Performance of Laced Steel–Concrete Composite (LSCC) beams under monotonic loading

Anandavalli, N.; Lakshmanan, N.; Knight, G. M. Samuel; Iyer, Nagesh R.; Rajasankar, J.

doi:10.1016/j.engstruct.2012.03.033

Cited by 22 publications

(16 citation statements)

References 8 publications

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“…The ductility and shearing capacity of the traditional Reinforced Concrete (RC) beams were enhanced with the existence of conventional vertical stirrups. However, RC slabs were suffered from flexural-shear cracks under bending [1]. Laced reinforcement was considered as an alternative to traditional stirrups in concrete structural elements to reduces these cracks and enhance the integrity of the structure which exposed to dynamic loads such as blast and earthquake.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Behavior of One-Way Reinforced Concrete Slabs by Using Laced Reinforcement

Hallawi

Al‐Ahmed

2019

Civ Eng J

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This paper studies experimentally the behavior of laced reinforced concrete one-way slabs under monotonic load. The experimental program included testing three simply supported one-way slabs of dimensions (1500 mm length, 600 mm width, and thickness 130mm. One of these slabs was the control specimen which was designed without lacing reinforcement steel and the other two specimens designed were with two variable lacing reinforcement ratio (0.27% and 0.52%). All specimens were cast with normal of 22 MPa compressive strength. Specimens were tested under two equal line loads applied at the third parts of the slab (monotonic load) gradually applying up to failure. The specimens showed an enhanced in ultimate load capacity up to 40% as a result of increasing the lacing steel ratio to 0.52 %. Also, decreasing in deflection at service and at ultimate load levels by 42% and %57 respectively. In addition, the results showed that specimen with lacing reinforcement are more ductility than specimen without lacing reinforcement so using of lacing steel reinforcement leads to significant improvements in ductility index which reached to about 49% with increasing the lacing steel ratio to (0.52%).

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Section: Introductionmentioning

confidence: 99%

Enhancing the Behavior of One-Way Reinforced Concrete Slabs by Using Laced Reinforcement

Hallawi

Al‐Ahmed

2019

Civ Eng J

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“…Anandavalli et al [5] proposed a new method for displaying reinforced concrete structures which has been adopted to analyze a BLRC structures. "The approach assumed RC/LRC as a homogenous material, whose constitutive property is derived based on the moment-curvature relationship of the structural component.…”

Section: Introductionmentioning

confidence: 99%

The Performance of Self-Compacted High Strength Concrete Columns with Laced Steel Section

Majeet

Alshimmeri

2018

Civ Eng J

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In view of the great orientation to the steel buildings and the large role played by the columns in carrying and transferring the loads it is necessary to go to strengthen the steel rolled columns to meet the requirements of the architecture that witch is looking for large spacing. In present paper this research the objectives of this research can be summarized as following: prevent local buckling occurs in columns, strengthen the steel columns from the weak axis in a new methodology, to compare buckling loads of single lacing reinforcement versus double lacing reinforcement and obtain a high bearing column steel section with small surface area increase in column strength capacity. Different parameters are taking into account to investigate the behavior and strength of steel and composite columns such as slenderness ratio, and double lacings and presence of longitudinal reinforcement that parallel to the column height. The type of concrete that adopt is self-compact concrete with high compressive strength. The new and alternative method is were used to strengthen the steel rolled columns at low cost by strengthening the weak axis to preventing or minimize buckling of the columns by using high strength concrete self-compacted without main reinforcements with steel section columns reinforced by lacing as single and double so that it work as full composite structural element and there are connections between concrete block and steel column. There are five specimens with the same height of 1450 mm that was classified as the control specimen and the others with different parameters such as lacing configurations, presence of longitudinal dowels and presence of concrete subject to concentric load. All specimens except the control filled with self-compacted high strength concrete. The result showed that as increase in strength in presence of concrete as compared with the control specimen. Control specimen gave strength capacity compared with the others composite specimens; the increased are 50% composite column, 62.50% composite column with single lacing and 75.00% composite column with double lacing respectively. Specimen (CL1CDL2R) increased in strength capacity as compared with the control specimen 87.50% and 7.14% compared with specimen (CL1CDL) because of presence dowels along the specimen height that increase the stiffness of the composite column. Presence of single and double lacing reduced the buckling value because of reduced the effective columns height. Specimen (CC1L1) gave maximum buckling 32.00 mm compared with the others specimens such as CL1C), (CL1CSL), (CL1CDL) and (CL1CDL2R) respectively, there is significant difference in buckling that reduced by 17.19%, 28.13%, 45.31% and 55.63% respectively.

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“…Laced steel–concrete composite a (LSCC) system is a new type of SCS system [14]. Figure 1 shows the schematic view of the typical longitudinal section and cross-section of a LSCC beam.…”

Section: Introductionmentioning

confidence: 99%

“…Under transverse load, top cover plate experiences compression and bottom cover plate experiences tension. Lacings are found to be always in tension and the vertical concrete struts carry compression [14]. In the elastic range, the compressive forces in concrete above neutral axis and the top cover plate combine and form a couple with the tensile force in the bottom cover plate to resist the applied moment.…”

Section: Introductionmentioning

confidence: 99%

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Behaviour of steel–concrete–steel sandwich composite beams with lacing subjected to reversed cyclic loads

Anandavalli

Lakshmanan

Rajasankar

et al. 2017

Jnl of Sandwich Structures & Materials

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Steel–concrete–steel (SCS) sandwich composite system consists of steel plates covering both sides of the concrete core and connected by mechanical means such as shear connectors. In conventional steel–concrete–steel system, shear connectors are welded to the steel cover plates. Laced steel–concrete composite (LSCC) system is a new form of steel–concrete–steel, proposed earlier by the authors. In LSCC system, steel cover plates are connected in a novel way using lacings and cross rods and hence is devoid of welding. Proposed sandwich composite system is being evaluated systematically for its structural behaviour under various modes of loading for use in special structures under severe loading such as blast loading. Damage under cyclic loading and energy absorption are extremely important, which are highlighted in this paper. An experimental investigation on the cyclic response behaviour of two LSCC beams is carried out. Angle of lacing is the parameter that is varied between the two beams. Both the beams are found to exhibit similar behaviour on most of the aspects. The envelope of hysteretic response indicates mild softening behaviour after reaching peak value. Maximum load resisted under both sagging and hogging moment conditions is found to be nearly equal, thus making the LSCC system suitable for situations where reversal of loads are encountered. Dissipated energy is observed to be nearly the same for the load applied in the upward as well as in the downward direction. Analytical prediction on energy absorption capacity is carried out by adopting a hysteretic model with strength deterioration. Cyclic ductility factor is evaluated to be about 20 for LSCC beams, while support rotation is calculated to be about 8° and 10° for beams with 45° and 60° angles of lacing, respectively. Spalling of concrete is prevented in LSCC beams by the steel cover plates.

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Performance of Laced Steel–Concrete Composite (LSCC) beams under monotonic loading

Cited by 22 publications

References 8 publications

Enhancing the Behavior of One-Way Reinforced Concrete Slabs by Using Laced Reinforcement

Enhancing the Behavior of One-Way Reinforced Concrete Slabs by Using Laced Reinforcement

The Performance of Self-Compacted High Strength Concrete Columns with Laced Steel Section

Behaviour of steel–concrete–steel sandwich composite beams with lacing subjected to reversed cyclic loads

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