装配式水泥路面夹环连接式传力杆接缝设计及验证

面向可拆卸装配式水泥路面,提出了一种夹环连接式传力杆接缝,在阐述其特征和基本参数的基础上,选取挠度传荷系数和弯沉差作为指标,使用有限元方法分析了下开口槽、传力杆、夹环构件等参数对夹环连接式传力杆接缝传荷能力的影响,同时分析了夹环连接式传力杆接缝的构件及界面应力的变化规律,得到了合理的接缝参数;此外,通过室内足尺试验评价了夹环连接式传力杆接缝的传荷性能。结果表明,提出的夹环连接式传力杆接缝的传荷能力满足要求,具有一定的工程应用价值。

Design and Verification of Precast Cement Concrete Pavement Joint with Clamping Ring Connected Dowel Bar

For detachable precast cement concrete pavement, a joint with clamping ring connected dowel bar is proposed. Based on expounding its structural characteristics and basic parameters, the deflection load transfer coefficient and deflection difference are selected as indexes, and the finite element method is used to analyze the influence of the parameters of the lower opening groove, the transmission rod, and the clamping ring on the load transfer ability of the joint with clamping ring connected dowel bar. Meanwhile, the varying regularity of the elements and the interface stress of the clamping ring connected dowel bar joint is analyzed, and reasonable structural parameters are obtained. Furthermore, the load transfer performance of the clamping ring connected dowel bar is evaluated by indoor full-scale test. The results show that the load transfer capacity of the proposed joint with clamping ring connected dowel bar meets the requirements, which has certain engineering practical value.