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Title: Magazine of Civil Engineering № 6 (98)
Organization: Санкт-Петербургский политехнический университет Петра Великого
Imprint: Санкт-Петербург: СПбПУ, 2020
Collection: Общая коллекция
Subjects: Строительство; Сопротивление материалов; Строительная механика; Строительные материалы
UDC: 624.04(051); 69(051); 539.3/.6(051)
File type: PDF
Language: English
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Table of Contents

  • title98
  • реклама1
  • index
    • E-mail: mce@spbstu.ru
    • Web: http://www.engstroy.spbstu.ru
    • Contents
  • 01
    • Centrifugal modeling of underground polymer pipes under temperature effect
      • 1. Introduction
      • 2. Methods
        • 2.1. The methods to conduct experimental studies
        • 2.2. Experimental studies
      • 3. Results and Discussion
      • 4. Conclusion
  • 02
    • Mechanical-thermal characteristics of foamed ultra-lightweight composites
      • 1. Introduction
      • 2. Materials and Methods
        • 2.1. Materials
        • 2.2. Mixture proportions
        • 2.3. Mixing procedure and specimen preparation
        • 2.4. Test methods
        • 2.5. The temperature distribution in the wall by a finite element model
      • 3. Results and Discussion
        • 3.1. Compressive strength
        • 3.2. Microstructure
        • 3.3. Dry density and water absorption
        • 3.4. Thermal conductivity
        • 3.5. The behavior of FULC under fire condition
      • 4. Conclusions
      • 5. Acknowledgment
  • 03
    • 1. Introduction
    • 2. Methods
    • 3. Results and Discussion
  • 04
    • Mechanical activation in the production of lime-sand mixtures
      • 1. Introduction
      • 2. Research methods
      • 3. Results and Discussion
      • 4. Conclusions
      • 5. Acknowledgements
  • 05
    • Effect of multicomponent modifier on the properties of cement pastes formulated from self-compacting concrete
      • 1. Introduction
      • 2. Materials and Methods
        • 2.1. Materials
        • 2.2. Test Procedures
      • 3. Results and Discussion
        • 3.1. Rheological Properties of Cement Pastes
        • 3.2. Setting time and compressive strength of binders
        • 3.3. Properties of self-compacting concretes
      • 4. Conclusions
  • 06
    • Cement slurry from electro-phosphoric slag
      • 1. Introduction
      • 2. Methods
        • 2.1. Raw materials
        • 2.2. Research methods
        • 2.3. Samples preparation
      • 3. Results and Discussion
        • 3.1. Sludge of a mixture of limestone and granulated phosphoric slag
        • 3.2. Physical and mechanical properties of lime-slag sludge cement
      • 4. Conclusions
  • 07
    • Antiskid prediction model for cement pavements in seasonal frost regions
      • 1. Introduction
      • 2. Methods
        • 2.1. Screening of influencing factors for antiskid
        • 2.2. Identification of key factors
        • 2.3. Determination of model parameter value range
        • 2.4. Determination of the optimal prediction space of the model
      • 3. Results and Discussion
        • 3.1. Establishment of Model Relationship
        • 3.2. Significance test of regression equation
        • 3.3. Significance test of regression coefficient
        • 3.4. Model goodness of fit test
        • 3.5. Model normal distribution test
        • 3.6. Model verification
      • 4. Conclusions
      • 5. Acknowledgements
  • 09
    • Behavior of heat treated self-compacting mortar cured in seawater
      • 1. Introduction
      • 2. Materials and Methods
        • 2.1. Materials
        • 2.2. Methods
    • The characteristics of the heat-treated SCMs are compared to the characteristics of that of the control SCMs (without addition and/or standard treatment at 20 C).
      • 3. Results and Discussion
        • 3.1. Porosity
        • 3.2. Shrinkage and swelling
        • 3.3. Compressive strengths
      • 4. Conclusions
  • 10
    • The shear behavior of CFRP strengthened RC beams
      • 1. Introduction
      • 2. Methods
        • 2.1. Beam Description
        • 2.2. Description of Non-linear Finite Element Analysis (NLFEA)
        • 2.3. Validation Process
      • 3. Results and Discussion
        • 3.1. Failure Mode
        • 3.2. Load-deflection behavior
        • 3.3. Concrete compressive strain
        • 3.4. Steel tensile strain
        • 3.5. Crack opening behavior
        • 3.6. Comparison of NLFEA with theoretical models
      • 4. Conclusions
  • 11
    • The mechanical properties of the expandable polyurethane resin based on its volumetric expansion nature
      • 1. Introduction
      • 2. Methods and Materials
        • 2.1. The aim of the experiment
        • 2.2. Samples preparation
        • 2.3. Determination of the resin densities
        • 2.4. Samples testing using the uniaxial compression test
      • 3. Results and Discussion
      • 4. Conclusion
      • 5. Acknowledgment
  • 12
    • Improved gradient projection method for parametric optimisation of bar structures
      • 1. Introduction
      • 2. Methods
        • 2.1. Parametric optimization problem formulation
        • 2.2. An improved gradient projection method for solving the parametric optimization problem
    • Using Householder’s transformations described above triangular structure of the nonzero elements of matrix is formed step-by-step. Besides, Eq. (2.7) and Eq. (2.9) can be rewritten as follow:
      • 3. Results and Discussion
        • 3.1. Parametric optimization of a three-bar truss
        • 3.2. Optimization of a ten-bar cantilever truss
        • 3.3. Optimization of a 24-bar transmission tower
      • 4. Conclusion
      • 5. Acknowledgement
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