The effect of soft soil layers on the local dynamic response of floating piles under harmonic lateral loading | |
| Author | Kullachai Tantayopin |
| Call Number | AIT Diss. no.GE-17-01 |
| Subject(s) | Harmonic analysis Pilling (Civil engineering) Soil stabilization Lateral loads |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering in Geotechnical and Earth Resources Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation;no. GE-17-01 |
| Abstract | Full-scale experiments of long floating piles under lateral harmonic excitation at pile head were conducted to examine local resonant effects caused by soft soil layer’s dynamic characteristic. Three concrete piles of diameter 0.35 m with different lengths; 6m, 10m, and 15m in 19-m thick soft Bangkok clay were studied. Small amplitude sweep excitations were applied in the frequency range that triggers resonance of top soft soil layer but will not reach to the first fundamental frequency of pile-soil system. The experiments show that the top soft soil layer produced local peaks of pile response at frequencies associated with predominant frequencies of soil layer which agree well with the previous study of dynamic characteristic of soil layer in Bangkok basin area by microtremor measurement. The comparison with numerical solutions, i.e. the Reduced-Dimension FEM (RDFEM) and Winkler’s Beam on Spring and Dashpot Foundation (WBSDF), to evaluate the ability in simulation of local resonance effects was carried out. Dynamic moduli of soil at different depths, to be used in numerical simulations, were measured by cross-hole seismic test. Satisfactory matches between experimental results and numerical simulations by RDFEM were observed whereas WBSDF’s predictions are not close since the soft soil layer cannot be incorporated in WBSDF. |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation;no. GE-17-01 |
| Type | Dissertation |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phien-wej; |
| Examination Committee(s) | Punchet Thammarak ;Pennung Wanitchai ;Suttisak Sorralump; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (Ph.D) - Asian Institute of Technology, 2017 |