吉林大学学报(工学版) ›› 2026, Vol. 56 ›› Issue (1): 209-218.doi: 10.13229/j.cnki.jdxbgxb.20240607
Hao ZHANG1(
),Yi-yan CHEN1,Jun-yu YE1,Ju-can DONG2,Qiu ZHAO1(
)
摘要:
本文设计并开展了3根超大跨波形钢腹板组合箱梁弯扭耦合试验,得到了试验梁的破坏模式、扭矩-扭率曲线、弯矩-位移曲线以及应变分布规律等。然后,基于已验证有限元法进行参数化分析,根据超大跨波形钢腹板组合箱梁的破坏模式,提出了弯扭耦合关系曲线以及简化承载力计算方法。结果表明:在弯扭耦合作用下组合箱梁的破坏形式可分为弯型破坏和扭型破坏,分别以混凝土顶板被压碎和混凝土底板剥落为标志;弯型破坏时腹板的整体屈曲现象主要集中在弯剪扭段,而扭转破坏时腹板的整体屈曲现象主要集中在弯扭段;在一定范围内,弯矩的存在使组合箱梁的抗扭强度得到加强;建立的弯扭耦合关系曲线和简化承载力计算方法均具有较高精度,最大误差不超过6%。
中图分类号:
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