焊钉连接件峰值滑移及剪力-滑移本构关系

发布时间：2018-05-11 17:16

本文选题：组合结构桥梁 + 焊钉连接件　；参考：《同济大学学报(自然科学版)》2014年07期

【摘要】：为了得到组合结构桥梁常用的焊钉连接件剪力-滑移本构关系,进行了35个焊钉连接件抗剪性能模型试验.比较分析了焊钉直径、高度、极限抗拉强度和混凝土抗压强度对焊钉峰值滑移的影响,提出了焊钉峰值滑移计算式及考虑其影响的剪力-滑移本构关系式.研究结果表明,峰值滑移随焊钉直径、高度和极限抗拉强度的增加而增大,随混凝土抗压强度的增加而减小;提出的峰值滑移计算式与fédération internationale du béton(fib)所建议公式相比,考虑因素更全面,与试验结果吻合更好.包含峰值滑移的剪力-滑移本构关系式,能够反映焊钉直径、高度、强度和混凝土抗压强度的影响,可用于考虑焊钉非线性作用的组合结构桥梁计算分析.
[Abstract]:In order to obtain the shear-slip constitutive relation of welded nail connectors commonly used in composite structure bridges, the shear resistance model tests of 35 welded nail connectors were carried out. The effects of the diameter, height, ultimate tensile strength and compressive strength of the welded nail on the peak slip of the welded nail are compared and analyzed. The formula for calculating the peak slip of the welded nail and the shear slip constitutive relation considering its influence are put forward. The results show that the peak slip increases with the increase of the diameter, height and ultimate tensile strength of the welded nail, and decreases with the increase of the compressive strength of concrete, and the proposed formula is compared with the formula suggested by f 茅 d 茅 ration internationale du b 茅 fibrous. The factors considered are more comprehensive and the results are in better agreement with the test results. The shear-slip constitutive relation including peak slip can reflect the influence of the diameter, height, strength and compressive strength of welded nail. It can be used to calculate and analyze composite structure bridge considering the nonlinear effect of welded nail.
【作者单位】：同济大学土木工程学院;
【基金】：交通运输部西部交通建设科技项目(2013 318 822 370)
【分类号】：U441

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