# Reinforced Concrete Construction (BIW2-05)

## Table of contents

## General Information

Lecture:

Postdoc

NameMs Dr.-Ing. Kerstin Speck

Teaching

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Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

Visiting address:

ABS, Floor 05, Room 038 August-Bebel-Straße 30/30A

01219 Dresden

Exercise**:**

Research Associate

NameMr Jan-Hauke Bartels M.Sc.

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Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

Visiting address:

ABS, Room 07-001 August-Bebel-Straße 30/30A

01219 Dresden

Research Associate

NameMr Dipl.-Ing. Berk Gündogdu

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Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

Visiting address:

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

01219 Dresden

Receipt and distance learning:

Research Associate

NameMs Dipl.-Ing. Clara Schramm

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Technische Universität Dresden - Institute of concrete structures

Technische Universität Dresden - Institute of concrete structures

Visiting address:

ABS, Room 07-005 August-Bebel-Straße 30/30A

01219 Dresden

Arbeitsmaterialien werden im OPAL bereitgestellt.

**Contents and qualification objectives:**

The content of the module is the design, construction and dimensioning fundamentals of reinforced concrete construction as well as the essential models for the verification of typical reinforced concrete components.

Upon completion of the module, students will have knowledge of the calculation models for load-bearing capacity under stress due to bending, longitudinal force, shear force and torsion, as well as their combinations, based on the strength, deformation and composite properties of the materials concrete and reinforcing steel. Included are the stability checks for displaceable and non-displaceable systems. Furthermore, they know the parameters characterizing the service condition (cracking, deflections, creep and shrinkage deformations, stresses). Furthermore, they master the principles of anchorages and connections. Upon completion of the module, students will be able to design, construct and dimension common reinforced concrete cross-sections and structural members. In particular, this includes bearing areas, frame nodes, frame corners, and concentrated force applications.

Students understand how prestressed concrete works and are familiar with common prestressing methods. The special features and advantages compared to classic reinforced concrete are recognized. Students will be able to calculate the effects of prestressing on the internal forces in the structure (prestressing load case, friction and wedge slip, shrinkage and creep) and to design and construct prestressed concrete members.

**Teaching methods:**

5 SWS lecture and 3 SWS exercise.

**Prerequisites for participation: **

The competences to be acquired in the modules of the basic studies (BIW1-01 to BIW1-11) as well as fundamentals of design (BIW2-01) and statics (BIW2-02) are assumed.

**Usability:**

The module is a compulsory module in the undergraduate diploma program in civil engineering. It creates the prerequisites for the modules BIW3-02, BIW4-05, BIW4-09, BIW4-11, BIW4-12, BIW4-16, BIW4-17, BIW4-21, BIW4-52, BIW4-66, BIW4-76 as well as BIW4-77.

**Prerequisites for Award of Credit Points:**

Credit points are earned when the module examination is passed. The module examination consists of a written test (180 min).

Pre-requisite for the examination is an assignment in the amount of 60 hrs.

**Credit points and grades:**

8 credit points can be acquired through the module.

The module grade results from the grade of the written examination.

**Frequency of module:**

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

**Workload:**

The total workload is 240 hours.

**Duration of Module:**

5th semester: 2 SWS lecture and 1 SWS tutorial

6th semester: 3 SWS lecture and 2 SWS tutorial

## Lecture

Introduction(Historical overview, mode of action of reinforced concrete) |

Material properties(Concrete and its components, reinforcing steel, bond between concrete and steel) |

Safety theoretical basics(Safety concepts according to EC0, load assumptions according to EC1) |

Bending design of reinforced concrete cross sections(assumptions on load and bearing capacity, strain relations and safety factors, design diagrams and tables for rectangular cross-sections, contributing slab width of T-sections, design of general cross-sections, introduction of the stress block, imputation of a compression reinforcement, oblique bending, minimum reinforcement to ensure a required ductility) |

Shear force design of reinforced concrete cross sections(Models for shear force design, differences between DIN 1045, DIN 1045-1 and EC 2, special case of punching shear) |

Design for torsional loading(including superposition with shear force loading) |

Normal force stress without risk of buckling(tension and compression force without and with eccentricity) |

Stability of compression members(Basics, stability criteria, derivation of design diagrams, design according to DIN 1045-1, consideration of deformation and internal force growth according to 2nd order theory, investigation of storey frames, unwanted eccentricity, simple bracing checks) |

Serviceability limit states(order of classes of demands, crack width limitation, minimum reinforcement due to constraint, deformation limitation, bending slendernesses, limitation of steel stresses under non-stagnant loading) |

Basics of prestressed concrete(Principle and static effect of prestressing, normal stresses and internal forces, loss of prestressing force due to friction, creep and shrinkage, force application, verification in GZT) |

## Exercise

Accompanying the lecture on reinforced concrete construction, a total of 20 exercises will be held during the 5th and 6th semesters. **Part I** (1st-16th exercise) deals with **reinforced concrete construction **and **Part II **(17th-20th exercise) with **prestressed concrete construction.**

The exercises have the following contents:

Part I: Reinforced concrete construction |

Task definition, load assumptions (EC1 T1-10)dead loads, live loads, snow, wind |

Determination of characteristic internal forces of relevant cross sectionsStructural idealization, load cases, characteristic internal forces |

