Stability Bearing Capacity Analysis for High-Strength Angle Steel Members with an Eccentric Load at One End

2011 ◽  
Vol 474-476 ◽  
pp. 739-743
Author(s):  
Xian Lei Cao ◽  
Ji Ping Hao
Keyword(s):  
Bearing Capacity ◽  
Analytical Method ◽  
High Strength ◽  
Eccentric Load ◽  
Stability Bearing Capacity ◽  
Experiment Method ◽  
Angle Steel ◽  
The Stability ◽  
End Restraint ◽  
The Impact

Single-angle compression members with an eccentric load at one end were widely used in transmission towers, analyzing the stability bearing capacity become a very complex issue due to end restraint conditions and the impact of defects. Experiment method and analytical method were used to study the size of the stability capacity on four kinds of members, analytical method use energy relationship, the boundary conditions issue is simplified according to different end restraint capacity, and finally discuss the theoretical ultimate bearing capacity of the test members. Compared with the experimental results show that the elastic theory analytical solution overestimates the capacity of members, using experiment method can obtain more secure mechanical behavior of high-strength angle steel member with an eccentric load at one end.

Research on Stability Bearing Capacity for Pole and Tower Compression Members with Two Legs Connection

2012 ◽  
Vol 214 ◽  
pp. 315-319
Author(s):  
Xian Lei Cao
Keyword(s):  
Numerical Simulation ◽  
Analytical Solution ◽  
Bearing Capacity ◽  
Analytical Method ◽  
High Strength ◽  
Simulation Method ◽  
Elastic Theory ◽  
Numerical Simulation Method ◽  
Stability Bearing Capacity ◽  
Compression Members

In order to research the stability bearing capacity of high strength pole and tower compression members, analytical method and numerical simulation method were used to study stability on high strength axial compression members. Researched the impact of different slenderness ratio, different cross-section factors on the bearing capacity; energy relationship was using in analytical method, the boundary conditions issue is simplified according to different end restraint capacity; the failure modes and stability bearing capacity of members were studied by numerical simulation. Compared with the experimental results show that the numerical simulation and elastic theory analytical solution overestimate the capacity of members, but the numerical results have better agreement than the elastic theory analytical solution, which can show the numerical simulation method is right. Experiment method can obtain more secure mechanical behavior of high-strength angle steel member with axial loading.

scholarly journals Analysis and Calculation of Stability Coefficients of Cross-Laminated Timber Axial Compression Member

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4267
Author(s):  
Qi Ye ◽  
Yingchun Gong ◽  
Haiqing Ren ◽  
Cheng Guan ◽  
Guofang Wu ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Axial Compression ◽  
Calculation Method ◽  
National Standards ◽  
Test Results ◽  
Average Deviation ◽  
Stability Coefficient ◽  
Cross Laminated Timber ◽  
Stability Bearing Capacity ◽  
The Stability

Cross-laminated timber (CLT) elements are becoming increasingly popular in multi-storey timber-based structures, which have long been built in many different countries. Various challenges are connected with constructions of this type. One such challenge is that of stabilizing the structure against vertical loads. However, the calculations of the stability bearing capacity of the CLT members in axial compression in the structural design remains unsolved in China. This study aims to determine the stability bearing capacity of the CLT members in axial compression and to propose the calculation method of the stability coefficient. First, the stability coefficient calculation theories in different national standards were analyzed, and then the stability bearing capacity of CLT elements with four slenderness ratios was investigated. Finally, based on the stability coefficient calculation formulae in the GB 50005-2017 standard and the regression method, the calculation method of the stability coefficient for CLT elements was proposed, and the values of the material parameters were determined. The result shows that the average deviation between fitting curve and calculated results of European and American standard is 5.43% and 3.73%, respectively, and the average deviation between the fitting curve and the actual test results was 8.15%. The stability coefficients calculation formulae could be used to predict the stability coefficients of CLT specimens with different slenderness ratios well.

