18 May 1876|
|Died||12 August 1940(aged 64)|
|Alma mater||Kristiania Technical School in 1891-92
Kristiania Fine Art School
Technische Hochschule Charlottenburg
|Known for||Såheim Power Station
Tyssedal Power Station
Norsk Hydro administration building
Tinnoset Line and Rjukan Line stations
|Style||Neoclassicism, functionalism, jugendstil|
|Relatives||Eivind Astrup (brother)
Sigurd Astrup (brother)
Henning Astrup (brother)
He was born in Kristiania (now Oslo), Norway. He was the son of city captain Harald Astrup and Johanne Emilie Smith. He was a brother of Arctic explorer Eivind Astrup (1871–1895), merchant Sigurd Astrup (1873–1949) and architect Henning Astrup (1864–1896). His sister Hanna (1869–1933) was married to politician Peter Andreas Morell.
He was educated at Kristiania Technical School in 1891-92 and Kristiania Fine Art School the following year. He also attended Technische Hochschule Charlottenburg from 1896-97. In 1899 he started to work as an architect with Henrik Nissen and Henrik Bull. In 1901, he opened architectural practice in Kristiania. From 1934, he worked together with his son, architect Henning Thorvaldsson Astrup (1904-83), under the company name Thorvald and Henning Astrup. 
Astrup specializing in industrial constructions, particularly related to power production and transmission, factories and dams; many monumental installations were built in neoclassical or functionalistic style. These include Såheim Power Station in Rjukan (1916), Tyssedal Power Station (1906), while the administration building for Norsk Hydro in Rjukan is built in jugendstil style. His neoclassical buildings included the Soria Moria cinema in Oslo (1928). Astrup also designed all the railway stations on the Tinnoset Line and Rjukan Line. 
- Geir Tandberg Steigan. "Thorvald Astrup (1876-1940)". arkitekturhistorie.no. Retrieved August 1, 2017.
- Susan Barr. "Eivind Astrup". Norsk biografisk leksikon. Retrieved August 1, 2017.
- Axel Mykleby. "Henning Astrup". Norsk kunstnerleksikon. Retrieved August 1, 2017.
- Sprauten, Knut. "Peter Andreas Morell". In Helle, Knut. Norsk biografisk leksikon. Kunnskapsforlaget. Retrieved 3 March 2016.
- Julius Malling, Axel Mykleby. "Thorvald Astrup". Norsk kunstnerleksikon. Retrieved August 1, 2017.
- Bjørn Cappelen. "Henning Astrup – 1900-tallet". Store norske leksikon. Retrieved August 1, 2017.
- See also Norwegian Museum of Hydropower and Industry
- Payton, Gary & Lepperød, Trond (1995). Rjukanbanen; på sporet av et industrieventyr (in Norwegian). Rjukan: Mana Forlag. p. 203.
- Åse Moe Torvanger. "Thorvald Astrup". Norsk biografisk leksikon. Retrieved August 1, 2017.
- "Soria Moria kino". Kulturminnesøk. Retrieved August 1, 2017.
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