Stages of Guidelines preparation

Stage One – collection of data on monitoring and modelling (case histories), made by the authors – COMPLETED.

Stage Two – analysis of the acquired data by ТС 207 members, discussion, and 'calibration' of SSI analyses methods.

Stage Three – producing the Guidelines.

Suggested structure of the Guidelines

1. Main requirements to site investigations and soil characterization for soil-structure interaction analyses.
   Site investigations should constitute an information basis to obtain calculated values which are in agreement with measured values. Site investigations should provide parameters for contemporary non-linear soil models utilized in SSI analyses. It is necessary to evaluate applicability in numerical analyses of new time-related soil parameters which realistically represent the physical nature of soil deformation.
2. Analysis of the acquired monitoring data. Establishing the necessity of time-related settlement monitoring data collection.
   This chapter shall contain description of well documented sites, complete with information on ground conditions and detailed deformation monitoring data. The objective of this chapter shall be the compilation of a database to set the task of refinement of calculation methodology for subsoil deformation with account of superstructure stiffness. Sadly, the number of such observations throughout the world is clearly insufficient, which fact has necessitated setting the task to organize collection of settlement monitoring data.
3. Analysis of integrity faults in structures provoked by differential settlement.
   This chapter shall contain analysis of the typical defects in structures of existing buildings, caused by differential settlement. The buildings to be included will be taken from the settlement monitoring database, as well as from the range of other sites (e.g. historic buildings), where effects of differential settlement have been most clearly visible.
4. Identification of structural elements where significant loads are generated when considering soil-structure interaction effects.
   This chapter shall deal with the most critical structural locations in which additional stresses related to differential settlement need to be considered, based on studying characteristic defects in structures and results of SSI analyses. The intention of this chapter shall be to identify structures in design of which SSI analyses will be a prerequisite for obtaining realistic results.
5. Basic regularities, manifested in SSI analyses of buildings constructed on natural subsoil and on piled foundations.
   This chapter shall summarize basic regularities manifested in SSI related cases.
6. Development of guidelines on subsoil models for SSI analyses.
   This chapter shall contain practical guidelines as to which subsoil models ought to be used in SSI analyses. Those guidelines may be developed based on comparison of monitoring data (taken from the database discussed in 1 above) with calculation results pertaining to various models of soil behaviour.
7. Development of guidelines for SSI analyses of buildings and underground structures.
   In this chapter it is suggested to include practical guidelines on building finite element meshes and profiles for SSI analyses.
8. Development of guidelines on practical solutions to reduce differential settlements and correspondingly manage sensitivity of buildings.
   The intention of this chapter is to supply basic guidelines on superstructure design with account of differential settlements. Management of adverse effects of differential settlements is possible by means of both reducing spatial rigidity of buildings (a traditional approach being construction of movement joints), and increasing spatial rigidity of structures (especially in lower parts of buildings). The chapter will also contain practical guidelines for superstructure designers on how to use these approaches in various ground conditions.
9. Development of guidelines on Retaining Walls.

TC on Soil Structure Interaction Members

Vladimir Ulitsky, Chair
Michael Lisyuk, Vice Chair

Disclaimer

The compilers of these Guidelines wish it to be known that the content thereof and the opinions represented therein are not necessarily those of ISSMGE and reflect only the position and the views of the compilers themselves - members of ISSMGE TC 207 "Soil-Structure Interaction and Retaining Walls".