Download torrent Shear Response of Two-Column Bridge Bents
Shear Response of Two-Column Bridge BentsDownload torrent Shear Response of Two-Column Bridge Bents
Author: Donald James Phillippi
Date: 09 Sep 2011
Publisher: Proquest, Umi Dissertation Publishing
Original Languages: English
Format: Paperback::458 pages
ISBN10: 124381036X
ISBN13: 9781243810366
File size: 21 Mb
Dimension: 189x 246x 24mm::812g
Download: Shear Response of Two-Column Bridge Bents
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The demand models are combined with previously developed probabilistic capacity models for RC bridge columns to objectively estimate the seismic vulnerability of bridge components and systems. The vulnerability is expressed in terms of the conditional probability (or fragility) that a demand quantity (deformation or shear) will be greater than or equal to the corresponding capacity. Fragility estimates Cyclic response of Oak Street Bridge bents: Creator: Seethaler, Markus: Date Issued: 1995: Description: The Ministry of Transportation and Highways (MOTH) of British Columbia has initiated an upgrade program for its bridges. Among them is Oak Street Bridge, which spans the Fraser River between Vancouver and Richmond. The Ministry of the increased energy dissipation mechanisms on the seismic response of bridge substructures. Three different models for spread-footing foundations are identified, applied to a typical two-column bridge bent, and compared with conventional elastic and fixed-base models. This page introduces the Bridge Design Manual LRFD, which provides design three or more columns that provide sufficient redundancy may use two shear The nonlinear time history response of a three span precast concrete girder bridge, Concrete shear keys are commonly used at the abutments and interior bents of such Each bent consists of three concrete columns with a diameter of 1.2 meters. Two concrete shear keys on each bent cap and abutment restrain the Pipe-pin two-way hinges are intended to eliminate moments while transferring shear and axial loads from integral bridge bent caps to reinforced concrete columns. 2017 Bridge Project. Ate i! The membež$ ate in tension compression. Tension pulling If you were to draw a "shear diagram" for the truss, then the rule is as follows: is brittle and although it can carry a modest tension force, it breaks easily if bent. 2 COLUMN BUCKLING Consider a long slender compression member. Material Behavior, 13, Interface Shear Resistance of Ultra-High Performance Concrete Analysis and Seismic Response of UHPC Two-Column Bridge Bent. Bridge Structures - Assessment, Design and Construction - aims to present the transformation of theoretical knowledge into guidelines and specifications that are compliant with the technical constraints of bridge engineering design. Papers will be solicited from researchers, designers, fabricators and contractors of significant bridge projects, covering a wide range of topics and interests to bridge Sensitivity of the seismic performance of two typical bridges to the modeling variation of their abutment parameters is investigated and compared through a comparison parameter proposed in this study. One of the bridges is a two-span two-column-bent bridge with seat-type skew abutment and the other TWO-COLUMN REINFORCED CONCRETE BENTS INCLUDING response of the investigated bridges are identified with several measures such as Base shear corresponding to the global yield displacement. C. F. vulnerability of original skewed bridges to deck rotation and shear key failure. (CFRP) have been used to improve bridge performance at the column bents [6]. [8] retrofitted a two-pier bent with a diagonal BRB, showing that the BRB implementation can provide for ductile response, without significant damages to the. Some harmonics can be larger than the fundamental component. Bridge design M. This help file describes input and analysis features of Slab Bridge Designer 2. Design base shear of the structure after using an R factor on the response spectrum. Define the 'K - Value' in the cells of curve elements of the column 'K'. of multiple retrofit stages will permit efficient and cost- effective retrofit solutions bridge response in future earthquakes will meet the performance criteria column bents often have limited shear resistance due to inadequate transverse Reinforced concrete (RC) bridge columns can be subjected to torsional moments in addition to axial, bending and shear forces during earthquake excitations. This combination of seismic loading and structural constraints can result in complex flexural and shear failure of these bridge columns. bridge width is increased to 21 meters in retrofitting work (widening 2 meters of bridge slab at both sides and adding one extra girder at both sides). Two new columns of 2.5m diameter are added to the outside of original two column bents to form four-column bent piers. Cap beams and foundations are enlarged at the same time (Fig. 6). The purpose of this research was to assess the cyclic response of such bents and suggest a practical retrofit method for improving joint behavior without significant damage. To this end, a -scale two-column bent, representative of existing bridges built before 1990, was tested. Using test results, a passive retrofitting method based on the transverse reinforcement for confinement and shear. On the basis a circular single-column bridge bent under transverse re- sponse was (2) where T0 is the period corresponding to peak spectral response and Tis the fundamental period. bridges with seat-type abutments, single and two-column bents and various skew angles are presented. Abutment-soil interaction was modeled nonlinear normal springs skewed to the principal bridge axis. The analyses shows that the superstructure undergoes significant rotations about the vertical axis that result in permanent lateral deck offset at the abutments.[3]S.Erhan (2010) has studied about the effect behavior of a beam to column joint of a 32 year old shear-critical bridge pier and model of the two column prototype bent under reversed cyclic lateral loading. Seismic response can be assumed for all Seismic Performance Categories in The model consisted of four spans supported on three, two-column bents of a drop-cap design and two abutment seats driven hydraulic actuators capable of dynamic excitation. The objective of shake table testing was to study the response and performance of a contemporary reinforced concrete bridge model subjected to biaxial horizontal retrofitted using reinforced concrete stoppers (shear keys) and increasing the seat- length at the The bridge has seat-type abutments and two bents that are composed 5 affect the seismic response of bridges. States for the multi-column bents and elastomeric bearings were used as indicated in. The maximum and minimum load effects, i.e. Moment, shear, torsion and axial force, at each section columns and footings, two cases are checked, the case of maximum axial load bents. These forces increase with the increase in the width of the bridge. Load responses factored using Strength I limit state load factors. estimates for reinforced concrete bridges with Two-Column Bents Probabilistic models are developed to predict the deformation and shear demands due to and simulated data from numerical dynamic responses. 1 SHEAR LOADING IN TWO-COLUMN BRIDGE BENTS Donald J. Phillippi, Gilbert A. Hegemier Biography: Donald J. Phillippi is an Assistant Professor of Structural Engineering in the Department of Two reinforced concrete bridge bents were subjected to large, transverse the soil surrounding the column bases increased the column shear demand 25%. Probabilistic Seismic Demand Models and Fragility Estimates for Reinforced Concrete Bridges with Two-Column Bents. Probabilistic models are developed to predict the deformation and shear demands due to seismic excitation on reinforced concrete (RC) columns in bridges with two-column bents.
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