Maximum loads on shores during the construction of buildings

This paper describes a simplified method of estimating maximum loads on shores during the construction of multistorey buildings with in situ casting. Calculating this maximum value is fundamental to establish the design load of the shores and thus avoid possible safety problems caused by selecting the wrong type of shore. The procedure was verified and showed a good fit with both the experimental measurements and finite-element method calculations. This simplified procedure will be useful to both researchers and practitioners, who have to deal with this problem in the course of their daily work. The proposal also represents an important technology transfer to the industry as it is in the form of a simplified tool that comes fairly close to the results obtained by complex calculation methods. Actually, the maximum load obtained from the simplified method is 20·72 kN, which is very close to the value 21·37 kN obtained from an advanced finite-element model.

[1]  Andrew Scanlon,et al.  Practical Calculation of Two-WaySlab Deflections , 1982 .

[2]  Dong-Ping Fang,et al.  On-Site Measurement of Load Distribution in Reinforced Concrete Buildings During Construction , 2001 .

[3]  Salvador Ivorra,et al.  Construction loads using a shoring–clearing–striking process , 2014 .

[4]  D Kaminetzky,et al.  Early-Age Concrete: Construction Loads, Behavior, and Failures , 1994 .

[5]  Kenneth L. Carper,et al.  Design and Construction Failures: Lessons from Forensic Investigations , 1991 .

[6]  Isabel Gasch.  Estudio de la evolución de cargas en forjados y estructuras auxiliares de apuntalamiento durante la construcción de edificios de hormigón in situ mediante procesos de cimbrado, clareado y descimbrado de plantas consecutivas , 2012 .

[7]  Jose M. Adam,et al.  A new simplified procedure to estimate loads on slabs and shoring during the construction of multistorey buildings , 2011 .

[8]  Alvarado Vargas,et al.  Estudio experimental y numérico de la construcción de forjados hormigonados in situ mediante un proceso de cimbrado, clareado y descimbrado de plantas consecutivas. , 2011 .

[9]  Yezid A. Alvarado,et al.  Transmisión de cargas entre forjados y puntales en un edificio de forjado reticular de casetón perdido utilizando clareado , 2013 .

[10]  Jose M. Adam,et al.  Improving construction processes of concrete building structures using load limiters on shores , 2015 .

[11]  Jose M. Adam,et al.  An experimental study into the evolution of loads on shores and slabs during construction of multistory buildings using partial striking , 2009 .

[12]  Mark G. Stewart,et al.  Structural Reliability of Multistory Buildings during Construction , 2002 .

[13]  F. Cussigh,et al.  Using the maturity method in concrete cracking control at early ages , 2004 .

[14]  Jose M. Adam,et al.  A study of the conditions of use of a new safety system for the building industry , 2007 .

[15]  Jose M. Adam,et al.  A numerical study into the evolution of loads on shores and slabs during construction of multistorey buildings. Comparison of partial striking with other techniques , 2010 .

[16]  Paul Grundy,et al.  Construction Loads on Slabs with Shored Formwork in Multistory Buildings , 1963 .