Performance study for reinforced concrete bridge piers considering seismic capacity and demand | |
| Author | Sasithorn Thammarak |
| Call Number | AIT Thesis no.ST-11-09 |
| Subject(s) | Reinforced concrete construction--Earthquake effects Bridges, Concrete--Earthquake effects |
| 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-11-09 |
| Abstract | Most reinforced concrete bridges in Thailand are constructed with minimal seismic design consideration. Therefore the existing bridges should be evaluated whether they are able to withstand future earthquakes. ATC-40 Capacity Spectrum Method (CSM) is employed to serve this purpose, which has been known to be reliable for I st mode dominant seismic response. To estimate the structural capacity as a part of CSM, a pushover analysis of the structure using triangular lateral loading is needed. Two CSM applications are presented. The first one is to investigate the advantage of using hollow sections for bridge piers to save materials. It is concluded that the hollow sections perform better in earthquakes than common solid sections in both ductility and strength. Another application is to study the seismic response of a set of double-deck bridge piers considering uniform and non-uniform stiffness cases. Different responses for structures located in two soil sites (rock and soft soils), and subjected to different load patterns (triangular for 1st mode shape and uniform for other higher modes), are investigated. Results show that the responses of certain double-deck piers may not be dominated by the first mode due to configuration and site condition. Moreover, the conventional CSM method may cause an underestimation of the base shear; even though it can still predicts the peak displacement with good accuracy. |
| Keyword | reinforced concrete; bridge pier; CSM; ATC-40; hollow section; double-deck pier; higher mode effect |
| Year | 2011 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-11-09 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Wang, Ching-Jong |
| Examination Committee(s) | Punchet Thammarak; Park, Kyung-Ho; Thanakom Pheeraphan |
| Scholarship Donor(s) | RTG fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2011 |