SHEAR BEHAVIOR OF JOINTS IN PRECAST UHPC SEGMENTS BRIDGES
The structural behavior of precast concrete segmental bridges largely depends on the behavior of the joints between segments.To study the shear strength and behaviour of the joints in UHPC-PSB, tests and FE analysis were conducted.Ten specimens were tested under static shear loading conditions to investigate the limit states of UHPC keyed joints.The parameters included fiat and keyed joints, with epoxy and without, the level of prestressing.Numerical models were also developed to predict the shear capacity of shear keys with various values of normal pressure.The ultimate shear strength of keyed joint depends on the concrete compressive strength.However, it is not proportional to concrete compressive strength.An increase of normal pressure increases the shear capacity of the joint with the rate of frictional coefficient and contact surfaces.A modified design model has been proposed where the effects of concrete compressive strength have been taken into account.The shear bearing capacity of the proposed model has provided better accuracy in comparison with the existing formulas for segmental bridges.
Ultra-high-performance concrete(UHPC) Precast segmental joint shear key Shear behavior FE model
Shuaifei Xuan Hui Zheng Xuejiao Liang
School of Civil Engineering, Hunan University of Technology, Zhuzhou, China
国际会议
福州
英文
693-700
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）