In limit design states,the different limitations of gapping between the subsoil and the foundation slab of high-rising structures have been requested in existing technical norms, however, the calculation methods of gapping are not given very clearly. This is really inconvenient in foundation design for engineers. Taking the rectangular foundation as an example, based on the half-plane contact stress theory and the linear elastic stress distribution assumption, the different calculation methods of base gapping area and contact stress are deduced and compared respectively. Similarly, taking the circular wind turbine foundation as an example, based on the half-space contact stress theory and the linear elastic stress distribution assumption, the analysis and comparison are also made. The gapping limitations and formulas can be use as a reference for actual engineering design analysis.
Key words
high-rising structure /
wind turbines /
foundation gapping /
eccentricity /
contact stress
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