摘要
以"板-梁-柱"双层隧道内部预制结构体系为依托,研究了车道板之间的连接方式,包括直缝、铰缝、刚接缝及等刚度连接4种形式。结果表明,直缝传递纵向弯矩有限,铰缝和刚接缝相当。直缝纵向剪力基本不传递,铰缝和刚接缝纵向弯矩较为连续,几乎100%传递。刚接缝宽度对弯矩传递,随着宽度的增大而减小,但影响不大。从施工方便的角度,可以选择较大的接缝宽度。刚接缝厚度对弯矩传递,随着厚度的增大而减小,且刚接缝厚度等于车板厚度(等刚度连接)时,受力最连续。推荐的近等刚度连接,接头刚度大,受力合理。
Based on the internal prefabricated structural system of "slab-beam-column" double-layer tunnel, the connecting mode between lane slabs is studied including four modes of straight joint, hinge joint, rigid joint and equal rigidity joint. The results show that the longitudinal moment transmitted by the straight joint is limited, and the hinge joint is equivalent to the rigid joint. The longitudinal shearing force of straight joint is basically not transferred, and the longitudinal bending moment of hinge joint and rigid joint is relatively continuous, almost 100% transfer. The transfer of rigid joint width to bending moment decreases with the increase of the width, but has little effect. From the perspective of construction convenience, a larger joint width can be selected. The transfer of rigid joint thickness to bending moment decreases with the increase of thickness. But when the thickness of rigid joint is equal to the thickness of lane slab(equal rigidity connection), the stress is the most continuous. The near equal rigidity connection recommended in this paper has large joint stiffness and reasonable stress.
出处
《城市道桥与防洪》
2020年第7期281-284,M0026,共5页
Urban Roads Bridges & Flood Control
关键词
盾构隧道
双层预制结构
接缝形式
数值模拟
shield tunnel
double-layer prefabricated structure
joint form
numerical simulation
作者简介
王文东(1989—),男,硕士,工程师,从事隧道和桥梁工程建设技术管理工作。
