|
|
|
| THEORETICAL AND EXPERIMENTAL STUDY ON STRESS INCREMENT OF EXTERNAL TENDONS IN EXTERNAL PRESTRESSED CONCRETE FLEXURAL MEMBERS AT ULTIMATE STATE |
| ZHANG Zhong-xian, ZHANG Yao-ting |
| School of Civil Engineering & Mechanics, HUST |
|
|
|
|
Abstract Basing on the research of seven external prestressed beams, in this paper we analyzed the external tendons of external prestressed beam and studied the whole of the beam deformation, and we deduced a formula with members deflection and end rotation of beam as parameters of external tendons stress under the ultimate state, the calculation formula is relatively simple, combine with this text experiment result combination domestic and international relevant experiment research proceeds the contrast with the calculation value of the deduced theoretical formula, result enunciation; Calculation result agree with the experiment result very well, for this reason this kind of calculation method is simple and viable.
|
|
Received: 21 July 2003
|
|
|
|
|
|
[1]周履.无粘结力筋与体外筋预应力混凝上桥梁的发展历程与现状[J].桥梁建设,1997(3):1-11.
[2]李晨光,刘航.体外预应力技术在工程加固改造中的应用[J].施工技术,1999,6,28(2):30-32.
[3]牛斌.体外预应力混凝上梁弯曲性能分析[J].土木工程学报,1999,32(4):37-44.
[4]Dall' Asta A. and Dezi I. Nonlinear analysis of beams prestressed by unbounded cables. J. of structural Engineering, ASCE[J].1993,119(4):730-732.
[5] Harajli M. Khairallah N and Nassif H. Externally prestreed members: evaluation of second-order effects.J. of Strctural Engineering[J].1999,125(10):1151-1161.
[6]Alkhairi F.M. and Naaman A.E. Analysis of beam prestressed with unbounded in internal or external Tendons. J. of Structural Engineering [J].ASCE. 1993, 119(9):2680-2700.
[7]巢斯,孙海等.体外预应力梁受力性能[J].四川建筑科学研究,2000(1):60-62.
[8] Angel C. Aparicio, Uonzalo Ramos, Juan R. Casas. Testing of externally prestressed concrete beams, Engineering Structures[J].2002(24):73-84.
[9] Basile U. Kabbat, Koz Sowlat. Testing of segmental concrete Girders with External Tendons. PCI Journal [J]. March-April 1987:87-107.
[10]Mohamed H. Harajli. Strengthening of concrete Beams by External prestressing PCI Journal November-December,1993.76-88.
[11]杜进行,刘西拉.体外及无粘结预应力筋极限应力研究进展[J].公路交通科技, 2000,17(6):41-43.
[12]王有志等.预应力混凝上结构[M].北京:中国水利水电出版社,1998.
[13] Harajli, M. H. and Kanj, M. Y. Ultimate flexural strength of concrete members prestressed with unbounded tendons. ACI structural Journal[J].1991,88(6):13-22.
[14]Kiang-Hwee Tan, Chee-khoon Ng, Effects of Deviators and Tenden Configuration on Behavior of Externally prestressed beans. ACI structural Journal[J]. February1997:13-22.
|
|
|
|
2003, Vol. 20 
