摘要
为研究温度或地震荷载作用下H形钢桩基的受力性能,分别开展了平衡与非平衡土压力状态下H形钢桩基土相互作用拟静力试验研究,对比分析了整体桥H形钢桩基桩侧土抗力、桩身应变和弯矩等.结果表明,不平衡土压力会对正向加载下的桩基受力性能产生显著影响,但对负向加载下的影响不大.桥台H形钢桩(AHP)试件和台后不平衡土压力下H形钢桩(UHP)试件正向加载时的桩侧土抗力、桩身应变和弯矩显著大于负向加载,而平衡土压力状态下的H形钢桩(HP)试件正向与负向加载时的桩侧土抗力、桩身应变和弯矩基本一致.AHP试件的桩侧土抗力、桩身应变和弯矩最大,UHP试件次之,HP试件最小,故AHP试件更快进入弹塑性状态.
To study on the mechanical behaviors of steel H-pile of integral abutment jointless bridges(IAJBs)at the ambient temperature or on earthquake,reciprocating low-cycle pseudo-static tests on soil-steel H-pile interaction were carried out under balanced and unbalanced earth pressure,respectively.The soil resistance,the strain and the bending moment of the steel H-piles were comparatively analyzed.The results indicate that the unbalanced soil pressure has a significant influence on the mechanical behavior of the pile foundation under positive loadings,but a less influence under negative loadings.The soil resistance,the strain and the bending moment of the piles for abutment-steel H-pile(AHP)specimen and the steel H-pile with the unbalanced earth pressure of backfill behind abutment(UHP)under positive loadings are larger than those under negative loadings.However,the soil resistance,the strain and the bending moment of the piles for steel H-pile considering the balanced earth pressure(HP)are basically the same under positive and negative loadings.The soil resistance,the strain and the bending moment of the piles for AHP specimen are largest,followed by those of the UHP specimen,and those of the HP specimen are minimum.Therefore,AHP specimen enter the elastic-plastic state fastest.
作者
黄福云
单玉麟
薛俊青
陈宝春
陈伟
Huang Fuyun;Shan Yulin;Xue Junqing;Chen Baochun;Chen Wei(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Fujian Provincial Key Laboratory on Multi-disasters Prevention and Mitigation in Civil Engineering,Fuzhou University,Fuzhou 350108,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第6期949-957,共9页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51508103,51578161)
福州市科技计划资助项目(G50011504).
关键词
整体桥
拟静力试验
不平衡土压力
结构土相互作用
受力性能
integral abutment jointless bridges(IAJBs)
pseudo-static low cycle test
unbalanced earth pressure
soil-structure interaction
mechanical behavior
