scholarly journals Experimental and Numerical Studies on the Inflatable Recyclable Anchor in the Tube Piece Type Based on the Soil-Anchor Interaction Mechanism

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Chenchen Du ◽  
Taoli Xiao ◽  
Yunlong He ◽  
Xuexiang Yang
Keyword(s):  
Bearing Capacity ◽  
Interaction Mechanism ◽  
The Novel ◽  
Inflation Pressure ◽  
Analysis Model ◽  
Distribution Law ◽  
Resource Saving ◽  
Element Analysis ◽  
Steel Disc ◽  
Embedment Length

This paper deeply studies the characteristics and “uplift bearing capacity” of a novel type of inflatable recyclable anchor in the tube piece. The proposed novel inflatable recyclable anchor in the tube piece type comprises a metallic rod, an inflatable anchorage device, and a recovery device. Fifteen field uplift tests are conducted to investigate the effects of inflation pressure, thickness of the steel disc, embedment length, and time lapse between anchor inflation and pullout on “the uplift bearing capacity.” The results show that “the uplift bearing capacity” of the novel inflatable anchor in the tube piece type increases with the increase of inflation pressure, thickness of the steel disc, and embedment length. With the increase of inflation time, “the uplift bearing capacity” of the novel inflatable anchor experiences an increase after first experiencing a decrease. The finite element analysis method is used to establish a numerical analysis model of the inflatable anchor, and the distribution law of the tensile stress of the surrounding soil during the pullout of the anchor is analysed. Compared with the traditional grouted anchor, the proposed anchor has an obvious superiority in recyclability, reusability, and swifter formation of anchorage force and thus is a resource-saving and environmentally friendly anchor technology.

scholarly journals Experimental and Numerical Analysis of The Used Hollow Slab

2018 ◽  
Vol 175 ◽  
pp. 01036
Author(s):  
Xudong Hua ◽  
Xingwei Xue ◽  
Junlong Zhou ◽  
Hai Zhang
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Three Dimensional ◽  
Reinforced Concrete Structure ◽  
Analysis Model ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Long Time ◽  
Bending Capacity ◽  
Three Dimensional Finite Element

The actual bearing capacity of a bridge in active service is crucial to the structure, but such data is generally difficult to obtain. In order to obtain the actual ultimate bending capacity of the used hollow slab, a destructive test of a hollow slab, which has been used ten years, has been carried out. Moreover, based on the experimental analysis of the material parameter data, a three-dimensional finite element nonlinear analysis model of the used hollow slab was established. Through the experiment and finite element analysis of the used hollow slab, the comparisons of the failure mode, crack propagating and ultimate bending capacity were focused on. The main conclusions obtained through the study are as follows: (1) Strand is a kind of stable prestressed material, which can maintain good mechanical properties for a long time; (2) The used hollow slab still maintains good ultimate bending capacity, although underwent a decreased rigidity due to long-term cumulative damage; (3) The total strain fracture model is qualified for simulating the nonlinearity of concrete material, and can obtain the ultimate bearing capacity of reinforced concrete structure effectively as well as simulates the development of cracks well.

Compressive performance of new types of load-bearing horizontal-hole interlocking concrete hollow blocks

2018 ◽  
Vol 22 (6) ◽  
pp. 1368-1383 ◽  
Author(s):  
Shen Liu ◽  
Jingshu Zhang ◽  
Le Liu ◽  
Hang Guo ◽  
Bo Wang
Keyword(s):  
Compressive Strength ◽  
Bearing Capacity ◽  
Concrete Strength ◽  
Linear Equations ◽  
Analysis Model ◽  
Element Analysis ◽  
Load Bearing ◽  
The Finite Element Analysis ◽  
Compressive Performance ◽  
Concrete Blocks

Two series of load-bearing horizontal-hole interlocking hollow concrete blocks, referred to as H-shaped series and cross-shaped series, were developed, including three geometric types: type BH-290 (H-shaped), type BH-240 (H-shaped), and type BC-240 (cross-shaped). The research presented in this article investigated the compressive behavior of the proposed load-bearing horizontal-hole interlocking hollow concrete blocks and aimed at analyzing the influence of geometric parameters on the block capacity. First, compressive tests of the horizontal-hole interlocking hollow concrete blocks were carried out. The compressive strength, elastic modulus, and compressive failure mechanism were analyzed. Second, the feasibility of the finite element analysis model was verified by experimental results presented in this article, as well as by available test data from other researchers. The influences of vertical ribs, horizontal ribs, and concrete strength on the compressive strength of horizontal-hole interlocking hollow concrete blocks were investigated. Ultimately, based on the numerical modeling results, linear equations were proposed to predict the compressive strength of H-shaped series and cross-shaped series blocks. The results show that the compressive strengths of types BH-240, BH-290, and BC-240 are 15.9, 13.4, and 13.0 MPa, respectively. For the H-shaped series, the core horizontal rib is the key part that can significantly constrain the vertical ribs so that the block can achieve higher compressive bearing capacity. For the cross-shaped series, core horizontal ribs cannot improve the compressive strength of the block because core horizontal ribs and joints near them become damaged early. Improving the concrete strength and the width of the vertical rib can effectively improve the compressive bearing capacity for both H-shaped and cross-shaped series blocks. The accuracy of the proposed equations for predicting the compressive strength of H-shaped and cross-shaped blocks is acceptable, according to the current verification.

