Design of shear pocket connection in full-depth precast concrete deck systems
Design of shear pocket connection in full-depth precast concrete deck systems
复制标题
全深度预制混凝土桥面体系中剪力连接的设计
DOI：
10.1016/j.engstruct.2018.11.003
复制
发表时间：
2019-01
影响因子：
5.5
通讯作者：
R. Tawadrous;G. Morcous
中科院分区：
文献类型：
--
作者：
R. Tawadrous;G. Morcous
目前的桥梁设计规范没有提供足够的标准/程序来设计全深度预制混凝土桥面系统，特别是那些具有剪切口袋连接的桥面系统。相反，这些系统及其连接是根据具体情况进行设计的，要么进行必要的测试，要么采用主要为现浇混凝土甲板系统开发的设计标准/程序。使用钢空心结构截面（HSS）形成的剪切口袋连接，由于其优越的结构性能和面板制造简单，为连接预制混凝土甲板和支撑梁提供了一种很有前途的解决方案。本文的主要目的是开发设计全深度预制混凝土甲板系统中HSS形成的剪切口袋连接的标准/程序。这些程序将帮助桥梁设计者选择口袋尺寸、HSS厚度、口袋锚固和加固，以最大限度地提高连接能力，同时允许足够的施工公差。进行了实验调查（推离测试）和有限元分析（FEA）来验证开发的设计标准/程序。分析和试验结果表明，所制定的HSS成形剪切孔接头设计准则和程序是令人满意的。
Current bridge design codes do not provide adequate criteria/procedures for designing full-depth precast concrete deck systems, especially those with shear pocket connections. Instead, these systems and their connections are designed on a case-by-case basis by either conducting necessary testing or adopting the design criteria/procedures developed primarily for cast-in-place concrete deck systems. Shear pocket connections formed using steel hollow structural sections (HSS) provide a promising solution to connecting precast concrete deck panels to the supporting girders due to their superior structural performance and simplicity of panel fabrication. The main objective of this paper is to develop criteria/procedures for designing HSS formed shear pocket connections in full-depth precast concrete deck systems. These procedures will assist bridge designers in selecting pocket dimensions, HSS thickness, pocket anchorage and reinforcement necessary to maximize the connection capacity while allowing adequate construction tolerance. Experimental investigation (push-off testing) and finite element analysis (FEA) were performed to validate the developed design criteria/procedures. Analysis and testing results indicated that the developed design criteria/procedures for HSS formed shear pocket connections are satisfactory.