Repository: DepositOnce – institutional repository for research data and publications of TU Berlin https://depositonce.tu-berlin.de
TY - THES
AU - Saidel, Tudor
PY - 2020
TI - Passive earth pressure under shock-type loads
T2 - Technische Universität Berlin
DO - 10.14279/depositonce-10478
UR - http://dx.doi.org/10.14279/depositonce-10478
PB - Technische Universität Berlin
M3 - Doctoral Thesis
CY - Berlin
LA - en
AB - Knowing the passive earth resistance under shock-type loads is extremely important to assure that the ultimate and serviceability limit states are not exceeded in the case of accidental actions due to collision of vehicles with structures. Previous papers that provide a calculation model validated by tests are not known. The research started with the static passive earth resistance mobilization in order to develop and validate a mathematical model, which was later extended for the dynamic case, by adding the inertial forces. The model was transposed in a calculation program and was validated on small scale physical models.
The applicability of the model can be extended to any type of vertical plane structures, which are in contact with the retained soil, and for which a horizontal displacement is expected, and which can be assimilated by a plane strain state. As an alternative, the physical tests were also analyzed by the finite element method, using the PLAXIS 2D software. The results obtained for the dynamic case offer a safe approximation and they are presented within the paper.
Finally, several selected practical examples of applying the mathematical model developed by the author are presented. The examples consist of passive earth pressure calculations, in case several common transportation vehicles collide with retaining walls. Furthermore, a simplified preliminary analysis is recommended as exemplified in chapter 6.8, in order to identify the design cases in which the dynamic response may lead to the system’s loss of stability.
As a main result of the research, for practical cases the design engineer may use the values of the ultimate static passive displacement and resistance given by any standard, literature reference or model as input in the mathematical model developed by the author in order to calculate the horizontal parallel displacement of a planar full-scale structure subjected to any shock-type load. For a simplified preliminary approach, the use of the charts represented in the figures 6-24 and 6-25 is recommended. For more complex cases or need for accurate results in special cases, further research is required as outlined in the proposed development possibilities.
KW - passive resistance
KW - shock-type load
KW - dynamic displacement
KW - dynamic stability
KW - example
KW - Erdwiderstand
KW - Stoßbelastung
KW - dynamische Verschiebung
KW - dynamische Stabilität
KW - Beispiel
ER -