scholarly journals Structural behavior and shear bond capacity of composite slabs with high performance concrete

2021 ◽  
Author(s):  
Faheem Abdul
Keyword(s):  
High Performance ◽  
Failure Modes ◽  
High Performance Concrete ◽  
Longitudinal Shear ◽  
Experimental Investigations ◽  
Test Results ◽  
Strain Development ◽  
Self Consolidating Concrete ◽  
Composite Slabs ◽  
Steel Deck

Many research works have been conducted on the behavior of composite slabs with profiled steel deck to study the longitudinal shear bond resistance using the m-k method. In this study, experimental investigations are conducted to evaluate the shear bond characeristics of composite slabs. 15 composite slabs are tested to study the effect of different high performance concrete (HPC) mixes namely engineered cementitious composites (ECC) and self-consolidating concrete (SCC), diverse profile sheets (with embossments or without embossments) and variable shear span on load-deflection characteristics, stress-strain development in concrete/steel, cracking/crack propagation and failure modes. The values of shear bond parameters (m and k) derived from the test results can be used for the design of composite slabs.

scholarly journals Structural behavior and shear bond capacity of composite slabs with high performance concrete

2021 ◽  
Author(s):  
Faheem Abdul
Keyword(s):  
High Performance ◽  
Failure Modes ◽  
High Performance Concrete ◽  
Longitudinal Shear ◽  
Experimental Investigations ◽  
Test Results ◽  
Strain Development ◽  
Self Consolidating Concrete ◽  
Composite Slabs ◽  
Steel Deck

Many research works have been conducted on the behavior of composite slabs with profiled steel deck to study the longitudinal shear bond resistance using the m-k method. In this study, experimental investigations are conducted to evaluate the shear bond characeristics of composite slabs. 15 composite slabs are tested to study the effect of different high performance concrete (HPC) mixes namely engineered cementitious composites (ECC) and self-consolidating concrete (SCC), diverse profile sheets (with embossments or without embossments) and variable shear span on load-deflection characteristics, stress-strain development in concrete/steel, cracking/crack propagation and failure modes. The values of shear bond parameters (m and k) derived from the test results can be used for the design of composite slabs.

Shear resistance of self-consolidating concrete beams — experimental investigations

2005 ◽  
Vol 32 (6) ◽  
pp. 1103-1113 ◽  
Author(s):  
M Lachemi ◽  
K M.A Hossain ◽  
V Lambros
Keyword(s):  
High Performance ◽  
Failure Modes ◽  
Coarse Aggregate ◽  
High Performance Concrete ◽  
Maximum Size ◽  
Shear Resistance ◽  
Resistance Mechanisms ◽  
Experimental Investigations ◽  
Self Consolidating Concrete ◽  
Aggregate Interlock

Self-consolidating concrete (SCC) is a new generation of high performance concrete known for its excellent deformability and high resistance to segregation and bleeding. Lack of information regarding in situ properties and structural performance of SCC is one of the main barriers to its acceptance in the construction industry. There is some concern among researchers and designers that SCC may not be strong enough in shear because of some uncertainties in mechanisms resisting shear — notably the aggregate interlock mechanism. Because of the presence of comparatively smaller amount of coarse aggregates in SCC, the fracture planes are relatively smooth as compared with normal concrete (NC) that may reduce the shear resistance of concrete by reducing the aggregate interlock between the fracture surfaces. The paper compares the shear resistance of SCC and NC based on the results of an experimental investigation on 18 flexurally reinforced beams without shear reinforcements. The test parameters include concrete type, maximum size of coarse aggregate, coarse aggregate content, and beam shear span-to-depth ratio. Shear strength, shear ductility, crack patterns, and failure modes of all experimental beams are compared to analyze the shear resistance mechanisms of SCC and NC beams in both pre- and post-cracking stages. The recommendations of this paper can be of special interest to designers considering the use of SCC in structural applications.Key words: self-consolidating concrete, shear resistance, shear resistance factor, aggregate interlock, dowel action.

scholarly journals Structural behaviour of composite slab with high performance concretes

