Numerical Modeling On Varying Patch Repair Size of Cracked Beam Using Engineering Cementitious Composites
Martyana Dwi Cahyati(a)(b), Wei-Hsing Huang(a*), Hsieh Lung-Hsu (a)
a) Civil Engineering Department, National Central University, Zhongda Road No.300, Taoyuan City 320, Taiwan
*t321655[at]ncu.edu.tw
b) Civil Engineering Department, Universitas Muhammadiyah Yogyakarta, Bantul, Daerah Istimewa Yogyakarta 55183, Yogyakarta, Indonesia
Abstract
Engineered Cementitious Composites (ECC) is the cementitious based mortar that contains the specially selected PVA fiber having high tensile strength. ECC has been known to exhibit high ductility, high tensile strength, and improved durability performance. Thus, ECC is suitable as repairing material for patching cracked beam. This study investigated about repairing cracked beam using ECC with different types of patching and the results are compared with repairs made by conventional concrete. Numerical analysis was conducted on a simply supported cracked beam with a dimension of 200x25x15 cm using Abaqus software. Behaviour of concrete and ECC in the simulation are described as concrete damage plasticity model. Linear elastic-plastic model was used to represent the behavior of rebar steel. The type of patching consisted of varying ratio of lengths and depths, including patching length to total length ratios of 0.2, 0.3, and 0.4, and patching depth to total depth ratios of 0.2, 0.3, 0.4, and 0.5. Results show that variations in the patching length and depth ratios affect the maximum flexural load, stiffness, and ductility of the repaired beam. It was also found that repairing the cracked beam using ECC provides higher flexural load of the beam than the use of conventional concrete, due to the superior tensile strength of ECC.
Keywords: Numerical Modeling, ECC, Repair, Patching, Cracked Beam
Topic: International Symposium of Civil, Environmental, and Infrastructure Engineering