Experimental investigation into high strength Q690 steel welded H-sections under combined compression and bending

摘要

This paper presents a systematic experimental investigation into high strength Q690 steel welded H-sections under combined compression and bending. A total of 8 slender columns with four sections of different cross-sectional dimensions were tested successfully under eccentric loads. All columns failed in overall buckling about the minor axes of their cross-sections with significant material yielding. In some cases, plastic local plate buckling in the flange outstands became apparent at failure. After tests, all the columns were inspected closely, and no fracture in welding was found. As expected, these high strength Q690 steel welded H-sections were demonstrated to behave in various ways similar to those of conventional strength steel welded H-sections. Hence, these tests may be regarded to be confirmatory tests to structural behavior of Q690 steel welded H-sections under combined compression and bending.