Determination of design internal forcescombinations of actions in the GZT, combinations of actions in the GZG |

Bending design of a slab stripetermination of the basic input variables for the design (exposure classes, concrete cover/cross-section values, building materials), bending design in the field, bending design above the support, determination of the minimum reinforcement due to restraint effect at the edge support and to ensure ductile component behavior |

Bending design of a plate beamDetermination of the effective slab width, moment filleting above the column, bending design in the field, bending design above a column (with compressive reinforcement), removal of the reinforcement above the column in the effective slab width, drawing of the determined reinforcements |

Shear force design on a plate beamShear force transfer between beam web and chord, graphical representation of the determined reinforcements |

Design of a single-span beam with combined shear force-torsion loading (GZT only)Verification of the torsional load capacity, verification of the combined loading, determination and arrangement of the determined reinforcement, drawing representation |

Verification against punching shear on the single foundationInternal forces determined using the strip method, minimum moments, verification without punching shear reinforcement |

Verification against punching shear at the single foundationVerification with punching shear reinforcement, minimum reinforcement and design rules, reinforcement arrangement / graphic representation |

Bracing and column designGeneral information on stiffening structures, displaceable / non-displaceable systems, buckling length, buckling shape, model column method using the example of a pendulum column, minimum and maximum reinforcement |

Column designBending moments in columns for frame-like structures (Cu / Co method), design of an edge column using the model column method, reinforcement layout and joints, drawing representation |

Verifications in the serviceability limit state at the plate beamDetermination of the minimum reinforcement for crack width limitation, verification of crack width limitation without direct calculation |

Verification of the serviceability limit state of the plate beamVerification of crack width limitation without direct calculation, determination of the calculated value of the crack width (direct calculation) |

Reinforcement and design rulesAnchorage lengths and lap joints |

Reinforcement and design rulesTensile force cover line, reinforcement drawings |

Part II: Prestressed concrete construction |

Design principlesLoad assumptions, internal forces, tendon behaviour, preliminary design |

Prestressing force lossesSelection of prestressing force and tendons, calculation of time-independent losses, determination of time-dependent losses, drawing representation |

Prestressing force losses and verifications in the GZGDetermination of time-dependent losses, stress verifications |

Bending design and constructive reinforcementsBending design, determination of minimum reinforcement, determination of splitting tensile reinforcement in the load introduction area, drawing representation (tendon laying plan, reinforcement drawings) |

## Document tasks

The acceptance of the document tasks 1-8 is a prerequisite for the admission to the examination in the subject reinforced concrete construction. The documents are to be worked on independently and should be prepared after the corresponding exercises. The total amount of 60 hours is distributed over the 5th and 6th semester. The beginning and the deadline of the respective assignment will be announced by the instructor. The processing period is usually two to three weeks after the deadline.

**Part I: Reinforced concrete construction**

01. | System identification, load assumptions and design internal forces |

02. | Bending design of plate beams |

03. | Shear force design of plate beams |

04. | Design of a cantilever beam for bending, shear and torsion |

05. | Design of a column and punching shear check on a floor slab |

06. | Serviceability limit state design |

**Part II: Prestressed concrete construction**

07. | Preliminary design of prestressing force |

08. | Preload losses |

## Testing

In each examination period an examination is offered. The exam consists of a theory part (45 min.) which has to be done without any documents and a calculation part (135 min.) where all documents may be used. The total duration is 180 min.

Examination requirements: Recognition of the document.

Exercises to prepare for the exam can be found in Opal.

## Literature

- Zilch, Zehetmaier:
*Bemessung im konstruktiven Betonbau. Nach DIN 1045-1 und DIN EN 1992-1-1*. 2. Auflage, Berlin : Springer, 2008, 284 S., 179 Abb., Softcover, ISBN-13: 978-3-540-20650-7 (Druckausgabe), 978-3-540-30953-6 (Online)– doi:10.1007/3-540-30953-5

(Grundlegende Bemessungs- und Nachweismodelle für Grenzzustand der Tragfähigkeit, Grenzzustand der Gebrauchstauglichkeit und der Dauerhaftigkeit; aktueller Normenbezug) - Fritz Leonhardt, Eduard Mönnig:
*Vorlesungen über Massivbau. Teil 1: Grundlagen zur Bemessung im Stahlbetonbau*. 3., völlig neubearb. u. erw. Aufl., Heidelberg : Springer, 1984, 361 S. – ISBN: 978-3-540-12786-4

(Standardwerk, grundlegende Modelle des Tragverhaltens, Konstruktionsempfehlungen, kein aktueller Normbezug) - Fritz Leonhardt, Eduard Mönnig:
*Vorlesungen über Massivbau. Teil 3: Grundlagen zum Bewehren im Stahlbetonbau*. 3. Aufl., Heidelberg : Springer, 1977, 246 S. – ISBN: 978-3-540-08121-0

(Standardwerk, grundlegende Modelle des Tragverhaltens, Konstruktionsempfehlungen, kein aktueller Normbezug) - Fritz Leonhardt, Eduard Mönnig:
*Vorlesungen über Massivbau. Teil 5: Spannbeton*. Heidelberg : Springer, 1980, 296 S. – ISBN: 978-3-540-10070- 6

(Standardwerk, grundlegende Modelle des Tragverhaltens, Konstruktionsempfehlungen, kein aktueller Normbezug)