Abstract
Research with numerical methods using computer programs has increased in recent years in various fields including the field of structural materials. However, this numerical analysis still needs to be developed in terms of modeling techniques in order to get the results according to the real condition. In this paper, modeling of concrete-cylinder with numerically method using a finite element based computer program, Abaqus®, presented.. Modeling technique to inventigate the mesh element technique and the reduced integration on hourglass control. Modeling specimen is in the form of cylindrical concrete measuring 150 mm x 300 mm with a quality of 25 MPa. Concrete plastic behavior is modeled with the concrete damage plasticity (CDP) feature. The results of the analysis show that the reduction-integration of hourglass control gives a lower peak load effect when the material passes the elastic limit. Meanwhile, a better mesh technique is to use 8-noded hexahedral because it is more stable and the reduction-integration effect of hourglass control can work.
Highlights
PENDAHULUAN Beton merupakan salah satu jenis material yang paling banyak digunakan sebagai bahan struktur bangunan
This paper presents the modeling of a concrete cylinder with a numerical method using a finite element-based computer program, Abaqus®
‘Finite element analysis of punching shear of R/C slabs: A hybrid approach for model calibration’, in Proceedings of the fib Symposium
Summary
Benda uji dimodelkan pada program Abaqus® versi 6.14-01 dengan fitur CDP untuk definisi kekuatan beton pasca kondisi elastis sebelum dan sesuada beban puncak. Beban diberikan berupa gaya aksial melalui pusat penampang silinder dan diberikan perletakan sendi pada ujung lainnya (Gambar 1). Permukaan atas diberikan perletakan sendi, dengan fitur rigid body point to surface, titik RP2 sebagai pusat penerima gaya pada suluruh penampang. Permukaan bawah diberikan gaya aksial, dengan fitur rigid body point to surface, titik RP1 sebagai titk pusat gaya dan disebarkan ke seluruh penampang. Untuk menyebarkan gaya pada seluruh penampang lingkaran melalui titik pusat beban, digunakan fitur rigid-body point to surface. Kurva tegangan regangan ini dibagi menjadi tiga (3) yaitu bagian linier ditentukan oleh E0 yang diambil sebesar 4700√f’c sampai batas 0,4f’c, kemudian setelah kondisi linier sampai titik puncak mengikuti Persamaan 1, dan terakhir kondisi setelah beban puncak hingga runtuh mengikuti Persamaan (2)
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