The Influence of Climate Factors on the Stability of the Civil Engineering Constructions: Case of Forest Ecosystem in Southern Cameroon

2021 ◽  
pp. 139-146
Author(s):  
Samba Assomo Philippe ◽  
Zo'o Zame Philemon
Keyword(s):  
Forest Ecosystem ◽  
Civil Engineering ◽  
Climate Factors ◽  
Southern Cameroon ◽  
The Stability

ASSESSMENT OF PINE CROPS GROWTH IN BAIMAK FORESTRY

2020 ◽  
Vol 37 (3) ◽  
pp. 83-90
Author(s):  
T.Z. Mutallapov ◽  
Keyword(s):  
Scots Pine ◽  
Forest Ecosystem ◽  
Distribution Curve ◽  
Comparative Assessment ◽  
Tree Distribution ◽  
Entire Structure ◽  
Structure Changes ◽  
Large Trees ◽  
Different Types ◽  
The Stability

The article presents the results of evaluating the growth of Scots pine in the Baymak forest area. The analysis of forestry and taxation indicators of Scots pine crops on the studied sample areas is carried out, and a comparative assessment of the growth of forest crops growing in different types of forest is given. Increased competition in plantings leads to the natural decline of stunted trees, which is the result of differentiation in the stand. As a result, its structure changes, the number of large trees increases, and, accordingly, the stability of the forest ecosystem increases. In this regard, the appearance of the tree distribution curve by thickness levels also changes. It becomes more "flat", and its competitive load is more evenly distributed over the entire structure of the stand, and competition is weakened.

scholarly journals Problems of Logical-mathematical Modeling in the Course of Cribwork Quay Design: Innovative Methods of Civil Engineering

2018 ◽  
Vol 170 ◽  
pp. 03013
Author(s):  
Igor Pryadko
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Logic ◽  
Hydraulic Engineer ◽  
Civil Engineering ◽  
Port Management ◽  
Innovative Methods ◽  
Industrial Buildings ◽  
The Stability ◽  
Port Structures

In the article, the author analyzes the innovative methods, employed by the Russian hydraulic engineer Nikolai Mikhailovich Gersevanov in the course of the stability analysisperformed in respect of cribwork quays. The author addresses one of the little known works, written by this Russian architect of industrial buildings. The work in question covers the application of logic algebra formulas to the substantiation of the stability of foundations of quays and port structures; it is entitled “The Application of Mathematical Logic to the Analysis of Structures”. N.M. Gersevanov employs his method of logical-mathematical substantiation of stability of cribwork quays as an example in the second part of his research. The author also analyzes the features of construction of crib piers, the forces that they are exposed to, and any possible reasons for the destruction of cribwork quays. In this article, the problem of design of cribwork quays is tied to the problem of construction performed in the context of natural (hydrologic and tectonic) calamities, such as earthquakes, tsunamis, floods, and landslides. City and port management amid natural calamities represents an innovative challenge to be met by contemporary architects. The analysis of conditional propositions, employed in the work, written by N.M. Gersevanov, has proven his paper's novelty. The author of this article believes that antecedent and consequent are connected by the symbol of relevant (or nomological) implicationin hispropositions.

Experimental and Numerical Analysis of Concrete Slender Columns by Stability Failure

2016 ◽  
Vol 821 ◽  
pp. 747-752 ◽  
Author(s):  
Vladimír Benko ◽  
Ľudovít Fillo ◽  
Peter Kendický ◽  
Veronika Knapcová
Keyword(s):  
Civil Engineering ◽  
Design Method ◽  
Concrete Strength ◽  
Bending Moment ◽  
Concrete Columns ◽  
European Standard ◽  
Compression Strain ◽  
Significant Deficit ◽  
The Stability ◽  
Slender Columns

The European Standard [1] for design of concrete compressed slender members shows a significant deficit in global reliability for the design method based on non-linear analysis. The experimental investigation at the Faculty of Civil Engineering SUT in Bratislava was planned for slender concrete columns made of different concrete strength classes - C45/55, C70/85 and C100/115. A basic aim of the analysis was to design concrete columns subjected to bending moment and axial force where the stability failure proceeds at the compression strain 1.5 ‰. The first of three series of experimental and numerical analyzed columns is presented in the paper. The experiments were realized at the Faculty of Civil Engineering SUT in Bratislava with cooperation of ZIPP Bratislava LTD Company.

