Measured Shortening and Its Effects in a Chicago High-Rise Building

Bast, William D.; McDonnell, Terry R.; Parker, Lance; Shanks, Steven P.

doi:10.1061/40692(241)55

Cited by 9 publications

(20 citation statements)

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“…The differential axial shortening of vertical members may not affect these elements to any great extent; however, horizontal elements, such as beams and slabs, can be severely affected. [124][125][126] Therefore, the vertical displacement (or settlement) of the foundation and superstructure has been a primary concern of the structural condition throughout the construction stage. 30 Strain monitoring of main structural components is essential for the construction of high-rise structures.…”

Section: Generalmentioning

confidence: 99%

“…Moreover, the constructed structure may deviate from the design because the structural system, material properties, loads and actions in the construction phase are time‐varying and totally different from those in the service phase. The differential axial shortening of vertical members may not affect these elements to any great extent; however, horizontal elements, such as beams and slabs, can be severely affected 124–126 . Therefore, the vertical displacement (or settlement) of the foundation and superstructure has been a primary concern of the structural condition throughout the construction stage 30 .…”

Section: In‐construction Monitoringmentioning

confidence: 99%

See 1 more Smart Citation

Review on field monitoring of high‐rise structures

Xia

Weng

2020

Struct Control Health Monit

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Structural health monitoring (SHM) has been developed and applied to bridge structures since the early 1980s. Numerous approaches and techniques have been proposed and applied to supertall structures during the recent decade. This paper reviews the SHM techniques and applications in supertall structures. The vibration analysis techniques, seismic effect monitoring, wind effect monitoring, comfort assessment, temperature effect monitoring, and construction monitoring of high-rise structures are described and summarised. The latest developments in codification and standardisation in SHM are also introduced.

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Section: Generalmentioning

confidence: 99%

Section: In‐construction Monitoringmentioning

confidence: 99%

Review on field monitoring of high‐rise structures

Xia

Weng

2020

Struct Control Health Monit

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“…This differential shortening can deteriorate the quality of construction by causing slab distortions, separation of elevator guiderail brackets, unexpected deformation of interior drywalls, and damage to cladding systems [ 2 , 3 ]. In practice, to minimize the effect of differential shortening on structural and nonstructural elements, compensation for the estimated differential shortenings is made during construction [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

“…For a proper compensation of differential shortening [ 7 , 8 ], the comparison between measured and estimated shortenings is made at selected floor levels, where strain sensors are installed, throughout the height of the building. There have been many cases in which the amount of shortening was measured in the process of constructing actual high-rise buildings [ 2 , 9 – 13 ]. As shown in Figure 1 , conventional field sensing systems for measurement of column shortenings during construction may fall into three categories.…”

Section: Introductionmentioning

confidence: 99%

Field Monitoring of Column Shortenings in a High-Rise Building during Construction

Choi

Kim

Kim³

et al. 2013

Sensors

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The automatic monitoring of shortenings of vertical members in high-rise buildings under construction is a challenging issue in the high-rise building construction field. In this study, a practical system for monitoring column shortening in a high-rise building under construction is presented. The proposed monitoring system comprises the following components: (1) a wireless sensing system and (2) the corresponding monitoring software. The wireless sensing system comprises the sensors and energy-efficient wireless sensing units (sensor nodes, master nodes, and repeater nodes), which automate the processes for measuring the strains of vertical members and transmitting the measured data to the remote server. The monitoring software enables construction administrators to monitor real-time data collected by the server via an Internet connection. The proposed monitoring system is applied to actual 66-floor and 72-floor high-rise buildings under construction. The system enables automatic and real-time measurements of the shortening of vertical members, which can result in more precise construction.

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“…A Figura IV-15 mostra o resultado obtido pelos autores para os deslocamentos ao longo do tempo do 45º pavimento. Traduzido deBAST et al (2003).BAST et al concluem que o modelo e hipóteses adotados foram satisfatórios em relação aos deslocamentos medidos. Eles recomendam ajustes na concretagem dos pavimentos para compensar os futuros deslocamentos dos pilares, além de métodos de prevenções nos sistemas não estruturais, como juntas no encanamento que permitam movimentações verticais das tubulações.…”

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Encurtamento de pilares de concreto armado e a influência do processo construtivo.

Fortes¹

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The present study adress the issue of column shortening during the construction. These deformations are due to the progression of loads, due to creep and due to shrinkage. Shortenings cause displacements, that are partially compensated by the construction process, either the construction is performed with the floors executed at the design level, or the construction executed with fixed floor-to-floor dimension. Thus, the final displacement is lower than the displacement obtained by a single-step model, that considers all actions taking place after the structure is finished. A methodology for the estimation of shortenings and corrections is proposed and the results obtained from this methodology are validated through comparisons with computational models. In addition, a fictitious temperature load is proposed to simulate the constructive corrections in the single-step model. The temperature variation proved to be simple, accurate and useful in the analysis of multi-storey buildings. Finally, the possible damages in non-structural elements and ways to mitigate this problem are discussed.

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Measured Shortening and Its Effects in a Chicago High-Rise Building

Cited by 9 publications

References 0 publications

Review on field monitoring of high‐rise structures

Review on field monitoring of high‐rise structures

Field Monitoring of Column Shortenings in a High-Rise Building during Construction

Encurtamento de pilares de concreto armado e a influência do processo construtivo.

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