Ernst Chwalla
Ernst Chwalla (born August 28, 1901 in Vienna , † June 1, 1960 in Vienna or Graz ) was an Austrian civil engineer .
Life
Ernst Chwalla, son of a Viennese silk industrial family, graduated in civil engineering from the Technical University of Vienna in 1924 . He was a research assistant to Friedrich Hartmann at the Institute for Bridge Construction. In 1926 he became a Dr.-Ing. With a thesis on the lateral stiffness of open bridges . PhD. In 1928 he completed his habilitation with a thesis on stability theory. In 1930 he was offered a professorship for structural engineering at the German Technical University in Brno and was head of the institute for structural engineering.
At the end of the war, Chwalla was taken prisoner by the Soviets and was interned in a Czech labor camp. With the help of professor colleagues in Brno, an investigation was initiated and in June 1945 he was released. Chwalla worked together with Karl Girkmann in Vienna as a freelance engineer and consultant for dam, power plant and pressure pipeline construction in post-war Austria and lectured on reinforced concrete at the University of Natural Resources and Life Sciences in Vienna . In 1955 he switched to the newly established professorship for structural engineering at the Graz University of Technology . He died of a heart attack.
From 1925 to 1960, Ernst Chwalla was the leading academic in the field of stability theory in steel construction. He published numerous scientific papers on the residual stresses after exceeding the elastic range in notches as well as on steel bars with and without eccentricities that were loaded far beyond the stability limit. His findings on stability theory were decisive. Together with Willy Gehler (TH Dresden) he was a pioneer of the steel construction standard DIN 4114, together with Kurt Klöppel (TH Darmstadt) he is considered the "father" of DIN 4114 (1952) stability cases. His work "Introduction to Structural Analysis" was a longstanding standard work for training at universities.
Awards
He was accepted into the Association of German Engineers . In 1954 he was awarded an honorary doctorate from a Dr.-Ing. Eh honored by the Technical University of Berlin . In 1959 Chwalla was elected a full member of the Austrian Academy of Sciences .
Fonts
- The stability of the frame rod , Hölder-Pichler-Tempsky AG, 1927
- The flat stability problem of the circular arc , Hölder-Pichler-Tempsky AG, 1927
- The stability of centrically and eccentrically pressed bars made of structural steel , Hölder-Pichler-Tempsky AG, 1928
- Elastostatic problems of slim, thin-walled pipes with a straight axis , Hölder-Pichler-Tempsky AG, 1931
- Exact theory of buckling of frame bars , 1933
- Three contributions to the question of the load-bearing capacity of statically indeterminate steel structures , 1934
- The problem of the stability of pressed frame bars , 1934
- The dimensioning of the horizontally stiffened web plates of full-walled beams , 1936
- The tilt stability of straight beams with a double-symmetrical I-cross section , Springer 1939
- Buckling and buckling regulations for steel construction: In addition to explanations on the justification for the draft standard sheet DIN 4114 and explanations on the dimensioning of buckling bars , German Standards Committee 1939, together with Willy Gehler
- Din E. 4114. Kinking and buckling regulations for steel construction: In addition to explanations z. Justification d. Draft standard sheet 1. T. Section A 1-A 3 , German Standards Committee 1939, together with Willy Gehler
- Proposal and explanations for the new version of Sections A, I, e of the standard sheet draft Din E 4114 , Stahlbau-Verlag 1940
- Buckling, tilting and buckling regulations for structural steel DIN E 4114: Draft 4a d. Consultation document from October 1943 , 1944
- Tilting of girders with single-symmetrical, thin-walled and open cross-sections , Springer 1944
- Introduction to structural engineering , Stahlbau-Verlag 1954
- Auxiliary tables for calculating stress problems of the second order theory and of buckling problems , Stahlbau-Verlag 1959
literature
- Kurt Klöppel : Prof. Dr. techn. Ernst Chwalla 50 years old , in Stahlbau , October 1951, pages 10–20
- Klaus Stiglat : Civil engineers and their work , Berlin: Ernst & Sohn , page 111 ISBN 3-433-01665-8
- Karl-Eugen Kurrer : Chwalla, Ernst . In: Austrian Biographical Lexicon 1815–1950 . 2nd revised edition (online only).
Web links
Individual evidence
- ↑ a b c d e entry about Ernst Chwalla in portal.suedmaehren.at , as of July 6, 2012
- ↑ a b c Klaus Stiglat: "Civil engineers and their work", John Wiley & Sons, 2004, 111
- ^ Obituary in: "Österreichisches Ingenieur-Archiv, Volumes 14-16", Springer 1960, page 77
- ^ A b Karl-Eugen Kurrer: History of Structural Analysis , Berlin: Ernst & Sohn 2002, p. 466 (biography), ISBN 3-433-01641-0 .
