Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion Conditions
Currently, the seismic designs of reinforced concrete (RC) bridges with tall piers are often accomplished following the ductility-based seismic design method. Though the collapses of the RC bridges with tall piers can be avoided, they are likely to experience major damage and loss of functionality w...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-10-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/10/20/7377 |
| _version_ | 1797550280683814912 |
|---|---|
| author | Zhehan Cai Zhijian Wang Kaiqi Lin Ying Sun Weidong Zhuo |
| author_facet | Zhehan Cai Zhijian Wang Kaiqi Lin Ying Sun Weidong Zhuo |
| author_sort | Zhehan Cai |
| collection | DOAJ |
| description | Currently, the seismic designs of reinforced concrete (RC) bridges with tall piers are often accomplished following the ductility-based seismic design method. Though the collapses of the RC bridges with tall piers can be avoided, they are likely to experience major damage and loss of functionality when subjected to strong near-fault ground motions. The objectives of this study are to put forward an innovative design concept of a tall-pier system and its application in tall-pier bridges. The concept of the innovative tall-pier system is derived from the principle of earthquake-resilient structures, and is to improve the seismic performances of the tall-pier bridges under strong near-fault ground motions. The proposed tall-pier system has a box section and is composed of four concrete-filled steel tubular (CFST) columns and energy dissipating mild steel plates (EDMSPs). Trial design of a bridge with the new composite tall-pier system is performed based on a typical continuous rigid frame highway bridge with conventional RC box section tall piers. Both static analysis and nonlinear time history analysis of both the bridges with the new composite tall piers and conventional RC tall piers under the near-fault velocity pulse-type ground motions were conducted in Midas Civil2019 and ABAQUS. The results show that: under the design-based earthquake (DBE), the CFST columns and connecting steel beams remain elastic in the bridge with the new composite tall piers, while the damage is found in the replaceable EDMSPs which help dissipate the seismic input energy. The displacement responses of the new bridge are significantly smaller than those of the conventional bridge under DBE. It is concluded that the bridge with the new composite tall piers is seismic resilient under near-fault ground motions. |
| first_indexed | 2024-03-10T15:27:05Z |
| format | Article |
| id | doaj.art-e9da3a4175d84f41b259159cbe79d06a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T15:27:05Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-e9da3a4175d84f41b259159cbe79d06a2023-11-20T17:58:28ZengMDPI AGApplied Sciences2076-34172020-10-011020737710.3390/app10207377Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion ConditionsZhehan Cai0Zhijian Wang1Kaiqi Lin2Ying Sun3Weidong Zhuo4College of Civil Engineering, Fuzhou University, Fuzhou 350108, ChinaCollege of Civil Engineering, Fuzhou University, Fuzhou 350108, ChinaCollege of Civil Engineering, Fuzhou University, Fuzhou 350108, ChinaCollege of Civil Engineering, Fuzhou University, Fuzhou 350108, ChinaCollege of Civil Engineering, Fuzhou University, Fuzhou 350108, ChinaCurrently, the seismic designs of reinforced concrete (RC) bridges with tall piers are often accomplished following the ductility-based seismic design method. Though the collapses of the RC bridges with tall piers can be avoided, they are likely to experience major damage and loss of functionality when subjected to strong near-fault ground motions. The objectives of this study are to put forward an innovative design concept of a tall-pier system and its application in tall-pier bridges. The concept of the innovative tall-pier system is derived from the principle of earthquake-resilient structures, and is to improve the seismic performances of the tall-pier bridges under strong near-fault ground motions. The proposed tall-pier system has a box section and is composed of four concrete-filled steel tubular (CFST) columns and energy dissipating mild steel plates (EDMSPs). Trial design of a bridge with the new composite tall-pier system is performed based on a typical continuous rigid frame highway bridge with conventional RC box section tall piers. Both static analysis and nonlinear time history analysis of both the bridges with the new composite tall piers and conventional RC tall piers under the near-fault velocity pulse-type ground motions were conducted in Midas Civil2019 and ABAQUS. The results show that: under the design-based earthquake (DBE), the CFST columns and connecting steel beams remain elastic in the bridge with the new composite tall piers, while the damage is found in the replaceable EDMSPs which help dissipate the seismic input energy. The displacement responses of the new bridge are significantly smaller than those of the conventional bridge under DBE. It is concluded that the bridge with the new composite tall piers is seismic resilient under near-fault ground motions.https://www.mdpi.com/2076-3417/10/20/7377tall-pier bridgeseismic resiliencecomposite box pierenergy dissipating mild steel platereplaceable componentvelocity pulse |
| spellingShingle | Zhehan Cai Zhijian Wang Kaiqi Lin Ying Sun Weidong Zhuo Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion Conditions Applied Sciences tall-pier bridge seismic resilience composite box pier energy dissipating mild steel plate replaceable component velocity pulse |
| title | Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion Conditions |
| title_full | Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion Conditions |
| title_fullStr | Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion Conditions |
| title_full_unstemmed | Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion Conditions |
| title_short | Seismic Behavior of a Bridge with New Composite Tall Piers under Near-Fault Ground Motion Conditions |
| title_sort | seismic behavior of a bridge with new composite tall piers under near fault ground motion conditions |
| topic | tall-pier bridge seismic resilience composite box pier energy dissipating mild steel plate replaceable component velocity pulse |
| url | https://www.mdpi.com/2076-3417/10/20/7377 |
| work_keys_str_mv | AT zhehancai seismicbehaviorofabridgewithnewcompositetallpiersundernearfaultgroundmotionconditions AT zhijianwang seismicbehaviorofabridgewithnewcompositetallpiersundernearfaultgroundmotionconditions AT kaiqilin seismicbehaviorofabridgewithnewcompositetallpiersundernearfaultgroundmotionconditions AT yingsun seismicbehaviorofabridgewithnewcompositetallpiersundernearfaultgroundmotionconditions AT weidongzhuo seismicbehaviorofabridgewithnewcompositetallpiersundernearfaultgroundmotionconditions |