Behavior of Selected Materials to Create Sliding Joint in the Foundation Structure

Abstract

Some foundation structures can be loaded with horizontal stress, for example pre-stressed foundation structures or structures on undermining areas. Then it is necessary to solute their effects, because they can have very significant effect on the building. When it is spoken about the foundation structures which are loaded with horizontal stress then it is spoken about two possibilities of this loading. In the first case there are horizontal deformations in the structure and in the second case these deformations can arise in the subsoil. In both of them it can be used the method with using sliding joint to increase of shear stress between foundation structure and subsoil. Asphalt belt is often used to create this sliding joint. At the faculty of Civil Engineering some materials are tested to better knowledge of asphalt belts properties and to more precise design and calculation of sliding joint.

Numerical Solution of Prestressed Foundation - Subsoil Interaction Using FEM

“…It is very convenient to design the prestressed foundation structures for undermined territories, as the prestress and the slip strip can be combined, eliminating thus efficiently adverse tensile stress in the reinforced concrete section, see [22], [23], [24], [25]. Measurements within the existing prestressed structures of the foundation under the rack hall in Ostrava [6] have showed that the slip strip was efficient, as 80% of longitudinal displacements occurred within the slip strip.…”

“…Displacement and friction between the plate and subsoil causes tensile stress, decreasing the pressure stress, caused by the prestress, towards the middle of the foundation. To solve the task, it is possible to use a similar phenomenon that occurs in structures erected on undermined territories, see [22], [23], [24], [25] and [26] for instance.…”

Numerical Modeling of the Interaction of Subsoil and Reinforced Concrete Slab

“…from the point of view of concrete mixture, reinforcement, slab dimensions and its thickness or size of the load area. Process, results and conclusions of the performed loading tests are described in [6,7,8].…”

Application of an Inhomogeneous Halfspace for the Solution of Foundation-Subsoil Interaction based on the Finite Element Method

“…Currently the experimental measurements of stress and strain of foundation structures in connection with the subsoil-structure interaction are also conducted at the Department of Structures, Faculty of Civil Engineering, VSB -TU Ostrava. Other fields of research are focused on the use of sliding joints to eliminate friction between the foundation and subsoil [10,11] and prestressing of foundation structures [12] (the numerical solution). At the Faculty of Civil Engineering, an unique test equipment was constructed in order to measure the shear resistance of the sample from asphalt belts.…”

“…During testing of the asphalt belts the shear resistance of the sample depending on the temperature is measured in a climatic chamber. The process, results and conclusions of tests are described in detail in [10,13]. In 2010, the construction of test equipment called Stand was performed at the Faculty of Civil Engineering [14].…”