An experimental study into the evolution of loads on shores and slabs during construction of multistory buildings using partial striking

Alvarado, Yezid A.; Calderón, Pedro A.; Adam, José M.; Payá-Zaforteza, Ignacio; Pellicer, Teresa M.; Pallarés, Francisco J.; Moragues, Juan J.

doi:10.1016/j.engstruct.2009.03.021

Cited by 27 publications

(53 citation statements)

References 4 publications

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“…For example, one of the currently most used methods to measure loads on shores and slabs is Grundy & Kabaila's (1963) simplified method [7], which is easy to apply and in most cases errs on the side of safety. However, later studies by other authors such as Liu et al [8], Stivaros & Halvorsen [9], Chen Mosallam [10], Duan & Chen [11], Moragues et al [4], Fang et al [12], Beeby [13] and Alvarado et al [5] agree that Grundy & Kabaila's simplified method [7] overestimates the loads on shoring, mainly due to the fact that the latter authors consider shores to be infinitely stiff. This factor is crucial in considering the effects of clearing, as pointed out by Alvarado et al [6] , Alvarado [14] and Calderón et al [15].…”

Section: Introductionmentioning

confidence: 82%

“…Two PCs with software developed by ICITECH personnel were used for data handling and were installed in an adjacent building. For a detailed description of the experimental study, see Alvarado et al [5] and Alvarado [14]. LVDT Nº 5 showed inverse behaviour, due to the fact that it was located near to the edge of the cantilever.…”

Section: Description Of the Experimental Buildingmentioning

confidence: 99%

“…For the experimental study, the building described by Alvarado et al [5] and Alvarado [14], in Valencia, Spain, was used, as well as two other buildings, in which temperature evolution was measured in the interior of the floor slabs. These other buildings were situated in Valencia (at a short distance from the experimental building) and Sabadell, Spain, (with a climate very similar to Valencia).…”

Section: Experimental Studymentioning

confidence: 99%

“…The present study analyses the effect of temperature on the load distribution on shores, for which the results of an experimental building studied by Alvarado et al [5], built according to the shoring-clearingstriking process, are used. In his experiment work, Alvarado [14] detected the importance of ambient temperature variations on shore loads during the building process.…”

Section: Introductionmentioning

confidence: 99%

“…It consists of reducing the number of support components by removing, some days after pouring, the formwork and over 50% of the shores that support the floor slabs, while ensuring that the remaining shores stay in contact with the structure. To date, few authors have studied the clearing technique, and only Moragues et al [4] and Alvarado et al [5,6] have carried out experimental and theoretical studies on its application. Other theoretical and experimental studies on load transmission between shores and slabs have not taken the clearing technique into consideration.…”

Section: Introductionmentioning

confidence: 99%

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Temperature effects on load transmission between slabs and shores

Gasch

Alvarado

Calderón

2012

Engineering Structures

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This paper analyses the influence of temperature changes on load transmission between floor slabs and shores during the in situ casting of concrete slabs by the shoring-clearing-striking method. Therefore several experimental studies were carried out which measured both the internal temperature evolution of the slabs and the loads on the shores. With the results of these studies, a Finite Element Model (FEM) of an experimental structure was then developed. In both the FEM and the experimental studies the same behaviour was observed regarding changes in temperature. When temperatures rose, the loads on shores decreased, accompanied by a reduction in slab deflection. When temperatures dropped, the loads on the shores increased, accompanied by an increased slab deflection. In the experimental study, for a temperature increment of ±1ºC the load per surface unit on shores varied between 0.13 kN/m 2 and 0.34 kN/m 2 , which represents between 2% and 6% of the self-weight of the slabs. The main cause of these load variations appears to be the temperature gradient inside the floor slabs.

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Section: Introductionmentioning

confidence: 82%

Section: Description Of the Experimental Buildingmentioning

confidence: 99%

Section: Experimental Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Temperature effects on load transmission between slabs and shores

Gasch

Alvarado

Calderón

2012

Engineering Structures

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Estimating loads on shores during the construction of RC building structures

Buitrago

Adam

Calderón

et al. 2016

Structural Concrete

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When constructing reinforced concrete (RC) building structures, knowing the loads to which the shoring system will be subjected during the entire process is one of the key aspects for ensuring safety during the work. Although various simplified methods of estimating the load transmission between shores and slabs during construction have been proposed to date, none of these methods can estimate the loads on individual shores during the different construction phases. This paper proposes a calculation method that allows the loads on individual shores to be calculated for each construction phase without having to resort to the use of advanced software. The proposal was validated by comparison with the results obtained from two actual buildings under construction and represents a step forward in the construction of RC building structures, as it is the first method that offers the possibility of estimating the loads acting on each shore during all the construction phases.

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Staged‐construction analysis of high‐rise buildings: A literature review and future perspectives

Elansary

Mabrouk

El-Attar

2023

Structural Design Tall Build

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SummaryStaged‐construction analysis (SCA) has recently become a noticeable trend for estimating the design forces and deformations for high‐rise buildings (HRBs). SCA is a nonlinear step‐by‐step analysis that simulates the construction activities and conditions. It is a numerical simulation that considers loading history during construction, time‐dependent material behavior, environmental conditions, and any special measures taken by contractors to limit differential axial shortening during the construction process. However, building codes and guidelines do not provide adequate provisions that clearly identify how to approach this type of analysis. This paper presents a comprehensive state‐of‐the‐art review on how SCA was previously adopted in theoretical research and how it was applied in real buildings. It begins by critically reviewing different research work on SCA. Afterward, the paper puts forward the recent fundamentals of conducting SCA. Then, a series of studies about verifying SCA as practical analysis procedure using field measurements are then presented. In addition, the current paper reviews how SCA can specifically affect post‐tension slabs. Based on this review, several recommendations are provided to help in shaping the future code provisions, add to the development of recent practices, and inspire future research. The conducted review concludes that more investigations should be performed to better understand the effect of considering SCA on the deformations and design forces during HRB analysis.

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An experimental study into the evolution of loads on shores and slabs during construction of multistory buildings using partial striking

Cited by 27 publications

References 4 publications

Temperature effects on load transmission between slabs and shores

Temperature effects on load transmission between slabs and shores

Estimating loads on shores during the construction of RC building structures

Staged‐construction analysis of high‐rise buildings: A literature review and future perspectives

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