THE STRUCTURAL RESPONSES OF DOLOS ARMOR UNITS UNDER THE DYNAMIC LOADING

Wei-Ming Lin, Cheng Rau, Rea-Lon Su

Abstract


The "Dolos" is now used widely for harbor and shore protection works in various ports of Taiwan (R.O.C.) and some damage has been noted. The purpose of this research is to understand the major factors which influence dolos breakage. The factors studied include plain or reinforced concrete, rebar arrangement, chamfered or enlarged fillet corner and the fracture behavior by pendulum and drop test. Site observations and laboratory dynamic tests are included in this paper. The site observation investigated the behavior of the broken dolos at each habor. In the laboratory dynamic tests 42 specimens of 1.5 tons dolos were used for drop tests; frontal and transverse pendulum tests (Fig.l). The results show that the fracture behavior in the laboratory tests agree with those of site observation, i.e. cracking due to frontal impact is more severe than that of transverse impact. The arrangement of rebar also influences the strength of the dolos. Therefore, it is suggested that the dynamic tests are necessary for dolos testing.

Keywords


dynamic loading; dolos; armor; armor unites; structural response

Full Text: PDF

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.