Abstract In the 1940’s, a reinforced concrete (RC) railway bridge located in central Johannesburg was constructed using Witwatersrand Quartzite, at time, unknown to be an alkali-silica reactive aggregate. The currently displays signs of distress form severe map-cracking. This study presents preliminary results series tests that have been conducted characterise severity alkali silica reaction (A...

Taking Haixin Bridge as an example, the structural response of a new type arch bridge composed inclined and curved beam under cable breaking is analyzed numerically. The at different positions, numbers broken cables ways are modeled calculated, remaining cables’ internal force main girder’s deflection selected research indexes to evaluate degree impact effect on bridge. numerical results show t...

background: the purpose of this study was to assess the dental arch dimensions in primary dentition of 3-5 years old filipino children and determining the existence of sexual dimorphism. m aterials and methods: in this descriptive study, 60 filipino preschool children aged 3-5 years old were selected from manila city. study casts were used for measurements of 3 arch dimensions: bicanine width, ...

This paper explores flood-induced hydrodynamic and debris impact forces on masonry arch bridges using the numerical method smoothed particle hydrodynamics (SPH). Masonry make up a significant proportion of bridge stock in many parts world, including UK US. Although is durable form, those spanning watercourses can be vulnerable to effects flooding. Where fast flood flows impinge superstructure, ...

To explore the different influence of traveling wave effect on isolated and non-isolated arch bridge, multi-span bridges models are established respectively, three measured seismic waves were selected, under eight kinds apparent velocities multi-point consistent excitations, structural responses two models, including internal force response, rib velocity, pier’s bridge deck acceleration, shear ...