Lightweight steel–concrete–steel sandwich composite shell subject to punching shear

Huang, Zhenyu; Wang, Junyan; Liew, J.Y. Richard; Marshall, Peter

doi:10.1016/j.oceaneng.2015.04.054

Cited by 48 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LWAC also reduces the transportation and hoisting cost during construction, the gravity load on the foundation, thus the reinforcement and labor cost [1][2][3][4][5][6][12][13][14][15]. Due to the superior performance of LWAC, it has been used in, e.g., bridges [16], prefabricated construction [17] and offshore structures [18]. To further reduce the self-weight of offshore structures, Huang et al [3,4], Chia et al [19] and Wu et al [20] developed a novel ultralightweight cement composite (ULCC) using fly ash cenospheres.…”

Section: Introductionmentioning

confidence: 99%

“…The apparent density of the ULCC is only 1450kg/m 3 with a 28-day compressive strength of 60MPa. To further downsize the design, they developed a novel steel-ULCC-steel sandwich composite [21], and studied the bending, shearing, compression and dynamic impact resistance of beams, plates, shells and walls made of the sandwich composite experimentally and theoretically [15,18,[21][22][23][24]. A set of design methods were also proposed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Huang

Sui

Wang

et al. 2020

Composite Structures

View full text Add to dashboard Cite

This paper develops a novel rubberized ultra-lightweight high ductility cement composite (RULCC) with added rubber powder and low content PE fiber (0.7%), and investigates the dynamic compressive response and failure mechanism of the RULCC both experimentally and analytically. The test program examines the dynamic compressive stress-strain relationship of the RULCC through Split Hopkinson Pressure Bar (SHPB) impact tests. The results show that the rubber powder aggregates have significant effect on the compressive strength, stress-strain relations and failure mechanism of the RULCC. A volume replacement of fine aggregates with 5%, 10% and 20% rubber power results in a reduction in static compressive strength by 29.5%, 47.7% and 60.3%, respectively. The RULCC with a low fiber content of 0.7% in volume exhibits a 3% direct tensile strain, and a 4-5% tensile strain can still be achieved after 10% rubber powder is added to the RULCC, showing a high ductility of the material. The SHPB impact test shows that the compressive strength increases with strain rate. An empirical model, taking into account of the replacement ratio of the rubber powder aggregates in the RULCC, is developed in this paper to evaluate the Dynamic Increasing Factor (DIF). The experimental and analytical studies are essential to better understand the fundamental dynamic behavior of the RULCC for its further applications in engineering applications, such as protective structures, etc.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Huang

Sui

Wang

et al. 2020

Composite Structures

View full text Add to dashboard Cite

show abstract

“…SCS is a special form of composite system that originated in civil engineering applications and was extended to many other applications including marine structures and nuclear power plants [1,2]. This structural system provides many structural and economical features compared to conventional reinforced concrete and steel structural systems [3][4][5][6] such as (1) higher flexural stiffness, energy absorption, impact and blast resistance, and thermal and acoustic insulation, (2) relatively lower fabrication cost and time as the components can be assembled in a modular construction fashion with less need for formwork, and (3) easy inspection and maintenance for the substrate concrete and steel plates. One form of an SCS element is an SCS beam, which takes advantage of both concrete compression performance and steel tension performance.…”

Section: Introductionmentioning

confidence: 99%

“…The stud-end shape did not affect the beam ultimate load capacity. Huang et al [5] tested SCS sandwich shell beams subjected to static monotonic concentrated loading. The cores were made out of ULWCC and the connectors were headed shear studs.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Performance of Steel–Concrete–Steel Sandwich Beams with Rubcrete and LECA Concrete Core

