期刊论文

Li, J.(jixiangli@whpu.edu.cn)

中文

建筑结构学报

1000-6869

2009

30

2

149-157

10.3321/j.issn:1000-6869.2009.02.019

基金项目：湖北省自然科学基金项目（2004ABA030）,武汉市科技攻关计划项目（200810321150）.

本校为第一且通讯机构

为了研究钢纤维混凝土六桩双柱厚承台受力模型和传力机理,对6个试件进行静力加载试验和非线性有限元分析,探讨了钢纤维混凝土六桩双柱厚承台开裂荷载、极限荷载、裂缝开展、承台内部应变分布、钢筋应力分布等力学性能.结果表明:钢纤维的掺入能有效提高混凝土承台的开裂荷载和极限荷载,延缓承台的开裂,阻裂效果明显;钢纤维混凝土双柱六桩厚承台破坏形态为冲切破坏,其传力模型符合空间拉压杆模型.提出了基于拉压杆模型的承载力设计计算公式,其计算值与试验值吻合较好;最后给出基于拉压杆模型的双柱承台的设计建议,便于实际工程中应用.

In order to study the mechanics model and load-transferring pattern, 6 specimens were tested by static loading and analyzed by nonlinear finite element method. The mechanical behavior such as cracking load, limit load, distribution of strain inside caps and stress of the bars for steel fiber reinforced concrete (SFRC) double-column combined with six-pile caps (DCPC) are discussed. The results indicate that steel fiber could increase the cracking load and limit load for reinforced concrete caps, as the cracking and further growth cracks. The failure mode of SFRC double-column combined with six-...