An Analytical Solution for Joint of Prestressed and Precast Concrete Segmental Lining

Abstract

Based on the literatures and the existent researches, the study on segment joint of prestressed concrete lining has been carried out. The analytical solution for calculating the rotational angle of the joint are deduced with the calculation assumption. So the rotating stiffness of joint is obtained. Compared with the experimental results, the numerical calculation suggests that the theoretical equations are reliable. Study shows the slip length of prestressing steel strand near the joint is one key to calculate the rotational angle and rotating stiffness of joint. The matched curve of the slip length with joint bending moment is given in the paper, which can be described by logarithmic function. When the rotational angle of the joint is calculated, the slip length could be regarded as a constant to simplify the calculation.

Shear Stiffness of Segmental Joints in Cantilever Casting Concrete Bridges

“…Thus, deflection caused by shear stiffness reduction of segmental joist should be considered into the design of bridges. Though some scholars have studied shear strength of precast segmental joints [1,2,3] or tensile strength of cast-in-place joints [4,5], there is relatively little information available on the shear stiffness and design of joints between segments in cantilever casting bridges, some are confined to theory analysis [6]. In this paper, systematic experimental work was conducted to study the shear stiffness of segmental joints, and measures are proposed for shear-key design and shear stiffness improvement of joints section according to the results of experiment.…”

3-D Numerical Analysis on Performance of Prestressed and Precast Concrete Segment Joint

“…To the common bolt connection reinforced concrete segments lining, the calculating parameter be obtained by theoretical analysis, model test, numerical analysis, etc [6,7]. To the P&PC segment joint, the model test have been carried out in China and Japan [4,5], and the analytical solution have been carried out by Fengjun Liu, ET a1 [3,9,10].…”