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A general framework for modeling long-term behavior of earth and concrete dams

Frontiers of Structural and Civil Engineering 2011年第1期5卷 41-52页

作者： Bernhard A.SCHREFLER francesco pesavento Lorenzo SANAVIA Giuseppe SCIUME Stefano SECCHI Luciano SIMONI Department of Structural and Transportation Engineering University of PadovaPadova 35131Italy CNR ISIB PadovaItaly

Many problems are linked with the long-term behavior of both earthdams and concrete *** range from hydraulic fracturing to alkali-silica reaction(ASR)and to repair work in concrete dams,from seismic behavior to secondary consolidation in earthdams.A common framework for the simulation of such systems is shown,based on the mechanics of multiphase porous *** general model is particularized to specific situations and several examples are shown.

关键词： earth dams concrete dams multiphase porous materials coupled problems hydraulic fracture concrete hydration alkali-silica reaction(ASR) finite element method

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Modelling strains of cementitious building materials maturing in variable hygrothermal conditions with mechanics of porous media

Modelling strains of cementitious building materials maturin...

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2010年建筑环境科学与技术国际学术会议

作者： Dariusz Gawin Mateusz Wyrzykowski francesco pesavento Dept.of Building Physics and Building Materials TU Lodz Al.Polotechniki690-924 Lodz-Poland Dept.of Structural and Transportation Engineering Padova University Via F.Marzolo 935131Padova-Italy

＜正＞A novel model of hygrothermal performance of cement based building materials during their maturing,considering evolution of their strength properties and deformations（shrinkage and creep strains）,described in terms of effective stress is briefly *** is described by means of the modified microprestress-solidification theory by Bazant et al.,with some modifications to take into account the effects of temperature and relative humidity on the cement hydration. Shrinkage strains are modelled by using effective stresses in the form introduced by Gray and Schrefler, giving a good agreement with experimental data also for low values of relative *** of two numerical examples based on the real experimental tests are solved to validate the model. They demonstrate its possibilities to analyze both autogenous deformations in maturing cementitious materials,and creep and shrinkage phenomena,in building elements of different age,sealed or drying at various conditions.

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