Novel design method for reinforced concrete decks in composite girders considering compressive membrane action

2021 ◽  
Vol 229 ◽  
pp. 111558
Author(s):  
Ying-Jie Zhu ◽  
Yue Yang ◽  
Jia-Ji Wang ◽  
Li-Yan Xu
Keyword(s):  
Reinforced Concrete ◽  
Design Method ◽  
Membrane Action ◽  
Compressive Membrane Action ◽  
Novel Design ◽  
Composite Girders

Load Redistribution Using Compressive Membrane Action in Reinforced Concrete Buildings

2011 ◽  
Vol 82 ◽  
pp. 272-277 ◽  
Author(s):  
Ben M. Punton ◽  
Mike P. Byfield ◽  
Peter P. Smith
Keyword(s):  
Reinforced Concrete ◽  
Experimental Testing ◽  
Load Capacity ◽  
Experimental Program ◽  
Membrane Action ◽  
Codes Of Practice ◽  
Load Paths ◽  
Arching Action ◽  
Compressive Membrane Action ◽  
Significant Underestimation

The primary function of any designed structure is to be able to support pre-determined static loads which allow the building to be occupied for its intended use. In the design process the unlikely event that the building is damaged must be considered. Often the focus is directed to the loss of primary loading elements that are fundamental to the integrity of the structure. The damage that is caused as a consequence may propagate causing collapse of surrounding elements culminating with the loss of an extensive proportion of the floor area. To prevent collapse inherent alternative load paths can be utilised. Both the elastic and plastic approved methods for the design of reinforced concrete in modern codes of practice neglect the effect of membrane forces. It has been recognised for some time that the omission of compressive membrane action (CMA), also described as ‘arching action’, can lead to a significant underestimation of load capacity. Previous studies which have attempted to determine if CMA is capable of supporting damaged columns under accidental loading conditions have not had supporting experimental testing of slabs at appropriate span to depth ratios. This paper presents an experimental program conducted on laterally restrained slab strips at approximately half scale. Combined with an analytical study, the extent to which CMA can be used as an effective robustness tool has been assessed.

Ultimate strength of three reinforced concrete highway bridges

1985 ◽  
Vol 12 (1) ◽  
pp. 63-72 ◽  
Author(s):  
I. G. Buckle ◽  
A. R. Dickson ◽  
M. H. Phillips
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Ultimate Strength ◽  
Ultimate Load ◽  
Load Capacity ◽  
Highway Bridges ◽  
Nonlinear Finite Element ◽  
Membrane Action ◽  
Element Analysis ◽  
Compressive Membrane Action

The destructive testing of three reinforced concrete highway bridges, recently made redundant by road realignment, is summarized. The procedure used to test the bridges to ultimate conditions is described and load capacities of about 20 times class 1 axle loads are reported for all structures. Analyses based on conventional ultimate strength theory can account for only two-thirds of these ultimate loads and then only if second order effects are included. A nonlinear finite element computer program has been developed and used to analyze one of these structures. Excellent prediction of the ultimate load is made by the program. It is therefore suggested that compressive membrane action, which is automatically modelled in the finite element solution, plays a significant role in the enhancement of load capacity.The paper concludes that a more sophisticated approach to the assessment of bridge load capacity is necessary if realistic estimates of actual strength are to be made. Limited experience with a nonlinear finite element program suggests one such approach. If used with care, some relief to the bridge replacement program can be expected. Key words: highway bridges, ultimate load capacity, finite element analysis, reinforced concrete, field testing, compressive membrane action.

Membrane action in reinforced concrete slabs

1990 ◽  
Vol 17 (5) ◽  
pp. 686-697 ◽  
Author(s):  
F. J. Vecchio ◽  
K. Tang
Keyword(s):  
Reinforced Concrete ◽  
Large Scale ◽  
Load Capacity ◽  
Experimental Program ◽  
Concrete Slabs ◽  
Order Effects ◽  
Membrane Action ◽  
Deformation Response ◽  
Reinforced Concrete Slabs ◽  
Compressive Membrane Action

The formation and influence of compressive membrane action in reinforced concrete slabs is discussed. An experimental program is described, in which two large-scale slab specimens were tested under concentrated midspan loads. One slab was restrained against lateral expansion at the ends, while the other was free to elongate. The laterally restrained specimen developed high axial compressive forces, which resulted in a significant increase in flexural stiffness and load capacity. A nonlinear analysis procedure was used to model specimen behaviour. The analysis method was found to adequately represent important second-order effects, and thus gave reasonably accurate predictions of load–deformation response and ultimate load. Key words: analysis, concrete, deformation, load, membrane, reinforced, slabs, strength, tests.

Sign in / Sign up

Export Citation Format

Share Document