A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System
The bearing capacity evaluation of bridge substructures is difficult as the static loading test (SLT) cannot be employed for the bridges in services. As a type of dynamic nondestructive test technique, the dynamic transient response method (TRM) could be employed to estimate the vertical bearing cap...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/9430248 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832554018472198144 |
|---|---|
| author | Jianlei Liu Meng Ma |
| author_facet | Jianlei Liu Meng Ma |
| author_sort | Jianlei Liu |
| collection | DOAJ |
| description | The bearing capacity evaluation of bridge substructures is difficult as the static loading test (SLT) cannot be employed for the bridges in services. As a type of dynamic nondestructive test technique, the dynamic transient response method (TRM) could be employed to estimate the vertical bearing capacity when the relationship between static stiffness and dynamic stiffness is known. The TRM is usually employed to evaluate single piles. For the pier-cap-pile system, its applicability should be investigated. In the present study, a novel full-scale experimental study, including both TRM test and SLT, was performed on an abandoned bridge pier with grouped pile foundation. The test included three steps: firstly, testing the intact pier-cap-pile system; then, cutting off the pier and testing the cap-pile system; finally, cutting off the cap and testing the single pile. The TRM test was repeatedly performed in the above three steps, whereas the SLT was only performed on the cap-pile system. Based on the experimental results, the ratio of dynamic and static stiffness of the cap-pile system was obtained. The results show that (1) in the low-frequency range (between 10 and 30 Hz in this study), the dynamic stiffness of the whole system is approximately four times of that of a single pile; (2) the ratio of dynamic and static stiffness of the cap-pile system tested in the study is approximately 1.74, which was similar to other tested values of a single pile; (3) to evaluate the capacity of similar cap-pile system and with similar soil layer conditions by TRM, the value of Kd/Ks tested in the study can be used as a reference. |
| format | Article |
| id | doaj-art-71cb7bb4af59447b90749282116b8880 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-71cb7bb4af59447b90749282116b88802025-02-03T05:52:32ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/94302489430248A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile SystemJianlei Liu0Meng Ma1Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaThe bearing capacity evaluation of bridge substructures is difficult as the static loading test (SLT) cannot be employed for the bridges in services. As a type of dynamic nondestructive test technique, the dynamic transient response method (TRM) could be employed to estimate the vertical bearing capacity when the relationship between static stiffness and dynamic stiffness is known. The TRM is usually employed to evaluate single piles. For the pier-cap-pile system, its applicability should be investigated. In the present study, a novel full-scale experimental study, including both TRM test and SLT, was performed on an abandoned bridge pier with grouped pile foundation. The test included three steps: firstly, testing the intact pier-cap-pile system; then, cutting off the pier and testing the cap-pile system; finally, cutting off the cap and testing the single pile. The TRM test was repeatedly performed in the above three steps, whereas the SLT was only performed on the cap-pile system. Based on the experimental results, the ratio of dynamic and static stiffness of the cap-pile system was obtained. The results show that (1) in the low-frequency range (between 10 and 30 Hz in this study), the dynamic stiffness of the whole system is approximately four times of that of a single pile; (2) the ratio of dynamic and static stiffness of the cap-pile system tested in the study is approximately 1.74, which was similar to other tested values of a single pile; (3) to evaluate the capacity of similar cap-pile system and with similar soil layer conditions by TRM, the value of Kd/Ks tested in the study can be used as a reference.http://dx.doi.org/10.1155/2020/9430248 |
| spellingShingle | Jianlei Liu Meng Ma A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System Advances in Civil Engineering |
| title | A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System |
| title_full | A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System |
| title_fullStr | A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System |
| title_full_unstemmed | A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System |
| title_short | A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System |
| title_sort | full scale experimental study of the vertical dynamic and static behavior of the pier cap pile system |
| url | http://dx.doi.org/10.1155/2020/9430248 |
| work_keys_str_mv | AT jianleiliu afullscaleexperimentalstudyoftheverticaldynamicandstaticbehaviorofthepiercappilesystem AT mengma afullscaleexperimentalstudyoftheverticaldynamicandstaticbehaviorofthepiercappilesystem AT jianleiliu fullscaleexperimentalstudyoftheverticaldynamicandstaticbehaviorofthepiercappilesystem AT mengma fullscaleexperimentalstudyoftheverticaldynamicandstaticbehaviorofthepiercappilesystem |