ENG_01_L 01

Course

Reinforced and Prestressed Concrete (RPC I)

2nd Year, 2nd Sem.

Contact info:

Assist. Lect. PhD Eng. Dumitru MOLDOVAN Mission Impossible: Asking questions Urgent matters: [email protected] 5 laboratories:1. 2. 3. 4. 5.

Content: 1 + 5: today 2: characteristic strength 3 + 4: voluntary

Testing concrete and/or steel. Non-destructive test methods Testing concrete and/or steel. Destructive test methods Testing concrete. Modulus of Elasticity Testing concrete. Bond Strength Reinforcement types for constructions

Click to edit Master subtitle style 9 seminars:1. 2. 3. 4.

Design of singly reinforced rectangular cross-sections Design of doubly reinforced rectangular cross-sections Design of singly reinforced tee/flanged cross-sections Shear design

5.

Design examples and studies

[1] : [3]

4/5/12

Assist. Lect. PhD Eng. Dumitru MOLDOVAN, Assist. Lect. PhD Eng. Dan BOMPA

[1]

Course


2nd Year, 2nd Sem.

Pass course conditions: Examen:

Absences: less than 40%Less than 20%: FREE From 20 to 40%: FEE ONLY According to schedule (last 2 weeks)

Around 20 questions: Some design similar to Seminars One larger Theory Subject

Click to edit Master subtitle style

Rule: References:

1.

Ask, Ask again, Ask one more timeIndrumtor de laborator (C. MGUREANU et al.) Proiectarea structurilor din beton dup SR EN 1992 (T. ONET & Z. KISS) Manual for Advance Design (MAD) (D. MOLDOVAN & H. CONSTANTINESCU) Other books[2]

1. 2.

3.

4.

[2] : [3]

4/5/12


Course


2nd Year, 2nd Sem.


Questions?[3]

[3] : [3]

4/5/12


1st Laboratory

Testing concrete and/or steel. Non-destructive test methods

1st Week

What are non-destructive test methods? Usage? Advantages? Types: hardness ultrasonic others combined

Testing Concrete. Hardness method (Schmidt Hammer) Surface conditions: flat smooth, clean, dry, draw test grid-

Indentation: Read two perpendicular diameters of the same indentation Calculate mean/(average/medium) diameter and use tabulated values to extract mean Click to edit Master subtitle style concrete strength Rebound: Determine rebound index, n Calculate the total coefficient of influence and use tabulated values to extract mean concrete strength

-

4/5/12 [1] : [2]

Cement Cement dosage Aggregate Concrete Relative Humidity (RH) conditions type Dumitru MOLDOVAN, Assist. Lect. PhD Eng. Dan BOMPA type age Assist. Lect. PhD Eng. [4]

1st Laboratory


1st Week

Testing Concrete. Ultrasonic pulse method Surface conditions: flat smooth, clean, dry, apply coupling medium and press hard transducer on the surface-

Calculate speed of ultrasonic pulse, vL Calculate the total coefficient of influence and use tabulated values to extract mean concrete strength

Cement Aggregate Cement type dosage type

Fine Testing steel (Cover m meter): fraction ratio (0-1 aggregat mm) e size

Maximu

Determine:


Relative Admixture Humidit s y (RH) conditio ns

Position, direction, diameter of bars Concrete cover

[2] : [2]

4/5/12


[5]

5th Laboratory


1st Week

What are rebars?

DEX:

ARMTUR, armturi, s.f. Totalitatea barelor metalice prinse ntre ele care ntresc o construcie (de beton armat sau precomprimat).

Bars for Reinforced Concrete (pasive reinforcement) and Tendons for Prestressed Concrete (active reinforcement: wire, bar, rod, strand or bundles of such elements)

Rebars (main reinforcement): - deformed bars: high strength steel (PC52, PC60) S400, S500, S600 - welded wire fabrics (sheets/roles): srm tras neted/amprentat pentru beton (STNB/STAB) to edit Master subtitle style Click Rebars (secondary/constructive reinforcement): - plain bars: low strength/mild steel (OB37) - Welded wire fabrics (STNB)

[1] : [11]

4/5/12


[6]

Laboratory 5


Week 1

Characteristics/properties for rebars:yielding limit yielding force/area of bar rupture/failure limit rupture force/area of bar


[2] : [11]

4/5/12


[7]

5th Laboratory


1st Week

Characteristics/properties for rebars: Characteristic values: Design values


s partial coefficient of safety k ratio of rupture limit to yielding limit (ft/fyk)[3] : [11]

4/5/12


[8]

5th Laboratory


1st Week

Characteristics/properties for rebars:Table C.1 in SR EN:1992-1-1 (Appendix C)


[4] : [11]

4/5/12


[9]

Laboratory 5


Week 1

rebarsMarca oel Diametru nominal Limita de curgere Rezistena la (mm) fyk [N/mm2] rupere ft [N/mm2] Denumire comercial

welded wiresProvenien

S255 S235 S355 S345 S335 S420 S405 S395 S500 S490 S440 S390 S500 S460[5] : [11]

6-12 14-40 6-14 16-28 32-40 6-12 14-28 32-40 6-28 3-4 4.5-7.1 8-10 3-10 6-10

255 235 355 345 335 420 405 395 500 490 440 390 500 460

360 510

OB37 PC52

RO RO

590

PC60

RO

Click to edit Master subtitle style550 590 (600) 540 (550) 490 (500) 550 (525) 510 Bst500M SPPB EU RO[10]

Bst500S STNB

EU RO

4/5/12


Laboratory 5


Week 1

Storage

BendingClick to edit Master subtitle style

Placing[6] : [11]

4/5/12


[11]

5th Laboratory


1st Week

Placing


[7] : [11]

4/5/12


[12]

5th Laboratory


1st Week

Tendons (presstressed steel) Characteristic values Design Values


Diametru nominal (mm) Rezisten caraceteristic minim fpk (N/mm2)[8] : [11]

2.50 2010

3.00 1865

4.00 1715

5.00 1570

7.00 1470

8.00 1375

4/5/12


[13]

Laboratory 5


Week 1

Reinforced Concrete

Prestressed Concrete

[9] : [11]


[14]

Laboratory 5


Week 1

[10] : [11]


[15]

5th Laboratory


1st Week


Questions?[16]

[11] : [11]

4/5/12

Asist. Dr. Ing. Dumitru MOLDOVAN

Course


2nd Year, 2nd Sem.

Homework1. 2.

Non-destructive test methods. Usage, advantages. Over-lay in the same graph the stress-strain curves for the following steel grades: S400, S500, S600.

[1] : [1]


[17]

Documents

ENG_01_L 01