Affiliation:
1. Harbin Institute of Technology,Harbin University of Science and Technology
2. Harbin Institute of Technology
Abstract
Rational evaluation for stress increase of unbonded tendon at ultimate is the basis to exactly compute flexural load bearing capacity of unbonded prestressed concrete beams. Moment-curvature nonlinear analysis method is adopted to compile programs for calculating stress increase at ultimate in unbonded prestressed continuous beams. The precision of the method is proved by comparing results of 16 experimental two-span unbonded prestressed continuous beams to the prediction value of stress increase at ultimate. Based on the simulation analysis, law of the influence of some basic factors to stress increase at ultimate in unbonded tendons in continuous beams is obtained, such as non-prestressed reinforcement index, prestressed reinforcement index, ratio of span to depth and loading type. Then formulas for calculating stress increase at ultimate in unbonded tendons in prestressed concrete continuous beams were established.
Publisher
Trans Tech Publications, Ltd.
Reference6 articles.
1. X.K. Tao, Unbonded Prestressed Concrete Structure Design and Construction, Earthquake Publishing Company, Beijing, China, 1993(in Chinese).
2. Y. Wang, X.D. Wang, W.Z. Zheng, Journal of Building Structures. Vol. 29 (2008) 40-48 (in Chinese).
3. N.D. Ariyawardena, Design of precast prestressed concrete members using external prestressing. PCI Journal. 2002, 47(2): 84-91.
4. S. Barakat, K. Bani-Hani, Multi-objective reliability- based optimization of prestressed concrete beams. Structural Safety, 2004，26(3): 311-342.
5. A.E. Naaman, F. M, Stress at Ultimate in Unbonded Prestressing Tendons: Part1-Evalutaion of the state-of-art. ACI Structural Journal, 1991, 88(5): 683-692.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献