Hybrid Precast Concrete Column and Sandwich Concrete Beam under Static Loading

Akmaluddin,; Murtiadi, Suryawan

doi:10.1016/j.proeng.2013.03.026

Cited by 6 publications

(7 citation statements)

References 3 publications

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“…The objective of this section is to study the mechanism by which the structure sustains the applied load at elevated temperature [16,17]. The comparison is made between Case 1 at condition before fire and Case 2 at elevated temperature when the thermal expansion is taken into account.…”

Section: Load Carrying Mechanismmentioning

confidence: 99%

Constitutive Model of Concrete Frame Structure Under Localized Fire Simulations

Murtiadi¹,

Mahendra²,

Karyawan³

et al. 2022

Proceedings of the First Mandalika International Multi-Conference on Science and Engineering 2022, MIMSE 2022 (Civil and Archit

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In recent decades, special considerations have been given to the use of fire safety analysis on modern concrete buildings. The considerations include the stability of building which providing sufficient time for the occupants to evacuate and for firefighting. This paper is mainly concerned with the performance of concrete frame structure exposed to localized fire. From the simplified model, load carrying mechanism of concrete frame is identified and several design implications are discussed. Frame model in present analyses constructed of normal-strength reinforced concrete beams and high-strength reinforced concrete columns represented typical commercial office building. All elements of the frame are modeled using 3D tetrahedral coupled-field solid element defined by ten nodes with four degree of freedom. Temperature response predicted from previous researchers and loadings represented total design load at the fire limit state are applied. Constitutive model in a full thermal strain-stress analysis is employed on simple empirical formula. Three-dimensional finite element computer model using ANSYS considering transient effects gave reasonable results. The results indicate that behavior of individual isolated member accommodated by the current codes is different from the behavior of complete structure. Therefore, developing fire engineering analysis from the behavior of complete structures is strongly recommended.

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Section: Load Carrying Mechanismmentioning

confidence: 99%

Constitutive Model of Concrete Frame Structure Under Localized Fire Simulations

Murtiadi¹,

Mahendra²,

Karyawan³

et al. 2022

Proceedings of the First Mandalika International Multi-Conference on Science and Engineering 2022, MIMSE 2022 (Civil and Archit

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show abstract

“…[18] Considering the uncertainness of the parameters influencing the damage representation in the simulation and according to the energy equivalence principle of Sidiroff, [19] the residual elastic energy generated by the stress acting on the damaged material equals to that in the non-destructive material. Thus, the damage factor of concrete can be expressed by Equation (5),…”

Section: Constitutive Model Of Each Phase In Fgcmentioning

confidence: 99%

“…[4] The hybrid FGC, composed of the normal weight concrete (NWC) and the ceramsite lightweight aggregate concrete (LWAC), can effectively integrate the advantages of both types of concrete together. Akmaluddin et al [5] discussed the connection behavior of the hybrid precast concrete column and the sandwich concrete beam under the static loading. Ji et al [6] analyzed the variation of the mid-span deflection of the composite beam composed of the reactive powder concrete (RPC) and normal weight concrete (NWC) considering the influence of the prestressing degree, the RPC height and the NWC strength; the higher the pre-stressing degree, the longer the elastic stage before the crack, and the faster the stiffness in strengthening stage decreases after yielding.…”

Section: Introductionmentioning

confidence: 99%

Mesoscopic Finite Element Simulation on the Interfacial Bonding Performance of Functionally Gradient Concrete

Jian‐min¹,

Fan²,

Zhu³

et al. 2020

ES Mater. Manuf.

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To study the bonding shear performance of the casting interface in the functionally gradient concrete (FGC), a multiphase mesoscopic finite element modeling method was proposed to simulate a sandwich FGC specimen with the normal weight concrete (NWC) cast on the hardened ceramsite lightweight aggregate concrete (LWAC) layer. Four kinds of phases are considered during modeling: coarse aggregates, mortar substrate, interface transition zone (ITZ) between the mortar and coarse aggregates, and the casting interface transition zone (C-ITZ). Each phase in the model is endowed with the respective material property based on the constitutive damage plastic model (CDP). The structural characteristics of the C-ITZ that are related to the casting construction of the FGC are fully considered in the proposed modeling method. Based on the verification by corresponding experiments, the internal damage is developed, and the failure mechanisms of the FGC model are effectively reflected by the simulation. For the designed FGC specimen corresponding to the experiment, the weak position is proved to be located on the C-ITZ. The damage development and damage characteristics of the given FGC specimen are more related to the casting interval time of the FGC.

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“…The basis for the present study is to require special consideration by the designer for fire safety in buildings [7,8]. Since concrete is a good insulator and a non-combustible material, this also applies to concrete structures which conventionally have a favorable position in the building industry [9][10][11][12]. Consequently, the understanding of its behavior under elevated temperature is necessary for safe design and reliable analysis.…”

Section: Introductionmentioning

confidence: 99%

Performance of Concrete Building Structure Exposed to Localized Fire

Murtiadi¹,

Akmaluddin²

2023

cea

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Concrete structures have a favorable position in the building industry with regard to their performance of fire resistance. The understanding of their behavior is essential for reliable analysis and design. This paper is mainly concerned with concrete building performance subjected to localized fire arrangement. Special attention has been given to the finite element model of a seven-story concrete building representing a typical commercial office building designed to European Standard. Very large displacements happened on horizontal direction of the floor slabs due to thermal expansions. The large displacement induced lateral movement of the floor slabs and created additional moments to external columns. Design engineers should ensure that the external columns have ability to accommodate lateral displacements during fire. Although, the thin external columns of the model can withstand these movements due to beneficial effect of membrane action developed to the floor slabs. Present analysis indicates that the performance of the whole structure is substantially different from the single isolated structural member behavior during fire. Although the current design procedures are conservative, design engineers have to consider the detrimental and beneficial effects of lateral slabs' thermal expansion in complete structure.

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Hybrid Precast Concrete Column and Sandwich Concrete Beam under Static Loading

Cited by 6 publications

References 3 publications

Constitutive Model of Concrete Frame Structure Under Localized Fire Simulations

Constitutive Model of Concrete Frame Structure Under Localized Fire Simulations

Mesoscopic Finite Element Simulation on the Interfacial Bonding Performance of Functionally Gradient Concrete

Performance of Concrete Building Structure Exposed to Localized Fire

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