| contributor author | Amir Gilani | |
| contributor author | Andrew Whittaker | |
| date accessioned | 2017-05-08T20:57:37Z | |
| date available | 2017-05-08T20:57:37Z | |
| date copyright | March 2000 | |
| date issued | 2000 | |
| identifier other | %28asce%290733-9445%282000%29126%3A3%28331%29.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/33361 | |
| description abstract | Changeable message signs (CMS) are supported by cantilevered, inverted L-shaped structural components composed of a vertical post and a horizontal mast arm. The high-cycle fatigue failure of one CMS structure in southern California led to a detailed analytical and experimental study of components of CMS structures. This paper reports the results of the experimental studies and presents recommendations for future CMS construction. A companion paper documents the results of the field studies and finite-element analysis of components of CMS structures. Six cantilever specimens were tested to failure: one as-built post (AB1); two retrofitted posts (GR1 and CIP1); and three mast arms (MA1, MA2, and MA3). The specimens were tested at a stress range of 69+ MPa (10+ ksi). The fatigue life of all six specimens exceeded the AASHTO design fatigue life of 400,000 cycles for a stress range of 69 MPa. Alternate construction details; improved welding, fabrication, and quality assurance/quality control practices; additional field and wind-tunnel testing; and further laboratory experimentation are recommended. | |
| publisher | American Society of Civil Engineers | |
| title | Fatigue-Life Evaluation of Steel Post Structures. II: Experimentation | |
| type | Journal Paper | |
| journal volume | 126 | |
| journal issue | 3 | |
| journal title | Journal of Structural Engineering | |
| identifier doi | 10.1061/(ASCE)0733-9445(2000)126:3(331) | |
| tree | Journal of Structural Engineering:;2000:;Volume ( 126 ):;issue: 003 | |
| contenttype | Fulltext | |