Prestressing force

Lecture "Prestressed concrete: Section 5 - Analysis of continuous spans" provide students with knowledge about: calculate applied loading; determine beam section properties and materials; calculate balanced forces in each span; calculate net load on beam;... Please refer to the documentation for more details.

41p phuong3129 07-06-2023 9 3   Download

To achieve the objective, first, a post-tensioning anchorage system is equipped with arrays of ESGs (electrical strain gages) for measuring strain responses. The anchorage system is installed on the stressing system, which is used to resist prestress force from the anchorage. Second, strain responses of ESGs arrays are measured under series prestress loss cases. Third, strain variations are utilized to determine stress components sensitive to prestress force loss. Last, empirical equations for prestress loss estimation is proposed based on experimental strain data.

5p visherylsandber 04-07-2022 10 2   Download

This paper presents an experimental study on the effect of prestressing force on the flexural behavior of unbonded prestressed concrete (UPC) strengthened by Carbon fiber reinforced polymer (CFRP) sheets. The testing program was carried out on nine large-scale UPC rectangular beams. The investigated parameters included the reduction of prestressing force (0%, 15%, and 30%) and the number of CFRP layers (0, 2, and 4 layers).

18p haoasakura 30-05-2022 8 1   Download

In this paper, a computing method for the tendon slip based on the force equilibrium condition at deviators was proposed. The proposed method for the evaluation of tendon slip was presented in a general form by taking into account all possibilities of tendon slip at deviators, and several factors found to be important that affect the tendon slip, such as effects of the slippage at two adjacent deviators, friction, change of tendon angles during the applied load, etc.

12p thienthanquydu 21-10-2018 22 1   Download

Using the developed element, the natural frequencies of beams having various boundary conditions are computed for different values of the axial force and foundation stiffness. The influence of the axial force and the foundation stiffness on the frequency of the beams is investigated. The effect of partial support by the foundation and the type of mass matrices on the vibration frequency of the beam is also studied and highlighted.

11p thienthanquydu 21-10-2018 28 0   Download

This paper presents a finite element formulation for investigating the free vibration of uniform Timoshenko beams resting on a Vinkler-type elastic foundation and prestressing by axial force.

12p thienthanquydu 21-10-2018 33 0   Download