Buildings and civil engineering works. Sealants. Determination of curing behaviour

2015 ◽  
Keyword(s):  
Civil Engineering

scholarly journals Measuring Displacements in Engineering Structures by Means of a Coordinate Laser Station

2016 ◽  
Vol 23 (4) ◽  
pp. 145-160 ◽  
Author(s):  
Jacek Sztubecki ◽  
Adam Bujarkiewicz ◽  
Małgorzata Sztubecka
Keyword(s):  
Measurement Technique ◽  
Civil Engineering ◽  
Direct Drive ◽  
Engineering Structures ◽  
Total Station ◽  
3 Dimensional ◽  
Dimensional Measurements ◽  
Civil Engineering Structures ◽  
Definition Of

Abstract The application of geodetic methods to examine structures consists in the determination of their displacements relative to an established geodetic reference datum or in the definition of the geometry of their individual components. Such examinations form a picture of changes happening between specific points in time. Modern measurement technologies used in geodetic engineering enable undertaking more and more challenging measurements with increasing accuracy. The purpose of this article is to present a measurement technique involving a Leica TDRA 6000 total station to measure displacements in engineering structures. The station features a direct drive technology to achieve an accuracy of 0.25 mm in 3-dimensional measurements. Supported by appropriate software, the unit makes a perfect instrument for the monitoring of civil engineering structures. The article presents the results of measurement of static and dynamic displacements in a few engineering structures. The measurements were carried out both in laboratory conditions and on actual, operated civil engineering structures.

The Assessment of Reaction to Fire of Crushed Straw

2016 ◽  
Vol 824 ◽  
pp. 148-155 ◽  
Author(s):  
Jiří Teslík ◽  
Martina Vodičková ◽  
Kristýna Kutilová
Keyword(s):  
Building Materials ◽  
Civil Engineering ◽  
Engineering Industry ◽  
Sound Insulation ◽  
Technical Parameters ◽  
Fire Characteristics ◽  
Full Utilization ◽  
Preliminary Classification

To full utilization of crushed straw in civil engineering industry is necessary to know its technical parameters. During previous projects on VŠB – TUO, Faculty of Civil Engineering have found parameters like settlement, thermal conductivity or airborne sound insulation. The research on these parameters have had favorable results, therefore the research is going on and other characteristics of crushed straw are finding out. These days the research team deals with determination of important fire characteristics of crushed straw. Fire characteristics play substantial character by building materials and their design in buildings. Nature materials are generally regarded as flammable. If some material is pressed, the same rule as in the phonebook – if you ignite one sheet of paper, it burns. But if you try to ignite the whole phonebook, it will be not so easy. This article is reported the first step of research on the reaction to fire. This is the preliminary classification of crushed straw into reaction to fire. The test was made according to methods which are described below. There are some changes in methods due to different structures of crushed straw.

scholarly journals Penerapan Metode Fuzzy Sugeno Pada Sistem Pendukung Keputusan Penentuan Konsentrasi Mahasiswa Jurusan Teknik Sipil

2017 ◽  
Vol 9 (2) ◽  
Author(s):  
Dwi Rosa Indah ◽  
Rizka Dhini ◽  
Vinna Alvionita
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Support System ◽  
Civil Engineering ◽  
Department Of State ◽  
Engineering Department ◽  
Computer Based ◽  
Output Stages

AbstrakPenelitian ini menekankan pada penerapan Metode Fuzzy Sugeno dalam Sistem Pendukung Keputusan Penentuan Konsentrasi Mahasiswa Jurusan Teknik Sipil pada tempat studi kasus Jurusan Teknik Sipil Politeknik Negeri Sriwijaya. Penerapan metode fuzzy sugeno dilakukan dengan tahap pendefinisian input dan output, pembentukan himpunan fuzzy dan penyelesaian dengan metode fuzzy sugeno. Hasilnya adalah metode fuzzy sugeno dapat membantu mengatasi masalah Penentuan Konsentrasi Mahasiswa Jurusan Teknik Sipil di tempat studi kasus. Selain itu Sistem Pendukung Keputusan Berbasis Komputer untuk Penentuan Konsentrasi Mahasiswa Jurusan Teknik Sipil menggunakan Fuzzy Sugeno menghasilkan persentase kelayakan masing-masing konsentrasi jurusan teknik sipil dan memberikan rekomendasi konsentrasi yang paling layak bagi mahasiswa.Kata kunci: Sistem Pendukung Keputusan, Fuzzy SugenoAbstractThis research emphasizes on the application of Fuzzy Sugeno method in Decision Support System for Determining Concentration of Students Civil Engineering at Case Study of Civil Engineering Department of State Polytechnic of Sriwijaya. The fuzzy sugeno method is done by defining input and output stages, fuzzy set formation and completion using fuzzy sugeno method. The result is fuzzy sugeno method can solve problem in Determining Concentration of Students Civil Engineering at Case Study. In addition, Computer Based Decision Support System for Determination of Civil Engineering Student Concentration using Fuzzy Sugeno resulted in the percentage of eligibility of each concentration of civil engineering department and give the most appropriate concentration recommendation for the students.Keywords: Decision Support System, Fuzzy Sugeno

scholarly journals Estimation at Completion in Civil Engineering Projects: Review of Regression and Soft Computing Models

2021 ◽  
Vol 2 (2) ◽  
pp. 1-12
Author(s):  
Almahdi Mohamed Araba ◽  
Zubair Ahmed Memon ◽  
Musab Alhawat ◽  
Mumtaz Ali ◽  
Abdalrhman Milad
Keyword(s):  
Soft Computing ◽  
Construction Projects ◽  
Civil Engineering ◽  
Project Managers ◽  
Current Status ◽  
Engineering Project ◽  
Critical Problems ◽  
Future Direction ◽  
Engineering Projects

Construction projects are usually associated with several challenges owing to the varying process during the project lifetime. Hence, the final cost of any civil engineering project is influenced by many factors. There are numerous ways of determining the final cost of a project, however, the most essential approach is the Estimate at Completion (EAC) technique. This technique is mostly favored because it considers the probability of risks and project performance. Furthermore, EAC helps project managers in the definition and determination of the critical problems expected during the project period and the likely solutions toward these problems. In this review research, the basic empirical, regression and advanced soft computing methodologies adopted for the EAC computation, were surveyed and reported in detail. The review established on the base to recognize the modern advancement of the soft computing in computing the EAC with accurate, reliable and robust manner. The review was highlighted the main literature limitation, current status and possible future direction.

Considerations of the transverse vibration of a mechanical system with two identical bars

2017 ◽  
Vol 233 (7) ◽  
pp. 1318-1323 ◽  
Author(s):  
Sorin Vlase ◽  
Marin Marin ◽  
Andreas Öchsner
Keyword(s):  
Mechanical Properties ◽  
Mechanical System ◽  
Design Process ◽  
Transverse Vibration ◽  
Civil Engineering ◽  
Mechanical Systems ◽  
Computation Time ◽  
Engineering Applications ◽  
Transverse Vibrations

In this paper, mechanical properties of the mechanical systems that have certain symmetries are determined. Similar problems occur frequently in engineering applications and civil engineering where many mechanical systems used in these areas exhibit symmetrical properties resulting from the design process, fabrication reasons, simplicity, cost, or logistics. The paper aims to determine the properties of the eigenvalues and the eigenmodes of transverse vibrations in a mechanical system with beams where two of the three beams were identical. The determination of these properties allows us to reduce the calculus effort and the computation time and, in addition, increases the accuracy of the results.

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