Exploratory study of shear strength of joints for precast segmental bridges by K. Koseki Download PDF EPUB FB2
The overall findings from these limited exploratory tests on shear strength of joints in precast segmental bridges are condensed in Fig.
In terms of the maximum loads developed, all epoxied joints behaved similarly and developed loads equal to those carried by the monolithic specimens. The behavior of precast concrete segmental box girder bridges at both serviceability and ultimate strength conditions is dependent on the behavior of the joints between the segments.
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The behavior of precast concrete segmental box girder bridges at both serviceability and ultimate strength conditions is dependent on the behavior of the joints between the segments.
To accurately predict the bridge response throughout the complete range of loading, knowledge of joint behavior is by: Joints between segments in precast concrete segmental bridges (PCSB) require special attention in design and construction.
These joints introduce discontinuity in the bridge; meanwhile they must transmit compressive and shear stresses. Tests were carried out to assess the shear strength and deformation behavior of precast segmental bridge joints.
In this paper the beginning steps and the development of segmental bridges were presented through a brief history of segmental bridges. The basic types and construction methods of the segmental bridges were discussed, as well. The design concepts of the segments, types of the joints, and role of the shear keys were also by: 3.
Shear Strength of Dry Joints in Precast UHPC Segmental Bridges: Experimental and Theoretical Research Article in Journal of Bridge Engineering 24(1) October with Reads. Jiang et al studied shear behavior of various types of dry joints in segmental bridge joints, especially focusing on shear strength of keyed dry joints of steel fiber reinforced concrete (SFRC).
The experimental parameters were joint types, concrete types, key numbers, and confining stress by: 3. Precast segmental bridges made of ultrahigh-performance concrete (UHPC) have gained wide research attention and application.
The shear transfer of dry joints between UHPC segments is one of the major concerns due to the discontinuity and interruption of the reinforced bars. In this study, direct shear tests of UHPC joints were conducted. However, there is a lack of experimental data to estimate the shear strength of these joints.
In this study, serials of joints with the geometry close to an actual one, flat or keyed, dry or epoxied, single-keyed or multiple-keyed, have been tested using a direct shear experimental set-up.
Shear behavior and strength of the joints are : XM Zhou, N. Mickleborough, ZJ Li. This paper is concerned with the experimental study of shear strength and deformation of precast segmental bridge joints. The slip between the concrete segmental specimens, the failure mode of shear key and the horizontal movement between the segmental specimens are by: 3.
Joints are important to transfer shear force between bridge segments, and epoxied joints can provide shearing resistance because of their good shear property and durability. In this article, the numerical analyses of the shear capability of epoxied joints have been conducted by a finite element model.
In the analyses, the plastic damage model of concrete was used to investigate the stress Cited by: 1. Dry Joints in Precast Concrete Segmental Bridges shear strength of keyed dry joints is the work of two different mechanisms (Turmo et al.
The ﬁrst mechanism depends on analysis of precast segmental concrete bridges, not for the keyed jointsthemselves. Abstract: The shear strength of multiple-keyed joints is a very important part of the design of prestressed segmental concrete structures.
This type of structures is widely used but the formulations of different design codes deal to different values of the shear strength of joints. In this paper, it has been developed a finite element model of File Size: KB. Tests were made to study the shear behavior and strength of joints in precast concrete segmental bridges.
Tests included models of flat and keyed joints with and without epoxy (dry joints). Experimental model of keyed joints included a single key, representing one of a series of multiple keys used in precast segmental bridge joints. Koseki, K.
and Breen, J. E., ‘Exploratory Study of Shear Strength of Joints for Precast Segmental Bridges’, Research Report No. Center for Transportation Research, Bureau of Engineering Research, University of Texas at Austin ().
Google ScholarCited by: Combined Shear and Bending Behavior of Joints in Precast Concrete Segmental Beams with External Tendons *Dong-Hui Yang 1) and Ting-HuaYi2) 1), 2) School of Civil Engineering, Dalian Univ.
of Tech, 2 Linggong RD., DalianChina 1) [email protected] ABSTRACT The main objective of this study is to get a further understanding of the behavior of joints when itFile Size: 2MB. Precast post-tensioned segmental construction is defined as a method of construction for bridges, build-ings, tanks, silos, cooling towers, tunnels and other structures in which primary load carrying mem-bers are composed of precast con-crete segments post-tensioned to-gether.
