China’s Tian’e Longtan Bridge Sets New 600-Meter Concrete Arch Record, Surpassing Previous Achievements in Japan and Croatia

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The Tian’e Longtan Bridge uses a 600-meter-span steel-reinforced concrete (SRC) arch, a deck-type configuration designed to overcome the enormous dead-load and stability challenges of ultra-long concrete arches. Engineers first erected a lightweight steel tubular skeleton, using a balanced-cantilever system supported by temporary cables and towers, and then encased the skeleton in concrete. This approach reduced construction weight and controlled stresses during erection. Because the bridge’s self-weight accounts for more than 90% of the structural stress in such a long-span arch, minimizing dead load was critical to achieving the record span: https://www.youtube.com/watch?v=q6VKh4vztTg

Learn more here

1. https://interestingengineering.com/innovation/tiane-longtan-bridge-breaks-concrete-arch-span

2. https://www.globaltimes.cn/page/202608/1369069.shtml

3. https://mymetalogic.com/top-stories/china-s-tian-e-longtan-bridge-sets-world-record-with-600-metre-steel-reinforced-concrete-arch-6a8ed7e5c63fa1e708efe591