Static performance of a new type of corrugated steel-concrete composite shell under mid-span loading

The long-span ice composite shell structure is a new type of ice and snow structure developed in recent years. The engineering practice of ice composite shell shows that sublimation is one of the important reasons for its damage and even collapse. In this paper, we firstly supplemented the existing H-K equation and obtained the revised ice sublimation equation through indoor evaporative plate experiment considering the influence of admixtures and wind speed. Afterwards, combining the simulations of solar radiation and CFD, the numerical simulation of sublimation distribution on the surface of were realized by programming in Grasshopper platform. During sublimation, the thickness of the ice composite shell decreases by 0.38 mm every 10 days and the sublimation rate on the sunny side was 1.7 times that on the shady side. Finally, the static performance and stability of the sublimated ice composite spherical shell were analyzed. After 70 days of sublimation, the thickness of the ice composite shell structure becomes thinner and uneven, which leads its sensitivity to external load increases.

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Erratum: “Experimental study on dynamic and static performance of a new type of pressure-absorbing energy bolt system” [AIP Adv. 11, 075124 (2021)]

AIP Advances ◽

10.1063/5.0063971 ◽

2021 ◽

Vol 11 (9) ◽

pp. 099901

Author(s):

Yi Zhang ◽

Qiyu Chen ◽

Wei Zhang ◽

Zhiying Lu ◽

Youbao Ma ◽

...

Keyword(s):

Experimental Study ◽

Static Performance ◽

New Type

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Nonlinear Numerical Analysis on a New Type of Composite Shell

Computational Structural Engineering ◽

10.1007/978-90-481-2822-8_117 ◽

2009 ◽

pp. 1043-1050

Author(s):

Qibin Zhang ◽

Zhuobin Wei ◽

Changhong Huang

Keyword(s):

Numerical Analysis ◽

Composite Shell ◽

New Type

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Design and 3D CFD Static Performance Study of a Two-Blade IceWind Turbine

Energies ◽

10.3390/en13205356 ◽

2020 ◽

Vol 13 (20) ◽

pp. 5356

Author(s):

Hamdy Mansour ◽

Rola Afify

Keyword(s):

Wind Turbine ◽

Three Dimensional ◽

Vertical Axis ◽

Scale Model ◽

Vertical Axis Wind Turbine ◽

Performance Study ◽

Static Performance ◽

New Type ◽

Torque Values ◽

Static Torque

The IceWind turbine, a new type of Vertical Axis Wind Turbine, was proposed by an Iceland based startup. It is a product that has been featured in few published scientific research studies. This paper investigates the IceWind turbine’s performance numerically. Three-dimensional numerical simulations are conducted for the full scale model using the SST K-ω model at a wind speed of 15.8 m/s. The following results are documented: static torque, velocity distributions and streamlines, and pressure distribution. Comparisons with previous data are established. Additionally, comparisons with the Savonius wind turbine in the same swept area are conducted to determine how efficient the new type of turbine is. The IceWind turbine shows a similar level of performance with slightly higher static torque values. Vortices behind the IceWind turbine are confirmed to be three-dimensional and are larger than those of Savonius turbine.

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Static Analysis of Mega Steel Frame-Cable System Bracing Structure

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.744-746.298 ◽

2015 ◽

Vol 744-746 ◽

pp. 298-303

Author(s):

Si Qi Yang ◽

Jun Hua Cai ◽

Jia Chen ◽

Bai Jian Tang

Keyword(s):

Steel Structure ◽

Internal Force ◽

Steel Frame ◽

Vertical Load ◽

Cable System ◽

Structure Deformation ◽

Load Combination ◽

Static Performance ◽

New Type ◽

Prestressed Steel Structure

In order to study the static performance of a new type e vertical prestressed steel structure called mega steel frame-cable bracing structure, structure deformation, internal force of beam and column and the remaining pretension of cable under pretension, vertical load and horizontal load alone as well as pretension with vertical load, wind load combination condition were analyzed in this paper. Research shows that prestressed cable can effectively improve mechanical and deformation performance of mega beam under vertical load, improve the system stiffness and make the overall stiffness more uniform.

