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Mechanical effects of floods on river bridge pier foundations

 Mechanical effects of floods on river bridge pier foundations
Author(s):
Presented at IABSE Symposium: Large Structures and Infrastructures for Environmentally Constrained and Urbanised Areas, Venice, Italy, 22-24 September 2010, published in , pp. 878-879
DOI: 10.2749/222137810796064219
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Limit states of the soil (G)–foundation (F)– river bridge pier (P) system, potentially occurring during a flood, are analysed. An original constitutive model (c.m.) first allows to simulate the dis...
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Bibliographic Details

Author(s):
Medium: conference paper
Language(s): English
Conference: IABSE Symposium: Large Structures and Infrastructures for Environmentally Constrained and Urbanised Areas, Venice, Italy, 22-24 September 2010
Published in:
Page(s): 878-879 Total no. of pages: 8
Page(s): 878-879
Total no. of pages: 8
Year: 2010
DOI: 10.2749/222137810796064219
Abstract:

Limit states of the soil (G)–foundation (F)– river bridge pier (P) system, potentially occurring during a flood, are analysed. An original constitutive model (c.m.) first allows to simulate the displacements of a rigid, shallow F resting on compressible G, subjected to vertical, horizontal forces and destabilizing moments transmitted by P. The tilt and the stability of the G-F–P system are then modelled on the base of the c.m., by taking into account the complex relationships among the tilt of P, the scour of G and the hydrodynamic forces (horizontal force on P and uplift on F). It is shown that the tilt of P may increase towards a stable value, or reach a critical value (rotational instability) that occurs before the bearing capacity of the F–G sub-system is achieved.

Keywords:
pier high-rise buildings foundation constitutive model flood elasto-plasticity