Ultimate Load Test of Truss Bridge Floor System

1976 ◽  
Vol 102 (7) ◽  
pp. 1383-1398
Author(s):  
Wallace W. Sanders ◽  
F. Wayne Klaiber ◽  
Hotten A. Elleby ◽  
Leonard W. Timm
Keyword(s):  
Ultimate Load ◽  
Load Test ◽  
Truss Bridge ◽  
Floor System

Study on Safety Evaluation of an Aged Steel Truss Bridge with Cracking Members

2009 ◽  
Vol 417-418 ◽  
pp. 909-912
Author(s):  
Lan Chao Jiang ◽  
Ri Gao
Keyword(s):  
Ultimate Load ◽  
Dynamic Test ◽  
Safety Evaluation ◽  
Steel Structures ◽  
Load Test ◽  
Magnetic Method ◽  
Steel Truss Bridge ◽  
Load Carrying ◽  
Steel Truss ◽  
Truss Bridge

The safety of aged steel structures, especially those with cracking members, has aroused a great deal of attention. In this paper, the application of fracture mechanics for evaluating the ultimate load-carrying of steel material is proposed. Three-point bending tests of three specimens with the mode-I fracture are done to get the ultimate load-carrying capacity, when specimens are destroyed. Fracture ductility KIC, and the steel allowable stress [σ] with certain crack length are formulated. Magnetic method for measuring cracks of steel members is adopted for an aged steel truss bridge, and material composition of specimens is tested, and field nondestructive load test involved static and dynamic test are carried into execution. By comparing the results of the calculation and those of the field test, some conclusions are obtained, which are likely to contribute to safety evaluation of aged steel structures, or contribute to designing similar bridges.

scholarly journals Strengthening of RCC Beams in Shear by Using SBR Polymer-Modified Ferrocement Jacketing Technique

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Rajinder Ghai ◽  
Prem Pal Bansal ◽  
Maneek Kumar
Keyword(s):  
Carrying Capacity ◽  
Shear Failure ◽  
Ultimate Load ◽  
Load Test ◽  
Wire Mesh ◽  
Styrene Butadiene Rubber ◽  
Shear Load ◽  
Butadiene Rubber ◽  
Load Carrying Capacity ◽  
Load Carrying

There is a common phenomenon of shear failure in RCC beams, especially in old buildings and bridges. Any possible strengthening of such beams is needed to be explored that could strengthen and make them fit for serviceable conditions. The present research has been made to determine the performance of predamaged beams strengthened with three-layered wire mesh polymer-modified ferrocement (PMF) with 15% styrene-butadiene-rubber latex (SBR) polymer. Forty-eight shear-designed and shear-deficient real-size beams were used in this experimental work. Ultimate shear load-carrying capacity of control beams was found at two different shear-span (a/d) ratios 1 and 3. The sets of remaining beams were loaded with different predetermined damage levels of 45%, 75%, and 95% of the ultimate load values and then strengthened with 20 mm thick PMF. The strengthened beams were then again tested for ultimate load-carrying capacity by conducting the shear load test at a/d = 1 and 3. As a result, the PMF-strengthened beams showed restoration and enhancement of ultimate shear load-carrying capacity by 5.90% to 12.03%. The ductility of strengthened beams was improved, and hence, the corresponding deflections were prolonged. On the other hand, the cracking pattern of PMF-strengthened beams was also improved remarkably.

Ultimate Load Test of Slab‐on‐Girder Bridge

1992 ◽  
Vol 118 (6) ◽  
pp. 1608-1624 ◽  
Author(s):  
Baidar Bakht ◽  
Leslie G. Jaeger
Keyword(s):  
Ultimate Load ◽  
Load Test ◽  
Girder Bridge

FINITE ELEMENT ANALYSES ON CORRODED PONY TRUSS BRIDGE FOR REASONABLE MAINTENANCE

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Risa Fujinaga ◽  
Tatsumasa Kaita ◽  
Ryoko Koyama ◽  
Tsutomu Imai ◽  
Katashi Fujii
Keyword(s):  
Bearing Capacity ◽  
Ultimate Load ◽  
Plane Deformation ◽  
Element Model ◽  
Truss Structures ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Out Of Plane ◽  
Pony Truss Bridge ◽  
Truss Bridge

