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Structural Engineering and Mechanics Volume 63, Number 1, July10 2017 , pages 77-88 DOI: https://doi.org/10.12989/sem.2017.63.1.077 |
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Simplified sequential construction analysis of buildings with the new proposed method |
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Mohammad Jalilzadeh Afshari, Ali Kheyroddin and Majid Gholhaki
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| Abstract | ||
| Correction Factor Method (CFM) is one of the earliest methods for simulating the actual behavior of structure according to construction sequences and practical implementation steps of the construction process which corrects the results of the conventional analysis just by the application of correction factors. The most important advantages of CFM are the simplicity and time-efficiency of the computations in estimating the final modified forces of the beams. However, considerable inaccuracy in evaluating the internal forces of the other structural members obtained by the moment equilibrium equation in the connection joints is the biggest disadvantage of the method. This paper proposes a novel method to eliminate the aforementioned defect of CFM by using the column shortening correction factors of the CFM to modify the axial stiffness of columns. In this method, the effects of construction sequences are considered by performing a single step analysis which is more time-efficient when compared to the staged analysis especially in tall buildings with higher number of elements. In order to validate the proposed method, three structures with different properties are chosen and their behaviors are investigated by application of all four methods of: conventional one-step analysis, sequential construction analysis (SCA), CFM, and currently proposed method. | ||
| Key Words | ||
| sequential construction analysis (SCA) or staged analysis; conventional one-step analysis; differential column shortening; correction factor method (CFM); modified CFM; construction sequence | ||
| Address | ||
| Faculty of Civil Engineering, Semnan University, Semnan, Iran | ||