Journal
JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
Volume 25, Issue 6, Pages 576-586Publisher
VILNIUS GEDIMINAS TECH UNIV
DOI: 10.3846/jcem.2019.10374
Keywords
cable-pylon anchorage zone; strut-and-tie model; topology optimization; prestressing tendon; design approach
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Funding
- National Natural Science Foundation of China [11672108, 11202080]
- Qingdao Postdoctoral Sustentation Fund [2017201]
- Science and technology project of Guangdong transportation department [2012-02-024]
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The cable-pylon anchorage zone is a typical D-region in a cable-stayed bridge, for which there has been no uniform simplified design method until now. In this paper, based on the extensive statistics of actual projects, topology optimization techniques and principle of minimum strain energy, two precise strut-and-tie models for the cable-pylon anchorage zone are proposed, which can clearly reveal the load-transmitting mechanism of the anchorage zone. The explicit geometric parameters of the strut-and-tie models are derived; thus, the designers can directly use these models. A simple design procedure to deploy prestressing tendons in the anchorage zone is also introduced, whose effectiveness and convenience are demonstrated by two design examples. A new design named the one-way prestressing tendons PC cable-pylon is also discussed regarding its application scope.
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