Ultra high performance hybrid segmental girders have the characteristics of relatively light structural weight,fast construction speed and low maintenance cost,which are nowadays applied in many bridge projects.The shear key in the joints of segmental girder bridge is an important part of the section bearing shear force,which is the key research object of scholars at home and abroad.It relies on the Zhongkai Expressway project on ultra-high-performance mix without web prestressing combination of segmental girder joints foot straight shear test,analysis and study of the damage modes of the test beams,and the establishment of finite element model for further analysis.The results show that it is feasible to set up the shear keys with sparse teeth,and the shear bearing capacity of the joints is mainly borne by the upper shear keys,the contact surface of the joints and the prestressing tendons.Moreover,the finite element model can better reflect the mechanical properties of the test beam.
关键词
无腹筋/预应力/节段梁/足尺试验/直剪试验/超高性能混凝土
Key words
no web reinforcement/prestressed/segmental girders/footprint test/straight shear test/ultra high performance concrete
维普
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