Calculating Size Limitations of Non-Load-Bearing Walls under Seismic Loads

2012 ◽  
Vol 204-208 ◽  
pp. 2646-2652
Author(s):  
Chun Xia Yang ◽  
Qing Qing Liu ◽  
Li Juan Sun ◽  
Jian Guo Liang
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Thickness Ratio ◽  
Seismic Loads ◽  
Infill Walls ◽  
Load Bearing ◽  
Design Specifications ◽  
Out Of Plane

Infill walls,etc. non-load-bearing walls are vulnerable to fracture when these are subjected to out-of-plane seismic loads. Studies suggest that the overall dimensions of non-load-bearing walls are the important parameters to affect its out-of-plane mechanical properties, but most of these researches are qualitative researches, do not give specific size limitations. This paper based on codes has calculated out-of-plane loads of non-load-bearing walls, then bearing capacity check formulas have been deduced when non-load-bearing walls are subjected to out-of-plane seismic loads, finally the size limitations used in the height-thickness ratio check and seismic check are obtained.The conclusions fill up gaps in research of non-load-bearing walls ,and provide reference for the design specifications of non-load-bearing walls.

scholarly journals Test on axial compression performance of nano-silica concrete-filled angle steel reinforced GFRP tubular column

2019 ◽  
Vol 8 (1) ◽  
pp. 523-538 ◽  
Author(s):  
Kang He ◽  
Yu Chen ◽  
Wentao Xie
Keyword(s):  
Compressive Strength ◽  
Bearing Capacity ◽  
Thickness Ratio ◽  
Nano Silica ◽  
Concrete Compressive Strength ◽  
Initial Stiffness ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Angle Section ◽  
Angle Steel

AbstractThis paper attempts to investigate the effect of various parameters on the axial compressive behavior of nano-silica concrete-filled angle steel reinforced GFRP tubular columns. The proposed new composite column consists of three parts: the outer GFRP tube, the inner angle section steel and the nano-silica concrete filled between GFRP tube and angle section steel. Twenty-seven specimens with different nano-silica concrete compressive strength (20MPa, 30MPa and 40MPa), diameter-to-thickness ratio of GFRP tube (20, 25 and 40) and steel ratio (0.008, 0.022 and 0.034) were tested under axial load. The main purpose of this study is to examine the effect of the three parameters on the following: failure modes, deformation capacity, load bearing capacity, ductility and initial stiffness of the new composite column under axial load. It was found that the load bearing capacity and initial stiffness increased as the nano-silica concrete compressive strength of the specimens increased. But the specimens with higher nano-silica concrete compressive strength showed lower deformation capacity than that of the specimens with lower nano-silica concrete compressive strength. The varieties of the steel ratio have no significant effect on the specimens’ axial deformation behavior. Experimental results also showed that both load bearing capacity and deformation capacity increased with the decrease of diameter-to-thickness ratio of GFRP tube. However, diameter-to-thickness ratio of GFRP tube has no significant effect on the initial stiffness of specimens. The confinement coefficient was proposed to better evaluate the confinement effect of GFRP tube on the inner angle section steel reinforced core nano-silica concrete. The confinement effect of GFRP tube on lower strength concrete was better, and the confinement effect reduced as the diameter-to-thickness ratio of GFRP tube increased. The design formulas for the load bearing capacity of the nano-silica concrete-filled angle steel reinforced GFRP tubular columns under axial load were proposed.

Experiment of the SCT Joint under Complicated Loading

2011 ◽  
Vol 255-260 ◽  
pp. 607-613
Author(s):  
Bing Liao ◽  
Yong Feng Luo ◽  
Xiao Nong Guo
Keyword(s):  
Bearing Capacity ◽  
Loading Condition ◽  
Steel Structure ◽  
Force Transmission ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Roof Structure ◽  
Axial Forces ◽  
Out Of Plane ◽  
Water Sports

A radial-circle-lined grid shell, its height changed step by step in the radial direction, is adopted in the roof steel structure of the Citizen Water Sports Center in Jiangyin, China. And the Spatial Crossing Tubular (SCT) joint is used for the connection of pipe members. Because the force transmission in the roof structure is different from the traditional truss structure, a lot of SCT joints are in a complicated loading state. The joint forces include axial forces and in/out-of-plane moments. To investigate the mechanical behavior and the load-bearing capacity of a typical SCT joint in such complicated loading condition, a full size model test of the typical SCT joint is conducted. The test process is summarized in the paper, together with the finite element calculation of the typical SCT joint in test conditions. By comparing the numerical results with the test results, several significant parameters of the connection are investigated, including the stiffness change of the joint, the transmission mechanism of forces, the ultimate load-bearing capacity and the failure mode of the joint. After investigation, several useful suggestions are proposed for the SCT joint design. They are also valuable for the design of similar SCT joints under complicated loading condition.

