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Shear behavior and design of prestre...

Laskar, Arghadeep.

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Shear behavior and design of prestressed concrete members.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Shear behavior and design of prestressed concrete members./
作者:	Laskar, Arghadeep.
面頁冊數:	287 p.
附註:	Source: Dissertation Abstracts International, Volume: 71-08, Section: B, page: 4987.
Contained By:	Dissertation Abstracts International71-08B.
標題:	Engineering, Civil. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3416784
ISBN:	9781124110158

Shear behavior and design of prestressed concrete members.
Laskar, Arghadeep.

Shear behavior and design of prestressed concrete members. - 287 p.

Source: Dissertation Abstracts International, Volume: 71-08, Section: B, page: 4987.

Thesis (Ph.D.)--University of Houston, 2009.

Prestressed concrete has become the predominant construction method in highway bridge girders. This research aims to solve one of the most troublesome problems in prestressed concrete beams, namely the shear problem. In fact, there is at present no rational model to predict the shear behavior of prestressed concrete structures and the various modes of shear failures. Because of this deficiency, all the shear design provisions, such as those in the ACI Codes and AASHTO Specifications, are empirical, complicated and have severe limitations. In this research, five full-scale prestressed concrete I-beams were tested to study the effect of three variables, namely, the shear-span-to-depth ratio, the transverse steel ratio, and the draped strands, on the two types of shear failure capacities, namely, the web-shear and the flexural-shear. The results from these tests, together with those found in literature, were used to develop a rational, yet simple, equation for calculating the shear strengths of prestressed concrete beams. The new shear strength equation proposed in this research significantly reduces the unwarranted conservatism of the ACI Code, and guards against the unsafe nature of the AASHTO specifications for high strength concrete.

ISBN: 9781124110158Subjects--Topical Terms:

783781
Engineering, Civil.

Shear behavior and design of prestressed concrete members.
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245 1 0 $a Shear behavior and design of prestressed concrete members.
300 $a 287 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-08, Section: B, page: 4987.
500 $a Adviser: Y. L. Mo.
502 $a Thesis (Ph.D.)--University of Houston, 2009.
520 $a Prestressed concrete has become the predominant construction method in highway bridge girders. This research aims to solve one of the most troublesome problems in prestressed concrete beams, namely the shear problem. In fact, there is at present no rational model to predict the shear behavior of prestressed concrete structures and the various modes of shear failures. Because of this deficiency, all the shear design provisions, such as those in the ACI Codes and AASHTO Specifications, are empirical, complicated and have severe limitations. In this research, five full-scale prestressed concrete I-beams were tested to study the effect of three variables, namely, the shear-span-to-depth ratio, the transverse steel ratio, and the draped strands, on the two types of shear failure capacities, namely, the web-shear and the flexural-shear. The results from these tests, together with those found in literature, were used to develop a rational, yet simple, equation for calculating the shear strengths of prestressed concrete beams. The new shear strength equation proposed in this research significantly reduces the unwarranted conservatism of the ACI Code, and guards against the unsafe nature of the AASHTO specifications for high strength concrete.
520 $a The second part of this research involves the development of computer programs for analysis of shear-critical prestressed concrete structures. Constitutive laws of prestressed concrete, developed through previous research at UH, has been implemented into an object-oriented software framework called "Open System for Earthquake Engineering Simulation (OpenSees)" originally developed at University of California, Berkeley. New modules have been created for concrete under prestress as well as for prestressing tendons based on the constitutive laws of these materials developed at UH. A new module for 2-dimensional prestressed concrete membranes has also been created. These three new material modules have been integrated with the existing material modules in OpenSees. The computer program thus developed has been used for predicting the behavior of the prestressed concrete I-beams tested in the first part of this research. Finally, the developed computer program has been applied to analyze three post-tensioned precast segmental bridge columns tested under reverse loads at State University of New York (SUNY) Buffalo.
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793 $a English
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