2021 ◽  
Author(s):  
Haile Mengistu
Keyword(s):  
High Performance ◽  
Failure Modes ◽  
Experimental Investigations ◽  
Structural Behaviour ◽  
Interface Shear ◽  
Composite Slab ◽  
Composite Slabs ◽  
Energy Absorbing ◽  
Steel Deck ◽  
Bond Characteristics

Composite slabs with profiled steel deck and concrete toping have gained wide acceptance as they lead to faster, lighter and economical construction. Extensive research works have been conducted on the behaviour of composite slabs to study their structural behavior and steel-concrete interface shear bond resistance which primarily governs the failure. However, the use of emerging highly durable engineered cementitous composite (ECC) in composite slab is new and no research has been conducted yet. High strain hardening and intrinsic crack width characteristics of ECC can significantly improve structural performance of composite slabs through enhancing ductility, energy absorbing capacity and steel-concrete shear bond. In this study, experimental investigations are conducted to evaluate the shear bond characteristics of composite slabs made with ECC and conventional self-consolidating concrete (SCC) using Code based m-k method. Twelve slab specimens having variable shear span and two types of profiled steel deck were tested under four point loading. The performance of ECC and SCC composite slabs are compered based on load-deflection response, stress-strain development in concrete and steel, failure modes, energy absorbing capacity and steel-concrete shear bond parameters (m and k) and bond stress.

scholarly journals Structural behaviour of composite slab with high performance concretes

2021 ◽  
Author(s):  
Haile Mengistu
Keyword(s):  
High Performance ◽  
Failure Modes ◽  
Experimental Investigations ◽  
Structural Behaviour ◽  
Interface Shear ◽  
Composite Slab ◽  
Composite Slabs ◽  
Energy Absorbing ◽  
Steel Deck ◽  
Bond Characteristics

Composite slabs with profiled steel deck and concrete toping have gained wide acceptance as they lead to faster, lighter and economical construction. Extensive research works have been conducted on the behaviour of composite slabs to study their structural behavior and steel-concrete interface shear bond resistance which primarily governs the failure. However, the use of emerging highly durable engineered cementitous composite (ECC) in composite slab is new and no research has been conducted yet. High strain hardening and intrinsic crack width characteristics of ECC can significantly improve structural performance of composite slabs through enhancing ductility, energy absorbing capacity and steel-concrete shear bond. In this study, experimental investigations are conducted to evaluate the shear bond characteristics of composite slabs made with ECC and conventional self-consolidating concrete (SCC) using Code based m-k method. Twelve slab specimens having variable shear span and two types of profiled steel deck were tested under four point loading. The performance of ECC and SCC composite slabs are compered based on load-deflection response, stress-strain development in concrete and steel, failure modes, energy absorbing capacity and steel-concrete shear bond parameters (m and k) and bond stress.

scholarly journals Application of PZT Technology and Clustering Algorithm for Debonding Detection of Steel-UHPC Composite Slabs

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2953 ◽  
Author(s):  
Banfu Yan ◽  
Qiqi Zou ◽  
You Dong ◽  
Xudong Shao
Keyword(s):  
Lead Zirconate Titanate ◽  
High Performance ◽  
Clustering Algorithm ◽  
High Performance Concrete ◽  
Fatigue Cracks ◽  
Experimental Tests ◽  
Interfacial Debonding ◽  
Data Set ◽  
Composite Slabs ◽  
Steel Deck

A lightweight composite bridge deck system composed of steel orthotropic deck stiffened with thin Ultra-High Performance Concrete (UHPC) layer has been proposed to eliminate fatigue cracks in orthotropic steel decks. The debonding between steel deck and UHPC layer may be introduced during construction and operation phases, which could cause adverse consequences, such as crack-induced water invasion and distinct reduction of the shear resistance. The piezoelectric lead zirconate titanate (PZT)-based technologies are used to detect interfacial debonding defects between the steel deck and the UHPC layer. Both impedance analysis and wave propagation method are employed to extract debonding features of the steel-UHPC composite slab with debonding defect in different sizes and thicknesses. Experimental tests are performed on two steel-UHPC composite slabs and a conventional steel-concrete composite deck. Additionally, an improved Particle Swarm Optimization (PSO)-k-means clustering algorithm is adopted to obtain debonding patterns based on the feature data set. The laboratory tests demonstrate that the proposed approach provides an effective way to detect interfacial debonding of steel-UHPC composite deck.

