaces between metals and general solvents. The analysis of characteristics of the resonance response is based on Fano’s approximation within the coupled-mode theory in the visible and infrared regions. The maximum sensitivity and field enhancement are revealed in the near- and mid-infrared regions in the case of ethanol and isopropanol, which enables sensing applications beyond the regions of water absorption.

Failure modes and failure mechanisms of single-layer reticulated domes subjected to interior blasts

2018 ◽  
Vol 132 ◽  
pp. 208-216 ◽  
Author(s):  
Jialu Ma ◽  
Feng Fan ◽  
Lingxin Zhang ◽  
Chengqing Wu ◽  
Xudong Zhi
Keyword(s):  
Failure Modes ◽  
Failure Mechanisms ◽  
Single Layer ◽  
Reticulated Domes
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