Building in Existing Contexts – Strengthening of Solid Structures (BIW4-12)

Table of contents

    1. General information
    2. Lecture
      1. Strengthening of concrete structures
      2. Measurement and testing technology
    3. Exercise
      1. Strengthening of concrete structures
    4. Practical courses
      1. Measurement and testing technology
    5. Assignment
    6. Exam
    7. Literature

General information

Lecture:

Steffen Marx © Stefan Gröschel
Name

Mr Univ.-Prof. Dr.-Ing. Steffen Marx

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Contact Information
Organization Name

Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

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Visiting address:

ABS, Room 05-011 August-Bebel-Straße 30/30A

01219 Dresden

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Address postal

Postal address:

TUD Dresden University of Technology Institut für Massivbau

01062 Dresden

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Parcel address:

TUD Dresden University of Technology Institut für Massivbau Helmholtzstr. 10

01069 Dresden

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+49 351 463-37289

Peter Betz im Portrait © Stefan Gröschel

Research Associate

Name

Mr Dipl.-Ing. Peter Betz

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Organization Name

Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

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Visiting address:

ABS, Room 05-015 August-Bebel-Straße 30/30A

01219 Dresden

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fax Fax
+49 351 463-37289

Foto zeigt David Sandmann © Stefan Gröschel

Wissenschaftlicher Mitarbeiter

Name

Mr David Sandmann M.Sc.

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Contact Information
Organization Name

Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

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Visiting address:

ABS, Room 05-019 August-Bebel-Straße 30/30A

01219 Dresden

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work Tel.
fax Fax
+49 351 463-37289

Foto ziegt ein Portrait von Torsten Hampel © Stefan Gröschel

Postdoc

Name

Mr Dr.-Ing. Torsten Hampel

Contract Research and Building Diagnosis

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Contact Information
Organization Name

Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

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Visiting address:

ABS, Room 05-035 August-Bebel-Straße 30/30A

01219 Dresden

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work Tel.
fax Fax
+49 351 463-37289

Portrait zeigt Jan-Hauke Bartels © Stefan Gröschel

Research Associate

Name

Mr Jan-Hauke Bartels M.Sc.

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Contact Information
Organization Name

Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

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Visiting address:

ABS, Room 05-002 August-Bebel-Straße 30/30A

01219 Dresden

work Tel.
fax Fax
+49 351 463-37289

You can find working material here OPAL.

Contents and qualification goals:

Contents of the module are analysis and recalculation as well as repair and strengthening of existing solid structures.
After completion of the module, students will be familiar with the methods of structural diagnosis using computational and experimental methods. They are able to analyze existing solid structures with regard to their condition and load-bearing behavior and to plan and calculate the necessary strengthening measures. Reinforcement with the aid of textile concrete is also a focal point.
After completing the module, students will have in-depth knowledge of modern concrete technology in the construction of existing and new buildings, particularly with regard to the production, properties and areas of application of high-performance concretes with and without fiber reinforcement.

Teaching methods:

4 SWS lecture and 2 SWS exercise

Prerequisites for participation:   

The competences to be acquired in the modules of the basic studies (BIW1-01 to BIW1-11) and the basic subject studies (BIW2-02 to BIW2-06) are required.

Applicability:

In the undergraduate diploma program in civil engineering: Compulsory elective module in the main course of study, in particular for the specialization in structural engineering In the postgraduate course of study in civil engineering: Compulsory elective module, in particular for the specialization in structural engineering.

Requirements for the award of credit points:

Credit points are earned if the module examination is passed. The module examination consists of one written examination (240min).

Credit points and grades:

8 credit points can be acquired through the module.

Frequency of the module:

Module is offered every academic year, starting in the winter semester.

Workload:

The total workload is 240 hours.

Duration of Module:

7th semester: 2 SWS Lecture Strengthening of concrete structures (Marx)
8th semester: 1,5 SWS Exercise Strengthening of concrete structures (Betz, Sandmann)
8th semester: 1 SWS Lecture High performance concretes (Mechtcherine)
8th semester: 1 SWS Lecture and 0,5 SWS Exercise measurement and testing technology (Hampel, Bartels)

Lecture

Strengthening of concrete structures

Introduction

  • Objectives (durability, reuse, strengthening)
  • Differences new / existing construction

Historical development in reinforced concrete construction

  • Development of concrete and reinforced concrete construction method
  • Typical historical solid construction
  • Development of standards
  • Historical building materials (steel, concrete)

Maintenance of structures

  • Condition development of structures
  • Preservation strategies

As-built analysis

  • Procedure
  • Investigation methods

Computational evaluation of the structural safety

  • Internal forces redistribution
  • Ultimate limit state method
  • Experimental structural safety assessment

Reinforcement of solid structures

  • In-situ concrete supplementation, shotcrete
  • CFRP lamellas
  • Textile concrete

For copyright reasons, the information material accompanying the lecture is only accessible to the participating students. Login and password will be announced in the lecture. 

Measurement and testing technology

Introduction

  • Objective of the lecture
  • Content of the lecture
  • Fields of application in civil engineering
  • Basic concepts of measurement and testing

Loading technique

  • Reproducibility of the test
  • Types of actions
  • Influence of the loading speed
  • Typical force-time functions in tree-mechanical tests
  • Force generation
  • Mass forces
  • Vibration exciters
  • Spring forces
  • Force introduction systems
  • constraint-free load introduction

Metrology

  • Structurally relevant measured quantities
  • Selection criteria for measurement technology
  • Mechanical measuring methods
  • Electrical measuring methods
  • Hydraulic stress transducer
  • Optical measuring methods

Tests in the test laboratory

  • Problem analysis
  • Test conception
  • Test object
  • Test setup
  • Test report
  • Examples for the design of experiments

Structural condition analysis

  • Structural analysis
  • Concrete investigations
  • Concrete corrosion
  • Reinforcement corrosion
  • Reinforcement search
  • Reinforcement acceptance
  • Crack analysis/cause of cracks
  • Crack width measurement
  • Crack monitoring
  • Example crack and temperature monitoring
  • Costs of structural monitoring

Measurement deviation and error calculation

  • Measurement deviation - definitions
  • Compensation of systematic errors
  • Error propagation
  • Safety in load tests

Experimentally based condition assessment of structures

  • Basic principles of experimental condition assessment
  • Areas of application
  • Structure/modes of operation of load frames
  • Experimental limit and target loads
  • Examples of experimental structural safety analysis

Exercise

Strengthening of concrete structures

The exercises will mainly deal with practical examples. It is shown how the analysis and evaluation of existing structures is carried out and which basic possibilities of further procedures exist. In addition to the technical possibilities, questions of economic efficiency and sustainability will be considered.

Practical courses

Measurement and testing technology

2 practical courses (duration 4-5 hours in total) take place in the

Otto Mohr Laboratory

Zellescher Weg 22
01062 Dresden statt.

Practical course 1  Familiarization with measurement and experimental techniques
Practical course 2 Carrying out small experiments

Assignment

No Assignment is foreseen.

Exam

The lecture will be completed with a written exam (240min).

Literature

  • fib-Bulletin 17: Management, maintenance and strengthening of concrete structures.
  • Quade, J. ; Tschötschel, M. (Hrsg.): Experimentelle Baumechanik. Düsseldorf : Werner-Verlag, 1993, ISBN: 3-8041-3074-7
  • Richtlinie für Belastungsversuche an Massivbauwerken, Teil 1 Hochbau. Deutscher Ausschuss für Stahlbeton (DAfStb), November 1998

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Last modified: Sep 22, 2022