The load bearing capacity of an existing corroded pony truss bridge, which is used for 100 years was estimated from FEM results for whole bridge model. The beam element model is to clarify that the influence of the residual out-of-plane deformation in main truss structures on the load bearing capacity from the viewpoint of whole bridge. Also, shell element model is to clarify that the influence of severe corrosion damages occurred in many structural members on the load bearing capacity as whole bridge. On the other hand, the influence of assumed support conditions in analytical models were discussed from the analytical results of both type of models, because it will be thought that the performance of shoes deteriorates gradually by long in-service period. The ultimate load bearing capacity was estimated by the critical live load magnification. From the analytical results, the residual out-of-plane deformation of main truss structures in this bridge had little influence on the ultimate load bearing capacity. Also, the ultimate load bearing capacity may decrease up to 20% due to aging deterioration of shoes including corrosion damages. In bridge maintenance, it should be paid attention on local severe corrosion damages on the structural member, which may occur higher secondary stress.

scholarly journals STUDY ON DESIGN METHOD OF RAILWAY THROUGH-TRUSS BRIDGE WITH SRC FLOOR SYSTEM

2006 ◽  
Vol 62 (1) ◽  
pp. 53-67
Author(s):  
Shuji YAJIMA ◽  
Yuichi UCHIDA ◽  
Keitetsu ROKUGO ◽  
Shigeki KITAZONO ◽  
Atushi ICHIKAWA
Keyword(s):  
Design Method ◽  
Truss Bridge ◽  
Floor System

Flexural behavior of sustainable reactive powder concrete bubbled slab flooring elements

2017 ◽  
Vol 3 (2) ◽  
pp. 81 ◽  
Author(s):  
Ashraf Abdulhadi Alfeehan ◽  
Hassan Issa Abdulkareem ◽  
Shahad Hameed Mutashar
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Reactive Powder Concrete ◽  
Concrete Slabs ◽  
Concrete Floor ◽  
Reinforced Concrete Slabs ◽  
Reactive Powder ◽  
Floor System

Voided slabs are reinforced concrete slabs in which voids allow to reduce the amount of concrete. The bubbled deck slab is a new and sustainable biaxial floor system to be used as a self-supporting concrete floor. The use of voided slabs leads to decrease the consumption of materials and improve the insulation properties for enhancing the objectives of sustainability. This study presents an investigation into the flexural behavior of sustainable Reactive Powder Concrete RPC bubbled slab flooring elements. Six one-way slabs were cast and tested up to the failure. The adopted variables in this study are: the volumetric ratio of steel fibers, type of slab; bubbled or solid, placing of reinforcement and thickness of slab. The effect of each variable on the ultimate load, deflection and strain has been discussed. The results show that increasing the percent of steel fibers from 1% to 2% in solid and bubbled slabs decreases the deflection by (18.75%) and (50%) respectively. As well as, the deflection increases by (41%) for bubbled slab compared to the solid slab. The slabs reinforced with top and bottom steel meshes show less deflection than slabs reinforced by only bottom steel mesh.

Structural Analysis and Load Test of a Nineteenth-Century Iron Bowstring Arch-Truss Bridge

2013 ◽  
Vol 18 (3) ◽  
pp. 261-271 ◽  
Author(s):  
Cristopher D. Moen ◽  
Elaine E. Shapiro ◽  
Julia Hart
Keyword(s):  
Nineteenth Century ◽  
Structural Analysis ◽  
Load Test ◽  
Truss Bridge

Comparison of pile load test methods

1989 ◽  
Vol 26 (4) ◽  
pp. 742-744 ◽  
Author(s):  
R. C. Joshi ◽  
H. D. Sharma ◽  
D. G. Sparrow
Keyword(s):  
Axial Force ◽  
Applied Load ◽  
Ultimate Load ◽  
Axial Loading ◽  
Test Methods ◽  
Point Load ◽  
Load Test ◽  
Force Distribution ◽  
Loading Test ◽  
Shaft Resistance

Instrumented model piles were loaded to failure using slow-maintained-load, quick-maintained-load, and constant-rate-of-penetration methods of loading. The piles were driven in a prepared dry-sand bed. The applied load, point load, and shaft resistance were measured using load cells and strain gauges, and axial force distribution was determined. Test data indicate that all the three methods give similar ultimate load at failure. Nonetheless, out of the three methods, the slow-maintained-load method of testing piles, which seems to simulate field conditions, gives the largest settlement for the same applied load. The axial force distribution and shaft resistance along the pile were observed to be identical for all the three pile test methods. Key words: model piles, laboratory study, axial loading, test methods, sands, point load, shaft resistance, ultimate load.

Sign in / Sign up

Export Citation Format

Share Document