HYSTERETIC RESPONSES COMPARISON OF NUMERICAL MODEL TO EXPERIMENTAL MODEL OF PRECAST CONCRETE BEAM COLUMN JOINT CONNECTION STRUCTURE

• Main Author: Muhardi Arifin, Aulia
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71772
• Institution: Institut Teknologi Bandung

The beam-column joint structure is a structural element that is very important in the load transfer mechanism to the structure so that the inhomogenity contained in the precast concrete beam-column joint structure becomes a crucial problem. Several researches related to the precast concrete beam-column joint connection were carried out to answer this problem. Three beam-column joint connection models were selected, namely Zuohua, Lu, and Ghayeb models to review their hysteretic responses numerically because these researches have the most complete experimental information. Numerical modelling through finite element software (LS DYNA) is used to conduct this precast concrete beam-column joint connection. This research is about verification of the numerical model‘s hysteretic response to the experimental model’s hysteretic response using the constitutive material model that has been previously studied. The Winfrith concrete material model is a Smeared Crack Model type was chosen as the concrete material model and the bilinear steel model was chosen as the steel material model. The confinement effect is also considered according to Mander’s research. The bondslip effect between concrete and steel reinforcement was ignored in this research. The simulation results shows that the numerical model’s hysteretic responses errors of the Zuohua, Lu, and Ghayeb structural model are 13.44%, 50.2%, and 71.73%. Relatively small errors are found in the Zuohua strucure becasuse the dissipation energy of this structure is dominated by high ductility steel material, while relatively large errors are found in the Lu and Ghayeb structures because the dissipation energy is dominated by the concrete material. The absence of the bondslip effect is the main cause of the very large hysteretic responses errors in the concrete material model. There is a slight pinching effect on the hysteretic curve from the Winfrith concrete formulation without considering the bondslip effect. Non-dimensional energy capacity analysis and energy coefficient experimental results are calculated as quatitative values that used to compare the seismic performace of precast concrete beam column joint connection structures which are the samples of the literature study.