The Effect of Degree of Composite Action on Reduced Web Section (RWS) Connections

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 843-849
Author(s):  
Fahad Falah Almutairi ◽  
Konstantinos Daniel Tsavdaridis
Keyword(s):  
Composite Action

General Methodology for Evaluating Composite Action in Insulated Wall Panels

2017 ◽  
Author(s):  
Jaiden Olsen ◽  
Salam Al-Rubaye ◽  
Taylor Sorensen ◽  
Marc Maguire
Keyword(s):  
Composite Action ◽  
General Methodology ◽  
Wall Panels

The impact of stirrups on the composite action of concrete-filled steel tubular stub columns under axial loading

Structures ◽  
2021 ◽  
Vol 30 ◽  
pp. 786-802
Author(s):  
De-ren Lu ◽  
Wen-jun Wang ◽  
Fa-xing Ding ◽  
Xue-mei Liu ◽  
Chang-jing Fang
Keyword(s):  
Axial Loading ◽  
Composite Action ◽  
The Impact ◽  
Stub Columns

scholarly journals Experimental Behavior of Steel-Concrete Composite Girders with UHPC-Grout Strip Shear Connection

Buildings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 182
Author(s):  
Zhi-Qi He ◽  
Changxue Ou ◽  
Fei Tian ◽  
Zhao Liu
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Fatigue Testing ◽  
Ultimate Capacity ◽  
Horizontal Shear ◽  
Interface Failure ◽  
Interface Shear ◽  
Composite Action ◽  
Shear Connection ◽  
Push Out

This paper develops a new type of shear connection for steel-concrete composite bridges using Ultra-High Performance Concrete (UHPC) as the connection grout. The UHPC-grout strip shear connection is fabricated by preforming a roughened slot in the concrete deck slab, welding an embossed steel rib longitudinally to the upper flange of the steel girder, and casting the strip void between the slot and the steel rib with UHPC grout. The structural performance of the new connection was validated by two sets of experimental tests, including push-out testing of shear connectors and static and fatigue testing of composite beams. The results of push-out testing indicate that the UHPC-grout strip shear connection exhibits a significant improvement of ductility, ultimate capacity, and fatigue performance. The interface shear strength of the UHPC-grout strip connection is beyond 15 MPa, which is about three times that of the strip connection using traditional cementitious grouts. The ultimate capacity of the connection is dominated by the interface failure between the embossed steel and the UHPC grout. The results of composite-beam testing indicate that full composite action is developed between the precast decks and the steel beams, and the composite action remained intact after testing for two million load cycles. Finally, the trail design of a prototype bridge shows that this new connection has the potential to meet the requirements for horizontal shear.

General Microhardness Indentation Theory for Multilayer Contacts

1997 ◽  
Vol 119 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Peter A. Engel ◽  
Qian Yang
Keyword(s):  
Iterative Procedure ◽  
Microhardness Measurement ◽  
Computational Method ◽  
Experimental Investigations ◽  
Load Range ◽  
Composite Action ◽  
Refined Method ◽  
General Rules ◽  
Microhardness Indentation ◽  
Multilayer Materials

A refined method for interpreting the Vickers composite microhardness measurement for multilayer materials having layers of arbitrary plating thickness is first presented. The position of an “effective substrate” is found using the concept of the “plastic boundary,” and the depth-wise deformation of each layer is considered in a double-iterative procedure which converges fast. This computational method is then extended from pyramidal indenters to conical and spherical indenters (e.g., Meyer’s). For its confirmation, experimental investigations are carried out for two configurations of Cu/Ni/Au sandwiches, using different diameter spherical indenters and spherical tipped cones, through and well above the microhardness load range. The general rules for composite action are established.

scholarly journals Material Selection and Characterization for a Novel Frame-Integrated Curtain Wall

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1896
Author(s):  
Mercedes Gargallo ◽  
Belarmino Cordero ◽  
Alfonso Garcia-Santos
Keyword(s):  
Material Selection ◽  
Mechanical Tests ◽  
Shear Stresses ◽  
Curtain Wall ◽  
Composite Action ◽  
High Rise ◽  
Glass Fiber Reinforced ◽  
Glass Panels ◽  
Computer Based ◽  
Conventional Systems

Curtain walls are the façade of choice in high-rise buildings and an indispensable element of architecture for a contemporary city. In conventional curtain walls, the glass panels are simply supported by the metal framing which transfers any imposed load to the building structure. The absence of composite action between glass and metal results in deep frames, protruding to the inside, occupying valuable space and causing visual disruption. In response to the limited performance of conventional systems, an innovative frame-integrated unitized curtain wall is proposed to reduce structural depth to one fifth (80%) allowing an inside flush finish and gaining nettable space. The novel curtain wall is achieved by bonding a pultruded glass fiber reinforced polymer (GFRP) frame to the glass producing a composite insulated glass unit (IGU). This paper selects the candidate frame and adhesive materials performing mechanical tests on GFRP pultrusions to characterize strength and elasticity and on GFRP-glass connections to identify failure module and strength. The material test results are used in a computer-based numerical model of a GFRP-glass composite unitized panel to predict the structural performance when subjected to realistic wind loads. The results confirm the reduction to one fifth is possible since the allowable deflections are within limits. It also indicates that the GFRP areas adjacent to the support might require reinforcing to reduce shear stresses.

Photoelastic analysis of composite action of walls supported on beams

1976 ◽  
Vol 11 (2) ◽  
pp. 139-144 ◽  
Author(s):  
K. Chandrashekhara ◽  
K.Abraham Jacob
Keyword(s):  
Composite Action ◽  
Photoelastic Analysis

Sensitivity of Composite and Non-Composite Space Trusses to Member Loss

1994 ◽  
Vol 9 (2) ◽  
pp. 107-119 ◽  
Author(s):  
Ahmed El-Sheikh
Keyword(s):  
Double Layer ◽  
Concrete Slab ◽  
Noticeable Effect ◽  
Composite Action ◽  
Space Truss ◽  
Space Trusses ◽  
Loss Factors

Since double layer space trusses have typically a large number of redundant members, it is frequently assumed that they are quite safe as the loss of one or more members can be accommodated without any noticeable effect on truss overall behaviour. The present study shows that every truss includes a number of critical members, the loss of any of which would cause force distributions that could lead to an overall premature collapse. The sensitivity of space trusses to member loss is clearly identified. The composite action between a top concrete slab and a space truss is also introduced as a means to control truss sensitivity to member loss. Factors that affect this sensitivity such as the truss supporting conditions are also investigated.

Composite Action in Eccentrically Braced Frames

1989 ◽  
Vol 115 (8) ◽  
pp. 2046-2066 ◽  
Author(s):  
James M. Ricles ◽  
Egor P. Popov
Keyword(s):  
Braced Frames ◽  
Eccentrically Braced Frames ◽  
Composite Action
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