EXPERIMENT AND STRENGTHEN CONFIGURATION ON CORRUGATED STEEL-WEB-NOSE GIRDER UNDER LOCAL COMPRESSION

While directly using the corrugated steel-web beam of a composite girder as an incremental launching nose girder, the bearing capacity of a steel beam under local pressure is weak, and there is a gap between a steel beam and bridge supports. So strengthening configurations to improve the local bearing performance of a corrugated steel-web guide-beam is proposed. In order to further analyze the stress characteristics of corrugated steel-web guide-beam under local compression, 3 groups of scale model test were designed and tested to measure the failure model and ultimate bearing capacity of the guide-beam with different strengthening structures. The results show that all failure modes of the specimens are local buckling of corrugated web within the bearing rage and steel boots significantly improve the local bearing performance of corrugated web guide-beam as well as structural ductility. Box type boot functions better than I-shape boot, and they respectively increase the ultimate bearing capacity of a guide beam by 58% and 12%.