Residual Bearing Capacity Numerical Simulation and Theoretical Analysis of H-Shaped Steel Column Impacted under Different Axis Pressure

2014 ◽  
Vol 1065-1069 ◽  
pp. 1097-1100
Author(s):  
Yan Bai ◽  
Rui Wang ◽  
Juan Lin Cui
Keyword(s):  
Bearing Capacity ◽  
Functional Relation ◽  
Lateral Impact ◽  
Analysis Model ◽  
Element Analysis ◽  
Daily Production ◽  
Capacity Theory ◽  
Steel Column ◽  
H Beam ◽  
The Impact

H-beam is usually used as column structure of single industrial workshop, steel column will inevitably encounter lateral impact of lifting weights or factory vehicle in the process of daily production, causing its defects in material and geometry, thus the change of axial bearing capacity.This aratical takes H-shaped steel column of a factory as the research object, establishes its residual bearing capacity theory of finite element analysis model in different situations under the impact using ABAQUS software platform, discusses the load parameters analysis in axial force-impac and Launches the functional relation between axial compression ratio and impact energy, providing a basis for assessing the residual loading capacity of such members after the impact.

Non-Linear FEM Analysis of Steel Fiber Reinforced Concrete Shearwall

2010 ◽  
Vol 163-167 ◽  
pp. 1551-1554 ◽  
Author(s):  
Jun Zhao ◽  
Li Jun Wang ◽  
Dan Ying Gao
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Steel Fiber ◽  
Volume Fraction ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Analysis Model ◽  
Steel Fiber Reinforced Concrete ◽  
Element Analysis

The numerical simulation by nonfinear finite element method(FEM) was adopted to analyze the behavior and the influences of the fraction of steel fiber by volume fraction and the strength of steel fiber reinforced concrete on the bearing capacity and the ductility of reinforced concrete shearwalls. The results show that with the increase of the fraction of steel fiber by volume fraction, the bearing capacity and ductility coefficient of steel fiber reinforced concrete shearwalls increase gradually. With the increase of the strength of steel fiber reinforced concrete, the bearing capacity and ductility coefficient of steel fiber reinforced concrete shearwalls decrease. It proves the rationality of the unit type, stress-strain relation of material and failure criteria used in the finite element analysis model.

scholarly journals Differential Settlement of Intersecting Buildings in an Offshore Reclamation Project

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Jing-Bo Su ◽  
Zheng-yang Yu ◽  
Ya-Ru Lv ◽  
Yi-Huan Zhu ◽  
Hua-Qing Wang
Keyword(s):  
Bearing Capacity ◽  
Soft Soil ◽  
Differential Settlement ◽  
Design Stage ◽  
Single Pile ◽  
Soil Consolidation ◽  
Analysis Model ◽  
Element Analysis ◽  
Foundation Soil ◽  
Reclamation Project

This paper addresses the problem of open gaps caused by differential settlement in the process of constructing sluice buildings in soft soil beach areas, combined with the construction of sluice and supporting facilities in a reclamation project. First, the change rules for the shear strength and compression modulus of soft soil under different consolidation degrees are studied by theoretical analysis. Then, an interaction model for soft soil and pile soil is established using the geotechnical finite element analysis software MIDAS/GTS NX. The change rules for the vertical and horizontal ultimate bearing capacities of a single pile with the degree of soil consolidation are studied. On this basis, a three-dimensional numerical analysis model of drainage sluice, seawall, cofferdam, and foundation soil is established, and the relationship between the degree of soil consolidation and the development of structural gaps caused by differential settlement is obtained. The research results show that the bearing capacity of a single pile increases greatly with the consolidation of soil around the pile and that the gap width between the structures in the project decreases with increasing consolidation. This paper provides a theoretical basis for the prediction of pile bearing capacity in the preliminary design stage and the evaluation and calculation of differential settlement of intersecting buildings in soft soil beach areas.

scholarly journals Conductor Temperature Monitoring of High-Voltage Cables Based on Electromagnetic-Thermal Coupling Temperature Analysis

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 525
Author(s):  
Yuting Zhang ◽  
Fuhao Yu ◽  
Zhe Ma ◽  
Jian Li ◽  
Jiang Qian ◽  
...  
Keyword(s):  
Surface Temperature ◽  
High Voltage ◽  
State Parameter ◽  
Field Analysis ◽  
Shanxi Province ◽  
Thermal Coupling ◽  
Analysis Model ◽  
Distribution Law ◽  
Element Analysis ◽  
Conductor Temperature