Accelerated testing of super lightweight UHPC waffle deck under heavy vehicle simulator

2021 ◽  
Vol 16 (2-3) ◽  
pp. 61-74
Author(s):  
Sahar Ghasemi ◽  
Amir Mirmiran ◽  
Yulin Xiao ◽  
Kevin Mackie
Keyword(s):  
High Performance ◽  
Failure Modes ◽  
High Performance Concrete ◽  
High Strength ◽  
Heavy Vehicle ◽  
Wheel Load ◽  
Element Analysis ◽  
Vehicle Simulator ◽  
Pavement Testing ◽  
Heavy Vehicle Simulator

A super lightweight deck can enhance load rating and functionality of a bridge, especially those identified as structurally deficient. This study was aimed to develop and experimentally validate a novel bridge deck as an ultra-lightweight low-profile waffle slab of ultra-high-performance concrete (UHPC) with either carbon fiber reinforced polymer (CFRP) or high strength steel (HSS) reinforcement. The proposed system lends itself to accelerated bridge construction, rapid deck replacement in bridges with load restrictions, and bridge widening applications without the need to replace girders. Performance and failure modes of the proposed deck were initially assessed through extensive lab experiments and finite element analysis, which together confirmed that the proposed deck panel meets the AASHTO LRFD requirements. The proposed deck system is not susceptible to punching shear of its thin slab and fails in a rather ductile manner. To evaluate its long-term performance, the system was further tested under the dynamic impact of wheel load at the Accelerated Pavement Testing (APT) facility of the Florida Department of Transportation using a Heavy Vehicle Simulator (HVS).

Development of Some Performance-Based Material Specifications for High-Performance Concrete Pavement

2003 ◽  
Vol 1834 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Prasada Rao Rangaraju
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Concrete Pavement ◽  
Performance Criteria ◽  
Test Results ◽  
Department Of Transportation ◽  
Performance Specifications ◽  
Concrete Materials ◽  
Practical Feasibility

In collaboration with FHWA, the Minnesota Department of Transportation (Mn/DOT) has successfully completed its first experimental high-performance concrete pavement (HPCP) project under the Testing and Evaluation Program (TE-30). This project is one of the 22 projects funded under the TE-30 Program. With a structural design life of 60 years, this HPCP is unique in that it incorporates significant changes to the existing Mn/DOT specifications on concrete materials. Some of the new materials-related specifications developed as a part of this project are based on performance criteria that influence long-term durability of the pavement structure. The background and considerations for selecting the new performance measures are discussed, and test results are presented that evaluate the practical feasibility of establishing and achieving the performance specifications.

The Fatigue Performance of High Performance Concrete Composite Girder

2019 ◽  
Author(s):  
C. Xu ◽  
B. Y. Zhang ◽  
Z. H. Hou
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Test Results ◽  
Normal Concrete ◽  
Bending Tests ◽  
Composite Girder ◽  
Tensile Performance ◽  
Negative Bending ◽  
The One ◽  
Push Out

<p>The application of high performance concrete has been increasingly concerned in the negative flexural region of steel‐concrete continuous composite girder because of its favorable tensile performance. However, the unclear cyclic and ultimate performance of a high performance concrete composite girder results to the problems which hinder the further application. In this case, a series of fatigue negative bending tests on HPC composite girders and fatigue push‐out tests on stud connectors in HPC were executed. The test results showed that the fatigue slip in the HPC composite girder was smaller than the normal concrete composite girder, and the fatigue life of stud in HPC was longer than the one in normal concrete. Meanwhile, according to the comparison between the stud fatigue live evaluations and test results, the AASHTO‐based evaluations were comparatively with larger safety redundancy, and JSCE was close to the test results but had smaller safety redundancy.</p>

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