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Comparison of Punching Shear Design Provisions for Flat Slabs
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
2017 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

Abstract

A new generation of EN 1992-1-1 (2004) also known as Eurocode 2 is under development

and currently there is a set of proposed provisions regarding section 6.4

about punching shear, PT1prEN 1992-1-1(2017). It was of interest to compare the

proposal with the current punching shear design provisions.

The aim of this master thesis was to compare the punching shear resistance obtained

in accordance with both design codes. Furthermore the eect of some parameters

on the resistance was to be compared. It was also of interest to evaluate the userfriendliness

of the proposal.

In order to meet the aim, a case study of a real  at slab with drop panels was performed

together with a parametric study of a pure ctive  at slab. The parametric

study was performed for inner, edge and corner columns in the cases prestressed,

without and with shear reinforcement.

It was concluded that the distance

av from the column axis to the contra  exural

location has a big in uence on the punching shear resistance. The factor

ddg

considering concrete type and aggregate properties also has a big impact on the resistance.

The simplied estimation of

av according to 6.4.3(2) in PT1prEN 1992-1-1

(2017) may be inaccurate in some cases.

The length

b0 of the control perimeter has a larger eect on the resistance in EN

1992-1-1 (2004) than in PT1prEN 1992-1-1 (2017).

In PT1prEN 1992-1-1 (2017), studs located outside the second row has no impact

on the resistance.

The tensioning force in a prestressed  at slab has a larger in uence on the resistance

in PT1prEN 1992-1-1 (2017) than in EN 1992-1-1 (2004). Furthermore,

the reinforcement ratio is increased by the tendons, and thus aect the resistance in

PT1prEN 1992-1-1 (2017).

Clearer provisions for the denition of the support strip

bs for corners and ends

of walls are needed in PT1prEN 1992-1-1 (2017).

It may be questionable if the reduction of the perimeter for a large supported area in

accordance with 6.4.2(4) in PT1prEN 1992-1-1 (2017) underestimates the resistance

v

in some cases.

Considering the work-load with PT1prEN 1992-1-1 (2017), more parameters are

included. However, they may not require that much eort to obtain.

Keywords: Punching shear, resistance, concrete,  at slab, design provisions, Eurocode

2, case study, parametric study, shear reinforcement, prestressed

vi

Ort, förlag, år, upplaga, sidor
2017. , s. 144
Serie
ISRN KTH/BKN/EX-517-SE ; 517
Nyckelord [en]
Punching shear, resistance, concrete, flat slab, design provisions, Eurocode 2, case study, parametric study, shear reinforcement, prestressed
Nationell ämneskategori
Husbyggnad
Identifikatorer
URN: urn:nbn:se:kth:diva-215631OAI: oai:DiVA.org:kth-215631DiVA, id: diva2:1148418
Externt samarbete
Tyréns
Ämne / kurs
Betongbyggnad
Utbildningsprogram
Civilingenjörsexamen - Samhällsbyggnad
Handledare
Examinatorer
Tillgänglig från: 2017-10-13 Skapad: 2017-10-11 Senast uppdaterad: 2017-10-13Bibliografiskt granskad

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