Monitoring of the stability of boreal forest ecosystem in northeast China in relation to natural disturbance in Landsat TM imagery

2001 ◽  
Author(s):  
Qi-Jing Liu ◽  
Akihiko Kondoh ◽  
Ryutaro Tateishi ◽  
Tamio Takamura ◽  
Nobuo Takeuchi
Keyword(s):  
Boreal Forest ◽  
Forest Ecosystem ◽  
Northeast China ◽  
Natural Disturbance ◽  
Landsat Tm ◽  
The Stability ◽  
Landsat Tm Imagery

Calculation and Application of Instability Critical Load on Cuplock Scaffold

2011 ◽  
Vol 99-100 ◽  
pp. 238-242
Author(s):  
Qing Cun Chen
Keyword(s):  
Critical Load ◽  
Calculation Method ◽  
Traditional Method ◽  
Civil Engineering ◽  
Scaffold Design ◽  
Elastic Supports ◽  
The Stability ◽  
The Impact

For the stability of scaffold commonly used in civil engineering, the continuous compressing bar calculation method with multi elastic supports and multi nodes is adopted with the weight of the bar considered based on a variety of traditional method. It is applied in the scaffold design and calculations of Yuping Yihe Bridge of Shandong Linyi. The calculating results show that, in general, the impact of the weight of the scaffold itself on the critical load can be ignored. But when the scaffold weight is large, the critical load has decreasing decent. The scaffold design proposed based on this method proved reasonable and reliable and ensured the smooth progress of the construction.

scholarly journals Relationships among Radial Growth of Cryptomeria japonica, Carbon Budget of a Forest Ecosystem, and Climate Factors in a Cool Temperate Zone

2021 ◽  
Vol 67 (3) ◽  
pp. 117-128
Author(s):  
Yu Hirano ◽  
Taku M. Saitoh ◽  
Eitaro Fukatsu ◽  
Hajime Kobayashi ◽  
Hiroyuki Muraoka ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Cryptomeria Japonica ◽  
Radial Growth ◽  
Carbon Budget ◽  
Temperate Zone ◽  
Climate Factors ◽  
Cool Temperate

scholarly journals Application of the Bipotential Theory to a Nonassociated Drucker–Prager Model

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Yang-Jing Zhou ◽  
Zhi-Qiang Feng ◽  
Juan Antonio Rojas Quintero ◽  
Jian-Bo Zhou ◽  
Hui-Jian Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Civil Engineering ◽  
The Finite Element Method ◽  
Rate Form ◽  
Plastic Stage ◽  
The Stability ◽  
Incremental Form ◽  
Elastic Stage ◽  
Numerical Strategy

The bipotential theory allows us to describe nonassociated material laws. In this paper, we propose its application to the Drucker–Prager model. With a new description of the implicit flow rules, we propose dual constitutive cones as well as five forms of the bipotential function: the elastic stage in rate form, the plastic stage in rate form, the elastic stage in incremental form, the plastic stage in incremental form, and the elastoplastic stage in incremental form. By combining these with the finite element method, a numerical strategy that deals with the nonassociated Drucker–Prager model is obtained. Two examples are simulated to verify the accuracy, the stability, and the practicability of the algorithm in civil engineering.

Open discussion

1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti
Keyword(s):  
Buenos Aires ◽  
Large Mass ◽  
List Type ◽  
Common Phenomenon ◽  
Open Discussion ◽  
The Stability ◽  
Ring Nebulae

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.

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