As a key state parameter of high-voltage cables, conductor temperature is an essential determinant of the current carrying capacity of cables, but in practice, this is difficult to measure directly during the operation of high-voltage cables. In this paper, the electromagnetic-thermal coupling analysis model of a 110 kV high-voltage cable is established using the finite element analysis software COMSOL. By analyzing the temperature distribution law of high-voltage cables under different load currents and ambient temperatures, the relationship between the change in the high-voltage cable surface temperature and the conductor temperature is deduced, which allows the monitoring of the high-voltage cable conductor temperature. Taking the 110 kV cable of the Yanzhong line in Shanxi Province as an example and using the electromagnetic-thermal coupling temperature field analysis method, the conductor temperature of the high-voltage cable can be measured using the data obtained from the cable surface temperature, which is measured by the self-developed Raman Distributed Temperature Sensor (RDTS) system with a maximum measurement error of about 2 °C. The method is easy to use and can achieve the accurate measurement of the conductor temperature without damaging the cable body.

Finite Element Analysis on Ultimate Bearing Capacity of Diagonally Stiffened Steel Plates with Different Span-Depth Ratio

2014 ◽  
Vol 998-999 ◽  
pp. 530-533
Author(s):  
Yi Yin ◽  
Tao Tao Zhang ◽  
Xiao Dan Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Steel Plates ◽  
Distribution Law ◽  
Element Analysis ◽  
Depth Ratio ◽  
The Finite Element Analysis ◽  
Stiffened Steel

The ultimate bearing capacity of diagonally stiffened steel plates with different Span-depth ratio were analyzed by the finite element analysis software ANSYS. During the analysis, three groups of diagonally stiffened steel plates with different Span-depth ratio has been taken numerical investigations on static load, and obtained the stress distribution law of development and contrast characteristics of bearing capacity. Analysis shows components' yield and ultimate loads will be significantly improved with the decrease of Span-depth ratio. That means plates with small Span-depth ratio have better mechanical properties.

scholarly journals Experimental Study of an Inflatable Recyclable Anchor

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Taoli Xiao ◽  
Yunlong He
Keyword(s):  
Bearing Capacity ◽  
Embedment Depth ◽  
The Novel ◽  
Low Carbon ◽  
Pullout Capacity ◽  
Force Transmission ◽  
Inflation Pressure ◽  
Foundation Pit ◽  
Anchor System ◽  
Repeated Use

This paper describes an investigation into the performance and pullout capacity of a new inflatable anchor system embedded in deep excavation engineering. The proposed inflatable recyclable anchor system consists of a rubber pneumatic bag, movable steel plate, and force transmission bar, which can all be recycled after use. By conducting a number of field pullout tests, it is found that the pullout bearing capacity of the proposed anchor is related to the inflation pressure, the length of the rubber pneumatic bag, and the embedment depth. It is found that, with the exponential increase of inflation pressure or length of the rubber pneumatic bag, the pullout bearing capacity of the novel inflatable anchor increases exponentially. The proposed inflatable recyclable anchor can meet the bearing requirements of traditional grouted anchors. Moreover, the proposed anchor not only has better supporting effects than traditional grouted ones, but it also has the advantages of recyclability, repeated use, and rapid formation of anchorage force. It is a new green and low-carbon anchorage, so it will have good application prospects in temporary foundation pit slope engineering.

Modeling and experimental verification on directivity of an electret cell array loudspeaker

2012 ◽  
Vol 24 (3) ◽  
pp. 326-333 ◽  
Author(s):  
Yu-Chi Chen ◽  
Wen-Ching Ko ◽  
Han-Lung Chen ◽  
Hsu-Ching Liao ◽  
Wen-Jong Wu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Digital Control System ◽  
Analysis Model ◽  
Cell Array ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
The Finite Element Analysis ◽  
Directivity Characteristics

We propose a model to give us a method to investigate the characteristic three-dimensional directivity in an arbitrarily configured flexible electret-based loudspeaker. In recent years, novel electret loudspeakers have attracted much interest due to their being lightweight, paper thin, and possessing excellent mid- to high-frequency responses. Increasing or decreasing the directivity of an electret loudspeaker makes it excellent for adoption to many applications, especially for directing sound to a particular area or specific audio location. Herein, we detail a novel electret loudspeaker that possesses various directivities and is based on various structures of spacers instead of having to use multichannel amplifiers and a complicated digital control system. In order to study the directivity of an electret loudspeaker based on an array structure which can be adopted for various applications, the horizontal and vertical polar directivity characteristics as a function of frequency were simulated by a finite-element analysis model. To validate the finite-element analysis model, the beam pattern of the electret loudspeaker was measured in an anechoic room. Both the simulated and experimental results are detailed in this article to validate the various assertions related to the directivity of electret cell-based smart speakers.

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