Historical Background The concept of dividing precast. Shear Strength of Joints in Precast Concrete Segmental Bridges. Rombach, Guenter; Specker, Angelika // ACI Structural Journal;Nov/Dec, Vol.
Issue 6, p Comments on a paper by Xiangming Zhou, Neil Mickleborough and Zongjin Li which examined the shear strength of joints in precast concrete segmental bridges.
The use of shear key is to connect two separate precast components to increase the shear resistivity of the joint surfaces. The proposed shear key shape in this study comprises of triangular, composite rectangular, semi-circle and trapezoidal.
In addition, the trapezoidal shape is made up with 3 Author: Izni Syahrizal Ibrahim, Khairul Hazman Padil, Hamid Mansoor Ali Bady, Abdul Aziz Saim, Noor Nabilah. Precast concrete segmental bridges with dry joints have the advantages of rapid construction speed and low cost.
The shear strength and shear behavior of dry joints with castellated keys in precast concrete segmental bridges are still debatable. In this paper, full-scale dry joints with castellated keys were tested under different confining Cited by: Especially, the absence of study related to the behavior of the shear key according to the curing time of UHPC is noteworthy.
Trapezoidal shear keys in the joints are generally placed monolithically with the segments. The shape of the shear key varies with respect to the inclination angle of the shear key and its protruding height. Yang and Kim File Size: KB.
68 Hualian Liang et al.: Numerical Analyses of Shear Behaviors of Epoxy Joints in Precast Concrete Segmental Bridges reasonable, safe, durable, and economic epoxied joints could be designed according to results obtained in this article.
Numerical SimulationCited by: 1. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, Includes bibliographical references (leaves ).Cited by: RE: Shear strength of precast segment ishvaaag (Structural) 30 Apr 02 If one follows somewhat closely the AASHTO design guide for segmental bridge construction (), yes, you need to check also shear in the ordinary ways for prestressed beams even if you have checked that the extant reinforcement across any section is enough to satisfy.
In order to grasp the shear strength of a precast segment structure with external tendons, shear tests were carried out on nine different cantilever beams. The parameters were in situ concrete or precast segment, internal and external prestressing, and shear keys.
This paper presents the results of these tests and proposes a new formulation to Cited by: 3. A precast wall‐type building is constructed by stacking wall panels and slabs.
This paper presents a study of the in‐plane shear behavior of vertical grouted joints between precast panels. Thirteen jointed wall panel specimens were tested under direct : Aparup Biswal, Anumolu Meher Prasad, Amlan Kumar Sengupta.
Shear tests on three types of joint between precast post-tensioned units have given data from which the minimum shear strength of these joints may be calculated.
The minimum value of the coefficient of friction of the surfaces at a plain butt joint was found to be 0 and that of the surfaces at a mortar joint 0 Cited by: 9.
When ultra-high performance concrete (UHPC) is fabricated as precast members such as in a UHPC segmental bridge, the joint design between the precast members can significantly affect the overall integrity and safety of the structure. Therefore, the structural behavior of the UHPC joint was experimentally investigated in this study with test variables including joint type, number and height of Cited by: 1.
Based on the conclusion of shear stiffness experiment of vertical segmental joint in cantilever casting concrete bridges (CCCB), finite element models (FEM) study was conducted to assess the shear stiffness of sloping segmental joints in this paper. Through the comparison of calculating relative vertical displacement at joint between vertical and sloping joint, it can be educed that the shear Cited by: 1.
Research Study Title: ''Fatigue Strength of Posttensioned Concrete" Abstract This report presents the results of an exploratory investigation of shear fatigue behavior of precast prestressed girders with unshored cast-in-place slabs.
It includes a literature survey of File Size: 4MB.dry joint, in which no epoxy is applied, for segmental bridges wherever is possible to avoid the problems in epoxy joints . The shear transfer across an opening joint is a very complex problem for precast segmental concrete beams with external tendons.
As load passes to the limit stage, a segmental joint opens due to the lack.Introduction. With the development of industrialization, precast concrete structures are currently used due to the advantages of lower cost, better quality, more rapid construction, and lower impact on environment etc.
in comparison with cast-in-situ structures [1, 2].The connection between the elements of a precast concrete structure is always a research emphasis, as it determines the Cited by: 3.