A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Simplified dynamic calculation model and shaking table test verification of thermal anchor pipe-permafrost system
Abstract To study the seismic response of permafrost slopes supported by the thermal anchor pipe during different freeze-thaw periods, the simplified dynamic calculation model of the thermal anchor pipe permafrost system is established, considering the characteristics of freeze-thaw stratification of permafrost, the additional mass effect of the thawed soil layer, the fluid-solid interaction between the cooling liquid and pipe wall, as well as the interaction between the anchorage section and the frozen soil. The results indicate that seasonal differences in both the amplitude and waveform of the axial force response of the thermal anchor pipe during different freeze-thaw periods. The dynamic axial force increment in thawing period is greater than that in freezing period, but the total axial force is greater in freezing period, and it should be designed to prevent it from generating excessive anchor tension and breaking under the combined action of frost heaven and earthquake. Additionally, the axial force response of the adiabatic section and evaporator section is greater than that of the anchoring section. The proposed theoretical model for thermal anchor pipe is reasonable and the results can provide useful guidance for the seismic design of the new structure.
Highlights Dynamic calculation model of the thermal anchor pipe-permafrost system was developed. Theoretical model was validated by shaking table tests. Dynamic axial force increment in thawing period is larger than that in freezing period. Total axial force under the combined action of earthquakes and frost heaving is greater.
Simplified dynamic calculation model and shaking table test verification of thermal anchor pipe-permafrost system
Abstract To study the seismic response of permafrost slopes supported by the thermal anchor pipe during different freeze-thaw periods, the simplified dynamic calculation model of the thermal anchor pipe permafrost system is established, considering the characteristics of freeze-thaw stratification of permafrost, the additional mass effect of the thawed soil layer, the fluid-solid interaction between the cooling liquid and pipe wall, as well as the interaction between the anchorage section and the frozen soil. The results indicate that seasonal differences in both the amplitude and waveform of the axial force response of the thermal anchor pipe during different freeze-thaw periods. The dynamic axial force increment in thawing period is greater than that in freezing period, but the total axial force is greater in freezing period, and it should be designed to prevent it from generating excessive anchor tension and breaking under the combined action of frost heaven and earthquake. Additionally, the axial force response of the adiabatic section and evaporator section is greater than that of the anchoring section. The proposed theoretical model for thermal anchor pipe is reasonable and the results can provide useful guidance for the seismic design of the new structure.
Highlights Dynamic calculation model of the thermal anchor pipe-permafrost system was developed. Theoretical model was validated by shaking table tests. Dynamic axial force increment in thawing period is larger than that in freezing period. Total axial force under the combined action of earthquakes and frost heaving is greater.
Simplified dynamic calculation model and shaking table test verification of thermal anchor pipe-permafrost system
Wu, Xiaolei (author) / Dong, Jianhua (author) / He, Pengfei (author) / Su, Shilin (author) / Wang, Lu (author)
2024-04-07
Article (Journal)
Electronic Resource
English
Shaking table model test on dynamic soil-structure interaction system
| British Library Conference Proceedings | 2001