A Detailed Finite Element Analysis of Internal Forces and Serviceability in a High-Rise RC Building: A Case Study in Vietnam

Abstract

The accurate prediction of internal forces is paramount for the safe and efficient design of high-rise reinforced concrete (RC) structures. This study presents a comprehensive finite element analysis of a ten-story RC building in Vietnam, focusing on internal forces, serviceability limits, and reinforcement design compliant with TCVN 5574:2018. A detailed three-dimensional model was developed in ETABS, incorporating dead, live, wall, and wind loads. The analysis confirmed that the structural system satisfies the code's lateral drift requirement, with a maximum roof displacement of 0.088 m being less than the allowable limit of h/500 (0.076 m). Critical internal forces were identified, revealing a maximum negative moment of 537.38 kNm at a first-floor beam support—44% higher than the maximum mid-span moment—highlighting the necessity for distinct reinforcement detailing at supports. Column C29, for instance, was subjected to an axial load of -6092 kN and a significant uniaxial moment of -258.47 kNm, characteristic of an edge column. Reinforcement designs for beams and columns were derived and found to be within code-specified limits. This case study demonstrates the efficacy of finite element modeling for the design of multistory buildings and provides a validated, practical reference for engineers applying TCVN standards in similar regional contexts.