Study on Capacity of High-Strength Angle Struts Connected by Single Limb

2012 ◽  
Vol 594-597 ◽  
pp. 987-992
Author(s):  
Chun Lei Fan ◽  
Ji Ping Hao ◽  
Wei Feng Tian
Keyword(s):  
Bearing Capacity ◽  
Slenderness Ratio ◽  
High Strength ◽  
Ultimate Bearing Capacity ◽  
Current Standard ◽  
Compression Members ◽  
Angle Steel ◽  
Ratio Of Components

Experiment on bearing capacity of 24 Q460 high strength angle steel for compression members attached by one leg shows: the ultimate bearing capacity of the experiment value are higher than the calculated of the “Design of Latticed Steel Transmission Structures” (ASCE10-1997), on the same section in different slenderness ratio of components, the larger slenderness ratio, the higher the ratio; while on the same slenderness ratio in different sections, the greater width-thickness radio, the greater the ratio. Based on this problem, analyzing the current standard, a set of formulas based on high-strength angle struts connected by single Limb was brought, which can used for the design of the Q460 high-strength angle.

scholarly journals Fire Performance of Columns Made of Normal and High Strength Concrete: A Comparative Analysis

2016 ◽  
Vol 711 ◽  
pp. 564-571 ◽  
Author(s):  
Thomas Gernay
Keyword(s):  
Bearing Capacity ◽  
High Strength Concrete ◽  
Concrete Strength ◽  
High Strength ◽  
Strength Loss ◽  
Fire Performance ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Strength Concrete ◽  
The Impact

The use of high strength concrete (HSC) in multi-story buildings has become increasingly popular. Selection of HSC over normal strength concrete (NSC) allows for reducing the dimensions of the columns sections. However, this reduction has consequences on the structural performance in case of fire, as smaller cross sections lead to faster temperature increase in the section core. Besides, HSC experiences higher rates of strength loss with temperature and a higher susceptibility to spalling than NSC. The fire performance of a column can thus be affected by selecting HSC over NSC. This research performs a comparison of the fire performance of HSC and NSC columns, based on numerical simulations by finite element method. The thermal and structural analyses of the columns are conducted with the software SAFIR®. The variation of concrete strength with temperature for the different concrete classes is adopted from Eurocode. Different configurations are compared, including columns with the same load bearing capacity and columns with the same cross section. The relative loss of load bearing capacity during the fire is found to be more pronounced for HSC columns than for NSC columns. The impact on fire resistance rating is discussed. These results suggest that consideration of fire loading limits the opportunities for use of HSC, especially when the objective is to reduce the dimensions of the columns sections.

Experimental Study on Bearing Capacity of Q690 High-Strength Steel Tubes under Axial Load

2014 ◽  
Vol 638-640 ◽  
pp. 101-104
Author(s):  
Yi Liang Peng ◽  
Guo Tian Li ◽  
Xuan Min Han ◽  
Lei Chen
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
High Strength Steel ◽  
Axial Load ◽  
High Strength ◽  
Steel Grade ◽  
Stability Factor ◽  
Steel Tubes ◽  
Steel Members ◽  
The Stability

With the rapid development of power transmission and transformation projects in China, steel supporting structure has already became the most popular structural form for these structures. However, the limit of steel grade used for current substation supporting structures is normally Q420, compared with that of Q690 used in other countries. When the high-strength steel is used, the geometric parameters of section for members become smaller, and the stability of members is the most important factors to influence the bearing capacity of structures. The stability factor for axial loaded steel members in current 《Code for design of steel structures》(GB50017-2003) was derived based on the experimental results for steel members with lower steel grade, the results are inevitably different from those for high-strength steel members. To make the calculations of Q690 high-strength steel tubes more accurate and reasonable, this paper conducts experimental study on the bearing capacity of Q690 high-strength steel tubes under axial load to provide scientific basis for practical design of these structures.

scholarly journals Parameter analysis of stability bearing capacity of bottom frame beam for container building

2019 ◽  
Vol 136 ◽  
pp. 04062
Author(s):  
Songfeng Sun ◽  
Penggang Guo ◽  
Qingyu Zhang ◽  
Baoguang Chen ◽  
Pingping Zhang
Keyword(s):  
Finite Element Method ◽  
Bearing Capacity ◽  
Parameter Analysis ◽  
Factors Affecting ◽  
Control Factors ◽  
Stability Bearing Capacity ◽  
Analysis Of Stability ◽  
The Stability ◽  
Bottom Frame ◽  
The Web

In this paper, the bottom frame beam of container building is analyzed by finite element method, and compared with the experimental results, the accuracy of the model is verified to meet the needs of the analysis. On this basis, by changing the stiffening position of the upper flange, the height of the web, the load layout and the thickness of the wall, the variation of the stability bearing capacity of the bottom frame beam was studied, the control factors affecting the stability bearing capacity of the bottom frame beam were obtained, and the selection suggestions were given.

