introduction to earthquake engineering - universität · pdf fileintroduction to...

Introduction to Introduction to

Earthquake EngineeringEarthquake Engineering

Prof. Dr.Prof. Dr.--Ing. Uwe E. Ing. Uwe E. DorkaDorka

Behaviour of structuresBehaviour of structures

under earthquakesunder earthquakes

Earthquake EngineeringEarthquake EngineeringProf. Dr.Prof. Dr.--Ing. Uwe E. DorkaIng. Uwe E. Dorka Stand: 04.07.2006

22

Conventional rc-frame structure under Kobe earthquake


33

Non-linear Cyclic Behavior of Frames

From Müller, Keintzel (2)

Failure in soft storey

From Petersen (9)


44

From Wakabayashi (1)

flexural failure shear failure sliding failure rotation of foundation

Non-linear Cyclic Behavior of Walls


55

Flexural cyclic behaviour in plastic hinges


Behaviour of Reinforced-Concrete Structures

From Earthquake Spectra (10)

ϕϕϕϕ


66

Buckling of longitudinal reinforcement


Behaviour of Columns



77


Behaviour under combined bending (moment and shear)

and axial forces: The rc-beam-column

From Petersen (9)



88

Short column:


99From Wakabayashi (1)

Extreme pinching of hysteresis loop and failure in shear


Short Columns


1010

pinching effect and deterioration by large shear

Frame Corners



1111


Complicated details in rc-frames:


1212

Shear walls




1313

Wall openings




1414

Coupled shear walls




1515


Pre-cast connections



1616

Conventional steel structure under Kobe earthquake: Soft storey

Behaviour of Steel Structures


1717

Behaviour of Steel Structures

Plastic hinges

Local Buckling under Cyclic Loading

From DGEB (8)


1818

Relationship between moment and rotation angle for a beam under cyclic loading



1919

Horizontal load-deflection relationship of beam columns with various values of

width-thickness ratios


(a) b/t = 8

(b) b/t = 11

(c) b/t = 16

From Petersen (9)


2020

Cyclic buckling of struts





2121

Load-deflection relationship for a braced full-scale portal frame under a

constant vertical load and an alternately repeated horizontal load

P= 0,5*Npl

H HP= 0,5*Npl



2222

Fracture in connections

Both Pictures from earthquake Spectra (10)


2323

Fracture in connections

Both Pictures from earthquake Spectra (10)


2424

Seismically sound connections



2525

Modern Japanese residential structure under Kobe earthquake:

Behaviour of Timber Structures


2626


Behaviour of Timber Structures


2727



2828


Load-deflection relationship for a timber wall under

alternately repeated shear force


2929

Masonry Structures



3030


3131

Horizontal load-deflection relationships

for a pier subjected

to reversed shear and failing in shear



3232



3333

Masonry infilled frames



3434

Historic Structures


3535

Historic Structures



3636

Historic Structures


3737

Historic Structures


3838

Bridges

Both Pictures from Earthquake Spectra (10)


3939



4040



4141



4242

From Petersen (9)



4343

References

(1) Wakabayashi –

Design of EarthquakeDesign of Earthquake--Resistant BuildingsResistant BuildingsMcGraw-Hill Book Company

(2) Müller, Keintzel –

ErdbebensicherungErdbebensicherung von von HochbautenHochbautenVerlag Ernst & Sohn

(3) Deutsche Gesellschaft fürErdbebeningenieurwesen - DGEB

SchriftenreiheSchriftenreihe derder DGEB, Heft 2DGEB, Heft 2Elsevier

(4) Petersen

StatikStatik und und StabilitStabilitäätt derder

BaukonstruktionenBaukonstruktionenVieweg

(5) Jack P. Moehle

Earthquake Spectra Earthquake Spectra –– April 1995April 1995

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