部分结合作用对钢-混组合梁受力性能影响分析

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中图分类号：U443.32 文献标志码：A DOI： 10.15935/j.cnki.jggcs.202503.0016

AbstractPartial shear connection in steel-concrete composite continuous bridges means maintaining ful steel-concrete composite connection in the positive moment regions，while reducing the connection in the negative moment regions to suppress the cracking development.This can be achieved by wrapping low modulus materials on stud connectors or increasing the studs spacing.So far，there is few research comparing the effectiveness of these two partial shear connection methods.This study designed and fabricated four girder specimens （a conventional composite girder，a prestressed composite girder，a partially shear connected composite girder with rubber-sleeved stud connectors，and a partially shear connected composite girder with increased stud spacing in the negative moment regions）.The shear performance of the partially connected composite girders was tested through static loading experiments，and the efects of the two partial connection methods on the mechanical performance of the stel-concrete composite girders were compared.The test results indicated that the steel-concrete composite girder with rubber-sleeved stud connectors has a bending capacity and stiffness reduced by 17% and 12% ，respectively，compared to the standard composite girder.While partial shear connection reduces the bending capacity and overall stiffness of the composite girder，it significantly prevents cracking in the concrete deck in the negative moment regions.Therefore，employing partial shear connection can efectively enhance the mechanical performance of composite girders and reduce costs.

Keywordspartial shear connection，composite girder，rubber sleeve，stud，static test

0 引言

与钢结构及预应力混凝土结构相比，钢-混凝土组合结构在连续梁的正弯矩区受力更为合理。（剩余9677字）