et al. 2019

View full text Add to dashboard Cite

Due to the structural and economic features of steel–concrete–steel (SCS) structural systems compared with conventional reinforced concrete ones, they are now used for a range of structural applications. Rubcrete, in which crumbed rubber from scrap tires partially replaces mineral aggregates in concrete, can be used instead of conventional concrete. Utilizing rubber waste in concrete potentially results in a more ductile lightweight concrete that can introduce additional features to the SCS structural members. This study aimed to explore different concrete core materials in SCS beams and the appropriate shear connectors required. In this study, four SCS sandwich beams were tested experimentally under incrementally increasing flexure cyclic loading. Each beam had a length of 1000 mm, and upper and lower steel plates with 3 mm thickness sandwiched the concrete core, which had a cross-section of 150 mm × 150 mm. Two of the beams were constructed out of Rubcrete core with welded and bolted shear connectors, while the other two beams were constructed with welded shear connectors and either conventional concrete or lightweight expanded clay aggregate (LECA) concrete cores. The performance of the SCS sandwich beams including damage pattern, failure mode, load-displacement response, and energy dissipation behavior was compared. The results showed that, while Rubcrete was able to provide similar concrete cracking behavior and strength to that of conventional concrete, LECA concrete degraded the strength properties of SCS. Using bolted shear connectors instead of welded ones caused a high number of cracks that resulted in a reduced ductility and deflection capacity of the beam before failure. The rubberized concrete specimen presented an improved ductility and deflection capacity compared with its conventional concrete counterpart.

show abstract

“…Recent development on ultralightweight cement composite (ULCC) by Wu et al [ 26 ], Huang et al [ 27 , 28 , 29 , 30 , 31 , 32 ] showed that ULCC using fly ash cenospheres exhibited low density ranging from 1250 to 1550 kg/m 3 , high compressive strength up to 87.3 MPa, high flexural strength of 11.4 MPa, and deflection hardening behavior by using low steel fiber content (0.5% in volume) [ 33 ], which has been applied in steel–concrete–steel sandwich composite beams [ 27 , 30 ], walls [ 4 , 29 , 31 ], and shells [ 27 , 28 , 32 ] within marine offshore areas. As can be seen, use of lightweight fly ash cenospheres in cement-based composites has been an area of interest and a growing number of researchers investigate its mechanical and functional properties [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ] and promote its application subjected to different loading scenarios [ 27 , 28 , 29 , 30 , 31 , 32 , 41 ]. Cenospheres are lightweight (400–800 kg/m 3 ), high-strength (crushing strength up to 45 MPa), inert, hollow spheres made largely of silica and alumina and filled with air or inert gas, typically produced as a by-product of coal combustion at thermal power plants or artificial sintering method.…”

Section: Introductionmentioning

confidence: 99%

A Novel, Multifunctional, Floatable, Lightweight Cement Composite: Development and Properties

et al. 2018

View full text Add to dashboard Cite

This paper presents the development of a novel, multifunctional, floatable, lightweight cement composite (FLCC) using three different types of glass microspheres for structural engineering applications. Eight different mixtures of FLCC were produced and their matrix-related parameters were examined experimentally by adopting different types of microsphere fillers, fiber content (polyethylene fibers (PE)), and water-to-binder ratios. Along with the mechanical properties such as compressive, flexural, tensile strengths, and modulus of elasticity, the water tightness of the material was evaluated by sorptivity measurements and the energy efficiency by thermal conductivity. The optimal FLCC has an oven-dry density of 750 kg/m3, compressive strength (fcm) up to 41 MPa after 28-day moist curing, low thermal conductivity of 0.152 W/mK, and very low sorptivity. It is found that an optimized amount of PE fiber is beneficial for improving the tensile resistance and ductility of FLCC while a relatively large amount of microspheres can increase the entrapped air voids in the FLCC matrix and reduce its density and thermal conductivity. Microstructural analysis by scanning electron microscopy (SEM) reveals that the microspheres are distributed uniformly in the cement matrix and are subjected to triaxial compression confinement, which leads to high strength of FLCC. Segregation due to density difference of FLCC ingredients is not observed with up to 60% (by weight) of glass microspheres added. Compared to the other lightweight aggregate concretes, the proposed FLCC could be used to build floating concrete structures, insulating elements, or even load-bearing structural elements such as floor and wall panels in which self-weight is a main concern.

show abstract

Lightweight steel–concrete–steel sandwich composite shell subject to punching shear

Cited by 48 publications

References 21 publications

Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder

Cyclic Performance of Steel–Concrete–Steel Sandwich Beams with Rubcrete and LECA Concrete Core

A Novel, Multifunctional, Floatable, Lightweight Cement Composite: Development and Properties

Contact Info

Product

Resources

About