The Research on the Seismic Performance of Immersion Joints Under Cyclic Loading
Underground traffic structures can ease the traffic pressure on ground traffic and alleviate the effect of urban heat wave. The structural failure of underground structures caused by earthquakes is one of the crucial hazards in the field of urban underground transportation engineering. The structura...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/vib/5153570 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Underground traffic structures can ease the traffic pressure on ground traffic and alleviate the effect of urban heat wave. The structural failure of underground structures caused by earthquakes is one of the crucial hazards in the field of urban underground transportation engineering. The structural safety is an important symbol of urban sustainability and resilience. To investigate the failure modes and mechanical performances of immersion joints under the effects of spatially varying seismic ground motions, an eccentric cyclic loading method has been proposed in the study. For comparison, both the conventional centric cyclic loading condition and novel eccentric cyclic loading condition have been considered in the research. Based on the numerical results, the failure modes, load-carrying properties, ductility, stiffness, and energy dissipation characteristics of the immersion joint have been synthetically analyzed. The results show that the loading conditions have obvious influence on the internal force evolution mechanism of the immersion joint. Under eccentric cyclic loading, the plastic damages occur at the horizontal shear keys, vertical shear keys, and even the left side wall of the tunnel element. As a result of comparison, the ductility coefficient value of the immersion joint under eccentric cyclic loading in the negative direction is 12.4% smaller than that under centric cyclic loading. The immersion joint exposed to eccentric cyclic loading exhibits worse aseismic performance than that under centric cyclic loading. |
|---|---|
| ISSN: | 1875-9203 |