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Pengaruh Pemodelan Zona Terkekang Terhadap Prediksi Hubungan Momen-Kurvatur Kolom Persegi Beton Mutu Tinggi

Authors: Iswandi Imran; Remigildus Cornelis;

Pengaruh Pemodelan Zona Terkekang Terhadap Prediksi Hubungan Momen-Kurvatur Kolom Persegi Beton Mutu Tinggi

Abstract

Paper ini mengkaji salah satu aspek yang berkaitan dengan pemodelan daerah terkekang pada kolom persegi beton mutu tinggi yang diberi beban aksial tekan eksentrik. Cakupan daerah terkekang pada penampang kolom adalah parameter yang dikaji untuk melihat pengaruhnya terhadap prediksi analitis kekuatan dan daktilitas kolom. Beberapa pemodelan daerah terkekang yang sering digunakan dalam berbagai literature dievaluasi untuk mengetahui karakteristik dan sensitivitasnya. Selanjutnya dalam paper ini dikembangkan program komputer MOKUR2D untuk menganalisis hubungan momen-kurvatur kolom persegi beton mutu tinggi. Dalam program, cakupan daerah terkekang pada penampang kolom dapat dimodelkan dengan tiga pendekatan, yaitu pendekatan model konvensional yang menggunakan koefisien kekangan efektif, model dengan daerah arching action yang tak terkekang dan model penampang dengan tiga variasi derajat kekangan yang berbeda. Studi perbandingan dengan menggunakan program tersebut kemudian dilakukan terhadap 4 buah kolom yang diuji oleh Sheikh dan Bayrak [1998]. Semua kolom tersebut berdimensi 305 x 305 mm, dengan delapan tulangan longitudinal berdiameter 19.5 mm yang terdistribusi merata pada penampang. Tegangan leleh tulangan baja yang digunakan adalah 454 MPa. Dua tipe konfigurasi sengkang yang dikaji masing-masing adalah sengkang diamond dan konvensional dengan volumetric ratio berkisar antara 1.68 hingga 5.24 persen. Spasi tulangan sengkang yang terpasang berkisar antara 90 mm hingga 108 mm. Hasil analisis menunjukkan bahwa pemodelan daerah terkekang dengan model konvensional masih cukup akurat walaupun sedikit overestimate terhadap hasil eksperimen sedangkan model dengan tiga variasi derajat kekangan terlihat memiliki akurasi respon teoritis momen kurvatur yang lebih baik dan sangat mendekati hasil eksperimen jika kekangan pada daerah arching action ditetapkan sebesar 50% dari kekangan pada inti kolom.

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Keywords

Hubungan momen-kurvatur, Kolom persegi beton mutu tinggi, kekuatan, hubungan momen-kurvatur, daktilitas, Model daerah terkekang, TA1-2040, Daktilitas., Engineering (General). Civil engineering (General), Kekuatan, model daerah terkekang, kolom persegi beton mutu tinggi

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold