Results 71 to 80 of about 216 (114)
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A Probabilistic Comparison of Prestress Loss Methods in Prestressed Concrete Beams
PCI Journal, 2004Camber and long-term deflections are directly linked to the loss of prestressing force, a characteristic of all prestressed concrete members. In this investigation, the effects of the inherent variability of the parameters used to estimate prestress loss was studied for two typical bridge beam cases using several prestress loss predictive methods at ...
Christopher G. Gilbertson +1 more
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Analysis of Prestressing Loss on Construction of External Prestressed Wooden Buildings
Advanced Materials Research, 2012Wooden buildings which has a long history, is one of the earliest forms of building structures by mankind.The structure form and construction method of are different from the common prestressed structure,therefore,the prestressing loss caused by the external prestressed structures is different from that of the common prestressed structure.It is an ...
Ji Mei Zhang +2 more
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Applying Prestressed CFRP Sheets to Restore Prestress Losses in Prestressed Concrete Beams
SP-245: Case Histories and Use of FRP for Prestressing Applications, 2007This paper has described how the issue of the rehabilitation of damaged structures has attracted the attention of researchers in order to resolve the undesired problems caused by increased traffic loads, corrosion, or impact damage. Appropriate methods are therefore essential for extending the lifespan of the structures and the application of carbon ...
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Loss Of Prestress In Pretensioned Prestressed Concrete Beams.
1964PhD ; Civil engineering ; University of Michigan, Horace H. Rackham School of Graduate Studies ; http://deepblue.lib.umich.edu/bitstream/2027.42/183771/2/6412657 ...
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The effect of prestress losses on the seismic response of prestressed concrete frames
Computers & Structures, 1996An analytical model for predicting the dynamic response of prestressed concrete frames was presented recently. According to this model, the effect of prestress losses on the seismic response of prestressed concrete frames is studied in this paper. The results indicate that the ductility factor and ductility demand increase with decreasing prestress ...
Mo, Y. L., Hwang, W. L.
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Refined calculation of time-dependent prestress losses in prestressed concrete girders
Structure and Infrastructure Engineering, 2020Considering the interaction between concrete shrinkage and concrete creep and between the relaxation of prestressing steel and concrete creep in the prestressed concrete member, a refined method fo...
Mingfang Yang, Jinxin Gong, Xiaoyan Yang
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Recommendations for Estimating Prestress Losses
PCI Journal, 1975This PCI Committee report summarizes data on creep and shrinkage of concrete and steel relaxation, and presents both a general and a simplified design procedure for using these data in estimating loss of prestress after any given time period. A Commentary explains the design provisions.
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Eigenfrequencies of continuous prestressed concrete bridges subjected to prestress losses
Structures, 2020Abstract The paper presents a numerical procedure to evaluate the consequences of prestress loss on the frequencies of vibration of continuous prestressed concrete (PSC) bridges. The importance of being able to identify an excessive loss of prestressing, caused for instance by the breaking of some strands, is evident considering that currently the ...
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Prestress Losses in Continuous Composite Bridges
PCI Journal, 1986D uring the last 30 years composite construction of concrete slab-on-steel girders has been widely used to form the superstructure of bridges. Generally, such construction has been applied only to simple spans or to the sagging moment regions of continuous spans since transverse cracks will inevitably develop in the region of intermediate supports ...
Mohamed H. Soliman, John B. Kennedy
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1973
Gives a producer-oriented overview of prestress losses. Contains test results and analyses, methods of reducing such losses, and a discussion of future priorities of producer-conducted investigations and input to codes.
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Gives a producer-oriented overview of prestress losses. Contains test results and analyses, methods of reducing such losses, and a discussion of future priorities of producer-conducted investigations and input to codes.
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