Joachim Scheer

Joachim Scheer (born March 5, 1927 ) is a German civil engineer ( steel construction ) and professor emeritus at the TU Braunschweig .

Life

Scheer studied civil engineering at the TH Darmstadt from 1948 with his diploma in 1953. He then worked in a civil engineering company before becoming assistant to Kurt Klöppel at the Institute for Steel Construction at the TH Darmstadt. In 1959 he received his doctorate from Klöppel and in 1960 the buckling tables for plates appeared, which he had calculated with Klöppel (with the help of the IBM 704 computer, which IBM had donated to TH Darmstadt in 1958) and which were later widely used. In 1958 an essay was published that identified him as one of the pioneers of electronic billing in statics in Germany (another was the mathematician Alwin Walther from the TH Darmstadt and Klöppel himself). After completing his doctorate, he founded his own engineering office with Weihermüller in Wiesbaden . In 1970 he was offered a chair at the TH Darmstadt and a little later at the Technical University of Hanover , where he became a professor in 1971. In 1976 he became a professor at the TU Braunschweig, where he headed the chair of steel construction until his retirement in 1992.

He dealt in particular with the stability and load-bearing behavior of slim components in steel construction and especially with guyed masts, rope constructions, spatial structures and scaffolding made of steel. He also dealt with structural damage research. The reason for this occupation were several serious bridge accidents in the early 1970s: 1970 the failure of the bridge girder during the construction of the West Gate Bridge in Melbourne and the Cleddau Bridge in Milford Haven and in November 1971 the failure of the cantilever arm of the cantilevered structure during the construction of the south bridge (Koblenz) which buckled at a length of 52 m. As a result, Scheer and others undertook extensive large-scale tests to buckle plates, which were incorporated into DIN 18800, Part 3. Scheer saw numerous cases of mast failure as a further stimulus for damage research. Scheer was u. a. Checking engineer of the Grenzwaldbrücke .

He was a member of the German Committee for Steel Construction (DASt) and a member of the Braunschweig Scientific Society . He was chairman of the standard committees for DIN 18800, part 1 (dimensioning and construction of steel structures) and 3 (proof of the stability of plate-like steel components). Scheer was also the editor of the journal Der Bauingenieur for many years . In 1994 he received an honorary doctorate from the Technical University of Munich and in the same year received the German Steel Construction Award.

In September 2001 he published the special issue of the magazine Der Stahlbau on his teacher Klöppel and published memories of him in it.

Fonts

Use of program-controlled computing systems for static tasks, explained using the example of continuous beam calculation . In: Steel construction . 27 vol., Issue 9 and 10, 1958, p. 225-229 [H. 9], pp. 275-280 [H. 10] .
On the problem of the overall stability of single symmetrical I-beams . In: Steel construction . 28 vol., Booklet 5 (I. general derivations) and 6 (II. Numerical calculations), 1959, OCLC 73859410 , p. 113-126 [H. 5], pp. 165-171 [H. 6] (TH Darmstadt, F. f. Civil engineering, dissertation of December 18, 1958).
with Kurt Klöppel, Karl Heinrich Möller: Buckling values of stiffened rectangular plates . Reprint of the 1968 edition. Ernst, Berlin 2001, ISBN 3-433-02828-1 (first edition: 1960).
Failure of structures: causes, lessons . tape 1 : bridges . Ernst and Son, Berlin 2000, ISBN 3-433-01802-2 .
Failure of structures: causes, lessons . tape 2 : Buildings and special structures . Ernst and Son, Berlin 2001, ISBN 3-433-01608-9 .
- English edition: Failed bridges: case studies, causes and consequences . 2nd Edition. Ernst & Sohn, Berlin 2010, ISBN 978-3-433-02951-0 .
Extrapolating - Constraint and Risk for Civil Engineers . In: Abh. Braunschweigische Wiss. Ges. Band 45 . Erich Goltze KG, Göttingen 1995, p. 45–68 ( biblio.etc.tu-bs.de [PDF]).
with Joachim Lindner , Herbert Schmidt: steel structures. Explanations of DIN 18800, parts 1 to 4 , Ernst and Son 1992, 3rd edition 1998

literature

F. Nather: The steel construction. Volume 56, 1987, Issue 3, p. 94.
Udo Peil: Joachim Scheer 75 years . In: Steel construction . tape 71 , no. 3 . Ernst & Sohn, March 2002, p. 229 , doi : 10.1002 / stab.200200650 .
Udo Peil: Joachim Scheer 80 years . In: Steel construction . tape 76 , no. 5 . Ernst & Sohn, May 2007, p. 355–356 , doi : 10.1002 / stab.200790057 .
Klaus Thiele and Udo Peil: Joachim Scheer 90 years . In: Steel construction. Volume 86, No. 12. Ernst & Sohn, December 2017, pp. 1121–1125.

Individual evidence

^ After Karl-Eugen Kurrer : History of structural engineering. Ernst & Sohn 2016 "he was probably the first civil engineer in the German-speaking area who dealt extensively with the use of program-controlled calculators for static tasks in connection with the transfer process". That was long before the triumphant advance of the finite element method . The transfer method was developed in 1956 by S. Falk for any supported continuous beam and translated the differential equation for beams into the matrix calculus. The procedure presented in Scheer's article was also used in practice, for example in the engineering office of Dr. Homberg in Hagen.
↑ There were 13 deaths. His teacher Klöppel was a test engineer there, but the subsequent investigation (expert Otto Steinhardt ) absolved him of guilt, as did the design engineer (Scheer's memories of Klöppel, Der Stahlbau, September 2001) and the same bridge construction was often without the MAN plant in Gustavsburg Problems have been realized. A material defect was also excluded. Scheer was involved in the investigation; according to Steinhardt's report, the cause was a construction detail in the welding of the base plate and longitudinal stiffening elements. When construction was continued in April 1973, the bridge was strengthened beyond the original statics requirements. Scheer reports on the case in his book on Damaged Bridges (Failed Bridges, p. 58)
↑ Structurae to Scheer

personal data
SURNAME	Scheer, Joachim
BRIEF DESCRIPTION	German civil engineer
DATE OF BIRTH	March 5, 1927

[1] After Karl-Eugen Kurrer : History of structural engineering. Ernst & Sohn 2016 "he was probably the first civil engineer in the German-speaking area who dealt extensively with the use of program-controlled calculators for static tasks in connection with the transfer process". That was long before the triumphant advance of the finite element method . The transfer method was developed in 1956 by S. Falk for any supported continuous beam and translated the differential equation for beams into the matrix calculus. The procedure presented in Scheer's article was also used in practice, for example in the engineering office of Dr. Homberg in Hagen.

[2] There were 13 deaths. His teacher Klöppel was a test engineer there, but the subsequent investigation (expert Otto Steinhardt ) absolved him of guilt, as did the design engineer (Scheer's memories of Klöppel, Der Stahlbau, September 2001) and the same bridge construction was often without the MAN plant in Gustavsburg Problems have been realized. A material defect was also excluded. Scheer was involved in the investigation; according to Steinhardt's report, the cause was a construction detail in the welding of the base plate and longitudinal stiffening elements. When construction was continued in April 1973, the bridge was strengthened beyond the original statics requirements. Scheer reports on the case in his book on Damaged Bridges (Failed Bridges, p. 58)

[3] Structurae to Scheer