2013, Volume 15, Issue 8
Strategic Study of CAE >> 2013, Volume 15, Issue 8
Reinforcement design of anchor blocks for external tendons
1. National Engineering Research Center for Prestressing, Southeast University, Nanjing 210096, China;
2. China Highway Planning and Design Institute (HPDI) Consultants, Inc., Beijing 100088, China
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Abstract
Reinforced blocks are common anchorage forms for external tendons. However, there was no mature design method. Through finite element analysis, the paper revealed that the tensile stress concentration was caused by three typical local actions. On this basis, three equations for calculating resultant forces of these local actions were formulated. Thus a quantitative reinforcement design method of anchor blocks was proposed. Finally, an anchor block of the Fourth Nanjing Yangtze River Bridge was presented as a design example to demonstrate the effectiveness and convenience of the proposed method.
Keywords
anchor block ; external prestressing ; reinforcement design ; bursting force ; cantilever action ; tie-back
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References
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