- ^ Ernst Chwalla: "Address and lecture on the occasion of the honorary doctorate at the Technical University of Berlin-Charlottenburg", Stahlbau-Verlag 1954
1. Chair for steel construction: Moritz Wappler (1846–1863) | Adolf Gabriely (1864-1893) | Josef Cecerle (1893–1919) | Georg Kapsch (1920–1929) | Franz Brunner (1930–1943) | Konrad Sattler (1944–1945) | Hermann Beer (1955–1972) | Friedrich Resinger (1974–1988) | Richard Pischl (1976-2004) | Richard Greiner (1981-2010) | Harald Unterweger (since 2011)
2. Chair for Roads and Transportation: Remigius Götz (1865–1866) | Karl Scheidtenberger (1866–1885) | Martin Kovatsch (1886-1894) | Emil Teischinger (1895–1921) | Valentin Köck (1921–1923) | Paul Döll (1924–1938) | Ernst Gottstein (1940–1945) | Alois Pendl (1946–1962) | Josef Raimund Dorfwirth (1964–1974) | Herbert Köstenberger (1974–1990) | Helmut Stickler (1995-2003) | Martin Fellendorf (since 2005)
3. Chair for structural engineering: Karl Stelzel (1876–1912) | Fritz Postuvanschitz (1913–1926) | Heinrich Leitz (1929–1930) | Heinrich Neukirch (1931–1939) | Hermann Beer (1940–1955) | Ernst Chwalla (1955–1960) | Konrad Sattler (1961–1975) | Peter Klement (1975–1993) | Gernot Beer (1993–2012) | Thomas-Peter Fries (since 2013)
4. Chair for hydraulic engineering and water management: Wilhelm Heyne (1876–1894) | Philipp Forchheimer (1894–1914) | Hans Paul (1915–1938) | Armin Schoklitsch (1939–1945) | Hermann Grengg (1950–1962) | Helmut Simmler (1964–1987) | Günther Heigerth (1989–2006) | Gerald Zenz (since 2007)
5. Chair for concrete construction: Robert Bortsch (1928–1941) | Hermann Craemer (1941–1945) | Erich Friedrich (1948–1966) | Fritz Bauer (1967–1980) | Richard Küng (1973–1994) | Adalbert Koberg (1981-1995) | Lutz Sparowitz (1994–2009) | Viet Tue Nguyen (since 2010)
6. Chair for Railways and Transport Economics: Paul Döll (1940–1943) | Erwin Massute (1943–1945) | Karl Klugar (1969–1982) | Klaus Rießberger (1984–2009) | Peter Veit (since 2010)
7. Chair for Urban Water Management and Landscaping: Max Breitenöder (1957–1964) | Ernst Nemecek (1965–1988) | Helmut Renner (1983–2000) | Harald Kainz (since 2001) | Dirk Muschalla (since 2012)
8. Chair for Soil Mechanics, Foundation Engineering and Numerical Geotechnics: Christian Veder (1964–1979) | Heinz Brandl (1979–1981) | Martin Fuchsberger (1982-1993) | Stephan Semprich (1993–2011) | Roman Marte (since 2012)
9. Chair for Building Construction: Fritz Reischl (1964–1981) | Horst Gamerith (1981-2006) | Peter Kautsch (2008–2019) | Oliver Englhardt (2010–2017) | Michael Monsberger (since 2016) | Christina Hopfe (since 2020)
10. Chair for Construction Management and Construction: Rudolf Aita (1970–1978) | Norbert Raaber (1981-1996) | Gert Stadler (1996-2006) | Hans Lechner (2002–2013) | Detlef Heck (since 2006) | Gottfried Mauerhofer (since 2013)
11. Chair for materials testing and building material technology: Helmut Geymayer (1980–2002) | Peter Maydl (since 2003) | Markus Krüger (since 2015)
12. Chair for building mechanics: Rudolf Greimel (1985–2004) | Martin Schanz (since 2005)
13. Chair for rock mechanics and tunnel construction: Wulf Schubert (1993–2018) | Thomas Marcher (since 2018)
14. Chair for structural engineering: Karl Kernbichler (1997-2004)
15. Chair for wood construction and wood technology: Gerhard Schickhofer (since 2004)
retired chair for building informatics: Ulrich Walder (2004–2013); retired chair for hydraulics and hydrology: Ferdinand Wehrschütz (1974–1995) | Heinz Bergmann (1975-2002)
| personal data | |
|---|---|
| SURNAME | Chwalla, Ernst |
| BRIEF DESCRIPTION | Austrian civil engineer |
| DATE OF BIRTH | August 28, 1901 |
| PLACE OF BIRTH | Vienna |
| DATE OF DEATH | June 1, 1960 |
| Place of death | Vienna or Graz |