Seismic performance improvement of existing highway bridges by base isolation approach | |
| Author | Nat Hanwiboonwat |
| Call Number | AIT Thesis no.ST-20-18 |
| Subject(s) | Bridges--Earthquake effects Earthquake hazard analysis Rubber bearings |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-20-18 |
| Abstract | This research focuses to study on the most popular conventional designed bridge which is designed by the department of rural road of Thailand. Nowadays, there are many conventional designed bridges located in highly seismically areas such as in northern, western and southern Thailand. The conventional bridges are not designed to resist the seismic force. Therefore, the bridge might be damaged and un-functional by earthquake. After Mae Lao earthquake in 2014, many damages were found on the bridge structures such as pounding at deck-abutment joints etc. The bridges are very essential infrastructure because they connect every area together and they are used to transfer every important good to help the people from disaster. Therefore, the bridges have to be functional during and after earthquake. In this study, a existing conventional bridge is modified to isolated structure. The isolation bearings are used to instant strip rubber bearings. However, the isolation bearings may cause the greater displacement of the deck, thus the pounding effect and unseating effect may occur at the deck‟s expansion joint. Therefore, the researcher has to modify the deck-deck joints making the spans continuity and re-design the deck-abutment joints to eliminate the pounding effect between decks and abutment. SAP2000 is used to make three non-linear 3D analytical models including conventional structure analytical model to study the behaviors and earthquake damages, simple span isolated structure to study the effective of isolation bearing and the behavior of the structure, continuous span isolated bridge to finding the solution of the structure and check the modified structure before using in real structure. |
| Year | 2020 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-20-18 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai; |
| Examination Committee(s) | Punchet Thammarak;Thanakorn Pheeraphan; |
| Scholarship Donor(s) | His Majesty the King’s Scholarships (Thailand); |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2020 |