Seismic Behavior of Steel Column Base with Slip-Friction Connections

Traditional rigid column base connections are damaged to different degrees after an earthquake and the damage is generally nonrecoverable. Thus, the cost of repairing or dismantling is quite high. A new type of slip-friction column base connection is proposed in this paper, which aims to replace the yielding energy dissipation of the traditional column base connection by the sliding friction energy dissipation between the arc endplates, thus achieving the design objective of damage-free energy dissipation. Finite element simulation was conducted to study the hysteretic performance of the proposed connections considering different axial compression ratios. The research indicates that both kinds of the proposed connections show good energy dissipation behavior and the increase of axial compression force can increase the energy dissipation ability. It also shows that the two kinds of connections can achieve the objective of damage-free energy dissipation. For the proposed connection, future research is still needed such as corresponding tests in the laboratory, the effect of the connection on the whole structure, and the re-centering systems for the connections.

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Column base connections subjected to axial compression and biaxial moments

Advances in Engineering Materials, Structures and Systems: Innovations, Mechanics and Applications ◽

10.1201/9780429426506-210 ◽

2019 ◽

pp. 1213-1218

Author(s):

R. Cloete ◽

C. Roth

Keyword(s):

Axial Compression ◽

Base Connections ◽

Column Base

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Hysteretic Performance Analysis of Double-Tube Buckling Restrained Braces with Contact-Ring

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.681 ◽

2010 ◽

Vol 163-167 ◽

pp. 681-685 ◽

Cited By ~ 2

Author(s):

Zhan Zhong Yin ◽

Xiu Li Wang

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Energy Dissipation ◽

The Finite Element Method ◽

Restoring Force ◽

Buckling Restrained Brace ◽

Hysteretic Performance ◽

Buckling Restrained Braces ◽

Good Energy ◽

Force Characteristics

Double-tube buckling restrained braces with contact ring is a new buckling-restrained brace (BRBs), and is a refinement of double-tube buckling restrained braces. Based on the theory of the finite element method, the finite element entity model of double-tube buckling restrained brace with contact-ring has been made. The double-tube buckling restrained braces is systematically analyzed and computed. The analysis results indicate that this kind of buckling restrained brace has good energy dissipation and restoring force characteristics, and can overcome the difficulty in connection.

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Energy Dissipation Potential of Square Tubular Steel Columns Subjected to Axial Compression

International Journal on Engineering Applications (IREA) ◽

10.15866/irea.v7i1.17188 ◽

2019 ◽

Vol 7 (1) ◽

pp. 27

Author(s):

Robert M. Korol ◽

K. S. Sivakumaran

Keyword(s):

Energy Dissipation ◽

Axial Compression ◽

Dissipation Potential ◽

Steel Columns

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Attraction of prey

10.1093/oso/9780198779841.003.0012 ◽

2018 ◽

Cited By ~ 2

Author(s):

John D. Horner ◽

Bartosz J. Płachno ◽

Ulrike Bauer ◽

Bruno Di Giusto

Keyword(s):

Visual Cues ◽

Synergistic Action ◽

Carnivorous Plants ◽

Future Research ◽

Acoustic Cues ◽

Qualitative And Quantitative Analysis ◽

Qualitative And Quantitative ◽

The Past ◽

The Cost ◽

Prey Attraction

The ability to attract prey has long been considered a universal trait of carnivorous plants. We review studies from the past 25 years that have investigated the mechanisms by which carnivorous plants attract prey to their traps. Potential attractants include nectar, visual, olfactory, and acoustic cues. Each of these has been well documented to be effective in various species, but prey attraction is not ubiquitous among carnivorous plants. Directions for future research, especially in native habitats in the field, include: the qualitative and quantitative analysis of visual cues, volatiles, and nectar; temporal changes in attractants; synergistic action of combinations of attractants; the cost of attractants; and responses to putative attractants in electroantennograms and insect behavioral tests.

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Monitoring the technological processes in the wood industry in order to make them more efficient through technical overhauling

MATEC Web of Conferences ◽

10.1051/matecconf/201929002007 ◽

2019 ◽

Vol 290 ◽

pp. 02007

Author(s):

Radu Dan Paltan ◽

Cristina Biriş ◽

Loredana Anne-Marie Rădulescu

Keyword(s):

Automotive Industry ◽

Operating Mode ◽

Solid Wood ◽

Production Costs ◽

Operating Costs ◽

Future Research ◽

Wood Industry ◽

Research Article ◽

State Of Research ◽

The Cost

Of many techniques that are used to optimize production and costs, the studies conducted within a profile company lead to our choice for testing the 6Sigma method (the most used method in the automotive industry) in view of the economic efficiency applied in the wood Industry company. This method measures how many flaws exist in a process and determines in a systematic way how to improve it by technical overhauling and eliminating or minimizing the process for efficiency. This research article aims to study the state of research on the optimization of the production process through technical overhauling for panels reconstituted from solid wood and ways to make production more efficient by cutting costs through technical overhauling. From preliminary research, we estimate that all the items founded and others that will result from further research will result in a significant decrease in production costs that are reflected in the cost of the finished product and consequently in increasing the yield of the company by maximizing its profit. At the same time it may be the basis of future research studies in the field. The easier it is to maximize profits, the lower the operating costs are and the higher recovery rate of investments are, that will result a change in the operating mode: “working smarter not harder”.

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An explanatory study of the use of e-mail investor communication by South African listed companies

SA Journal of Information Management ◽

10.4102/sajim.v18i1.743 ◽

2016 ◽

Vol 18 (1) ◽

Author(s):

Roelof Baard ◽

George Nel

Keyword(s):

Listed Companies ◽

Future Research ◽

Contact Method ◽

Interactive Communication ◽

Handling Performance ◽

Corporate Websites ◽

Use Of Social Media ◽

Almost All ◽

The Cost ◽

E Mail

Background: Although research shows that almost all listed companies have corporate websites with dedicated investor relations (IR) sections that enable companies to ‘push’ information to investors, it was argued that such an asymmetrical approach to communication is insufficient for companies wishing to exercise good IR. The purpose of this study was to test the effectiveness of the Internet to act as a mechanism to achieve more interactive communication between companies and investors.Objectives: The objectives of the study were to measure the responsiveness, timeliness and relevance of companies’ responses to e-mail requests, and to test for the determinants (size, market-to-book ratio, profitability, leverage and liquidity) thereof.Method: The mystery investor approach and a content analysis were used to study the e-mail handling performance of companies. The associations between company-specific characteristics were statistically tested.Results: It was found that the e-mail handling performance of companies in this study was poor compared with previous studies. Significant relationships between company size and responsiveness and relevance, and between market-to-book ratio and relevance were reported, as well as between the contact method used to request information and relevance and the use of social media and timeliness.Conclusion: Specific areas where companies could improve their investor communications were identified. The need for further research was discussed to explain some of the relationships found, as well as those not found, in contrast to what was expected. Future research is warranted to examine the relationship between the e-mail handling performance of companies and information asymmetry and the cost of equity of companies.

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