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Research on Dynamic Response of Concrete-Filled Steel Tube Columns Confined with FRP under Blast Loading

Shock and Vibration ◽

10.1155/2019/8692310 ◽

2019 ◽

Vol 2019 ◽

pp. 1-18 ◽

Cited By ~ 2

Author(s):

Jing Dong ◽

Junhai Zhao ◽

Dongfang Zhang ◽

Yingping Li

Keyword(s):

Numerical Model ◽

Dynamic Response ◽

Blast Resistance ◽

Concrete Strength ◽

Blast Loading ◽

Steel Tube ◽

Element Analysis ◽

Concrete Filled Steel Tube ◽

Static Performance ◽

New Type

Recently, a concrete-filled steel tube confined with fiber-reinforced polymer (FRP) has become a hot research issue as a new type of structure. These studies mainly focus on its static performance and seismic and impact behaviour, with little research on its blast resistance performance. In this study, the dynamic response of concrete-filled steel tube columns confined with FRP under blast loading was investigated. Numerical analysis was implemented using multimaterial ALE method in the finite element analysis program LS-DYNA. The proposed numerical model was validated by the SDOF result and available experimental data. And the effects of the number of FRP layers, concrete strength, and cross section were also discussed in detail based on the proposed numerical model. The results indicate that the constraints of FRP effectively enhance the blast resistance of the column, and the vulnerable parts mainly occur at the middle and two ends of the column. The blast resistance of the column can be enhanced by increasing the number of FRP layers or concrete strength. These results could provide a certain basis for blast resistance design of concrete-filled steel tubes confined with FRP.

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Design and Static-Performance Evaluation of Concrete-Filled-Tube Rock Shed Structure

Korean Society of Hazard Mitigation ◽

10.9798/kosham.2020.20.5.165 ◽

2020 ◽

Vol 20 (5) ◽

pp. 165-173

Author(s):

Juho Lee ◽

Hyeoung-Deok Lee ◽

Jong-Keol Song ◽

Jiho Moon

Keyword(s):

Performance Evaluation ◽

Debris Flow ◽

Static Analysis ◽

Static Load ◽

The Road ◽

Equivalent Static Load ◽

Static Performance ◽

New Type ◽

Cut Slopes ◽

Rockfall Protection

Rockfall protection facilities are necessary to reduce damages from rockfall or debris flow on roads near steep cut slopes. In Korea, rockfall protection fences and rock sheds are widely utilized for rockfall protection facilities. The rock shed is made of reinforced concrete or steel in the shape of a tunnel, and it is used for protecting the road from massive rockfall (up to 3,000 kJ of rockfall energy). In this study, a new type of rock shed comprising a Concrete-Filled-Tube (CFT) was designed. First, the proposed CFT rock shed could resist up to 3,000 kJ rockfall energy. Next, the performance of the CFT was verified through static analysis in which the 3,000 kJ rockfall energy was considered as the equivalent static load.

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Experimental study on wheel-spoke crossed cable structures

Advances in Structural Engineering ◽

10.1177/1369433218773456 ◽

2018 ◽

Vol 21 (15) ◽

pp. 2340-2355

Author(s):

Zongyu Hu ◽

Jun Wang ◽

Jida Zhao ◽

Yiyi Chen

Keyword(s):

Finite Element ◽

Structural Parameters ◽

Test Results ◽

Element Analysis ◽

Static Test ◽

Cable Structure ◽

Vertical Displacements ◽

Static Performance ◽

New Type ◽

Internal Forces

Wheel-spoke crossed cable structure is a new type of cable-strut structure. In this article, the tension forming and static performance of wheel-spoke crossed cable structure are experimentally investigated by testing four scale models under full-span and half-span downward uniform load, and the effect of structural parameters including variable prestress level, height difference between inner ring and outer ring, and layer height of inner ring is studied by finite element method as well. The test results indicate that radial cables tensioning scheme is effective for wheel-spoke crossed cable structure to reach initial prestress state, and wheel-spoke crossed cable structure possesses excellent load-carrying capacity and structural stiffness since internal forces and vertical displacements of models vary almost linearly under such load cases. Moreover, the static test results are in good agreement with the finite element analysis results, confirming that the model design, measurement methods, and loading schemes are reasonable. Therefore, the results of this study can provide valuable reference for the design and application of wheel-spoke crossed cable structure.

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