Stability Bearing Capacity of Dendritic Arms in Tainter Gate

2015 ◽  
Vol 733 ◽  
pp. 464-467
Author(s):  
Yong Kang Shen ◽  
Zheng Zhong Wang ◽  
Chun Long Zhao
Keyword(s):  
Stability Analysis ◽  
Bearing Capacity ◽  
Effective Length ◽  
Analysis Method ◽  
Analysis Model ◽  
Minimum Potential Energy ◽  
Stability Bearing Capacity ◽  
Minimum Potential ◽  
The Stability ◽  
Radial Gate

The new arms form of radial gate—dendritic arms is introduced for the proper mechanical mechanism, however the stability design is very difficult. According to the stability theory of structure, the stability analysis model of step column with lateral restraints was proposed for dendritic arms, some equations was derived from the principle of minimum potential energy, the practical formulas of buckling bearing capacity and effective length coefficient were provided. According to an example, the accuracy on formulas was verified by finite analysis method.

Stability Analyses for Single Arch of Arch-Reticulated Shell Hybrid Steel Structure of Conservatories at Gardens by the Bay in Singapore

2011 ◽  
Vol 243-249 ◽  
pp. 832-837
Author(s):  
Yang Gao ◽  
Zhao Yi Zhang ◽  
Yong Jiu Shi ◽  
Yuan Qing Wang ◽  
Guo Xing Li
Keyword(s):  
Bearing Capacity ◽  
Local Stability ◽  
Full Range ◽  
Steel Structure ◽  
Load Bearing ◽  
Stability Analyses ◽  
Stability Bearing Capacity ◽  
Grid Shell ◽  
Stiffening Ribs ◽  
The Stability

Conservatories at gardens by the bay in Singapore consist of Cool Dry and Cool Moist, which are intended for the display of plants that typically thrive separately in cool dry and cool moist climates. The envelope itself consists of a grid shell-arch steel structure with a double glazed skin that sits directly on the grid shell, and the arches are the main load-bearing components. This paper analyzed the stability of one single arch whose span is the longest one in the corresponding structure, including buckling analyses and non-linear full range analyses. It also carried out stability analyses on some arch segments. The results showed that the stability bearing capacity of single arches met requirements, while some arch segments didn’t. After using the stiffening ribs, the local stability reached its requirements.

Mechanical Properties of the Section from Steel Tube-Reinforced Concrete Pier

2015 ◽  
Vol 744-746 ◽  
pp. 789-792
Author(s):  
Zhen Wang ◽  
Xiu Xin Wang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
High Strength ◽  
Steel Tube ◽  
Total Moment ◽  
Matlab Program ◽  
Curvature Ductility ◽  
The Moment ◽  
The Impact ◽  
Participation Factor

To research the impact of inner concrete filled steel tubular (CFST) on the reinforced concrete (RC) pier confined by stirrups, a Matlab program based on fiber model was written to calculate the moment-curvature (M-ϕ) relationship. The program was utilized to compute the M-ϕ relationships of three piers with same longitudinal bars and stirrups, and the three piers were an ordinary RC pier confined by stirrups、a high strength reinforced concrete (HSRC) pier confined by stirrups and a steel tube-reinforced concrete (ST-RC) pier respectively. The rules about bearing capacity of section and curvature ductility along with axial load N were deliberated by comparing the numeral results of three piers. The ratio of peak moment Mk to yield moment My was defined as super coefficient λs, and the disciplinarian of λs along with N was discussed. Participation factor ξ referred to the ratio of the moment provided by inner CFST to the total moment of ST-RC pier, and the laws of ξ affected by ϕ and N were researched. The results show that ST-RC pier has higher ductility and higher bearing capacity of section, and ductility decreases more slowly than other piers with the increase of N. λs of ST-RC pier is highest among three piers in most cases. On conditions of different N, ξ shows different variation trend with curvature ϕ up, and the maximum of participation factor ξmax is reckoned to be not affected by N basically.

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