FINITE ELEMENT ANALYSES ON CORRODED PONY TRUSS BRIDGE FOR REASONABLE MAINTENANCE

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Risa Fujinaga ◽  
Tatsumasa Kaita ◽  
Ryoko Koyama ◽  
Tsutomu Imai ◽  
Katashi Fujii
Keyword(s):  
Bearing Capacity ◽  
Ultimate Load ◽  
Plane Deformation ◽  
Element Model ◽  
Truss Structures ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Out Of Plane ◽  
Pony Truss Bridge ◽  
Truss Bridge

The load bearing capacity of an existing corroded pony truss bridge, which is used for 100 years was estimated from FEM results for whole bridge model. The beam element model is to clarify that the influence of the residual out-of-plane deformation in main truss structures on the load bearing capacity from the viewpoint of whole bridge. Also, shell element model is to clarify that the influence of severe corrosion damages occurred in many structural members on the load bearing capacity as whole bridge. On the other hand, the influence of assumed support conditions in analytical models were discussed from the analytical results of both type of models, because it will be thought that the performance of shoes deteriorates gradually by long in-service period. The ultimate load bearing capacity was estimated by the critical live load magnification. From the analytical results, the residual out-of-plane deformation of main truss structures in this bridge had little influence on the ultimate load bearing capacity. Also, the ultimate load bearing capacity may decrease up to 20% due to aging deterioration of shoes including corrosion damages. In bridge maintenance, it should be paid attention on local severe corrosion damages on the structural member, which may occur higher secondary stress.

scholarly journals Mechanical Properties of Strengthened RC Beams using Steel Plates

2020 ◽  
Vol 9 (4) ◽  
pp. 1208-1217
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Steel Plate ◽  
Fem Analysis ◽  
Steel Plates ◽  
Rc Beam ◽  
Rc Beams ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Single Row

The focus of this analysis is the review of steel plate strengthened RC beams using Single row and Stagger row bolt arrangements and to compare the bonding behaviour of different bolts arrangement under flexure. Also, to investigate the behaviour, load bearing capacity and the deflection for control and steel plate bonded beams. This research is constrained by FEM analysis utilizing ANSYS to the actions of standard RC Beam and RC beam steel plate associated.

scholarly journals Investigation of the out-of-plane load-bearing capacity of T1100/5405 composite T-stiffened panels

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Heyuan Huang ◽  
Xuanjia Zhang ◽  
Zhicheng Dong ◽  
Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Damage Evolution ◽  
Shear Loading ◽  
Zone Model ◽  
Lateral Bending ◽  
Load Bearing Capacity ◽  
Evolution Law ◽  
Load Bearing ◽  
Stiffened Panels

AbstractWith the continuous improvement of the mechanical properties of composite materials, the adhesive interface performance of composite T-stiffened panels has become a critical factor in determining the overall structural strength. However, little work has been reported on the mechanical properties of adhesive interfaces in composite T-stiffened panels under lateral bending and shear loading. Especially, there is no clear explanation on the damage evolution law of structural properties for the interface with defects, which greatly influenced the use of T-stiffened composite structures. In this paper, the mechanical properties of T1100/5405 composite T-stiffened laminates under lateral bending and shear loading are experimentally and numerically investigated. The load-bearing capacities for the panels with intact and defected adhesive interfaces are compared, the damage evolution law of typical T-stiffened structures is further explored. Based on the continuum damage model (CDM) and the cohesive zone model (CZM), the constitutive models of the adhesive layer and the composite material are established respectively. Good agreements between experimental and numerical profiles illustrate that damages mainly occur on the loading side and the corner of the L-type ribs under lateral bending conditions, while damages extend from both sides of the interface layer to the center under shear loading. When a prefabricated defect exists, damages extend from the defect location along the loading direction. At the same time, the analysis shows that the lay-up of the surface layer, the chamfer radius, and the width of T-type ribs have a great influence on the structural load-bearing capacity, but less on the damage evolution form.

scholarly journals RSW Junctions of Advanced Automotive Sheet Steel by Using Different Electrode Pressures

2018 ◽  
Vol 8 (5) ◽  
pp. 3492-3495
Author(s):  
A. Alzahougi ◽  
M. Elitas ◽  
B. Demir
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Sheet Steel ◽  
Shear Load ◽  
Tensile Shear ◽  
Load Bearing Capacity ◽  
Maximum Displacement ◽  
Load Bearing ◽  
Current Value ◽  
Welding Processes

Based on this study, the effects of the different types of welding currents and electrode pressures on the tensile shear properties of the resistance spot welding (RSW) which are the joints of the commercial DP600 sheet steel are now been investigated. In addition to the fact that the electrode pressure is not much of a popular piece or topic of discussion in the literature, the expression of the mechanical properties of these commercial materials (most importantly in the DP and in the high strength steels). These factors that are known to be affecting the strength of the material are dispute. In the tensile shear tests of this welded joints; the tensile shear force and the maximum displacement were utilized to characterize the performance of the welding processes. The nugget diameter has been measured to create a clear definition of the RSW physical properties. The experimental results show that the tensile shear load bearing capacity is bond to increase as the electrode pressure increases based on a value in both the welding currents and the decrease at the higher values. The low current value at low and at the highest electrode pressures; during the high current value which could be at the middle of the electrode pressure values it can exhibit the superior mechanical properties. The effect of this electrode pressure on the tensile shear load bearing capacity is bond to increase as the welding current increases as well. This, also been assessed and examined based on the low carbon content.

Static-Strain-Induced Adaptation of Fibrous Tissue

2009 ◽  
Author(s):  
Jasper Foolen ◽  
Corrinus C. van Donkelaar ◽  
Sarita Soekhradj-Soechit ◽  
Rik Huiskes ◽  
Keita Ito
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Structural Changes ◽  
Fibrous Tissue ◽  
Load Bearing Capacity ◽  
Mechanical Environment ◽  
Load Bearing ◽  
Static Strain ◽  
Environment Adaptation ◽  
Fibrous Tissues

Fibrous tissues have the ability to adapt to their mechanical environment. Adaptation can be guided by the direction and magnitude of the imposed load, leading to structural changes and altered mechanical properties. This is important for proper functioning of all fibrous tissues, especially those with a load bearing capacity such as tendons, ligaments, and tissue-supporting fibrous sheets. The mechanism by which fibrous tissues adapt to alterations in their mechanical environment remains unresolved, and such knowledge will be helpful to guide repair and engineering of artificial fibrous tissues.

Konstruktive Injektion von historischem Mauerwerk mit mineralisch- oder polymergebundenen Mörteln / Structural injection of historical masonry using mineral or polymer based grouts

1999 ◽  
Vol 5 (1) ◽  
pp. 73-98 ◽  
Author(s):  
D. Van Gemert ◽  
E.-E. Toumbakari ◽  
L. Schueremans
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Masonry Structures ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Recent Developments ◽  
Safety And Reliability ◽  
Historical Masonry ◽  
The Stability

Abstract Recent developments in injection grouts used for consolidation are proposed. Special compositious have been developed, made out of lime, cement and pozzolan. The stability, the viscosity and the mechanical properties are illustrated. Comparison is made with polymer grouts and with double injections using mineral and polymer grouts consequently. The influence of injections on the load-bearing capacity of the masonry is calculated. Some elements for the judgment of the safety and reliability of masonry structures are pointed out.

The assessment of the level of local strengthening of pipe steel welded connections

2020 ◽  
Vol 10 (3) ◽  
pp. 252-262
Author(s):  
Marat Z. Yamilev ◽  
◽  
Egor А. Tigulev ◽  
Andrey А. Raspopov ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Numerical Model ◽  
Bearing Capacity ◽  
Pipe Steel ◽  
Carbon Steels ◽  
Strengthening Effect ◽  
Low Carbon ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Welded Connection

The metal welding is accompanied by the formation of mechanically non-homogenous sections of welded connection. The pipeline welded connections also have sections, which are different in structure, chemical composition and mechanical properties. The mechanical inhomogeneity affects the load bearing capacity of welded connection and the structure as a whole, which is necessary to take into consideration when performing calculation analysis. So far, the specialists have established the dependencies in assessment of welded connection strength with various types of heterogeneous sections. However, this phenomenon has received little attention in case of pipeline welded connections made of low carbon steels. The existing theoretical models do not reflect actual anisotropy of mechanical properties of the welded connections and weld adjacent zone. The present study considers the model of welded connections of K56 pipe steels with various strength characteristics of sections of welded seam and weld adjacent zone, without defects. The assessment of mechanical inhomogeneity influence on load bearing capacity of welded connections was performed by applying the finite-element modelling of its stress-strain state. The developed numerical model helps to determine and optimize the criteria of testing of full scale samples of pipe steel welded connections with regards to the implementation of local strengthening effect. The research results demonstrated that the degree of contact strengthening in welded connections with X-shape grooving is higher than in welded connections with V-shaped grooving by 8 % at similar relative thickness of soft interlayer. The suggested numerical model can be applied for detailed calculations of pipelines with regards to the mechanical inhomogeneity of its welded connections.

scholarly journals LOAD BEARING CAPACITY OF THE GLASS RAILING ELEMENT

2016 ◽  
Vol 3 ◽  
pp. 65-70
Author(s):  
Elizabeta Šamec ◽  
Domagoj Damjanovic ◽  
Joško Krolo
Keyword(s):  
Mechanical Properties ◽  
Numerical Model ◽  
Structural Material ◽  
Bearing Capacity ◽  
Physical And Mechanical Properties ◽  
Laminated Glass ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Pedestrian Bridge ◽  
Numerical Testing

In this paper some basic physical and mechanical properties of glass as structural material are presented. This research is about specifically manufactured glass railing element that will be a part of a pedestrian bridge construction in Zagreb, Croatia. Load bearing capacity test of the glass railing element is conducted within the Faculty of Civil Engineering in Zagreb and obtained experimental results are discussed and compared to the ones provided by the numerical model. Taking into account the behaviour of laminated glass and results of experimental and numerical testing, glass railing element can be regarded as safe.

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