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ITS » Master Theses » Teknik Struktur S2
Posted by dewi007 at 14/11/2008 11:46:36  •  10245 Views


EFEKTIFITAS PENGEKANGAN FINE MESH PADA KOLOM BULAT BETON BERTULANG

CONFINEMENT EFFECTIVENESS WITH FINE MESH ON CIRCULAR REINFORCED CONCRETE COLUMN

Created by :
Manaha, Yosimson Petrus 



Subjectbeton bertulang
KeywordTulangan transversal
daktilitas
fine mesh
kolom beton bertulang
kuat tekan beton
pengekangan
regangan beton

Description:

Keruntuhan bangunan yang terjadi banyak disebabkan oleh kegagalan struktur memikul beban gempa terutama elemen struktur kolom. Faktor yang mengakibatkan kegagalan kolom antara lain perancangan kolom yang tidak memperhitungkan daktilitas atau pengekangan, detailing kolom yang kurang baik sehingga kinerja kolom tersebut menurun dari yang direncanakan, selain itu perencana masih mengabaikan konsep ”Strong Columns Weak Beams”. Salah satu cara untuk meningkatkan daktilitas kolom pada struktur gedung lama adalah meretrofit kolom tersebut dengan cara meliliti kolom menggunakan tulangan transversal yang berfungsi sebagai tulangan pengekang. Namun pada penelitian ini akan dikaji apakah fungsi tulangan transversal sebagai tulangan pengekang mungkin digantikan oleh Fine Mesh (FM). Parameter kunci yang diteliti dalam penelitian ini adalah f 'cc ; 'cc dan cu ' . Permasalahan yang perlu diteliti adalah kedua parameter itu dibutuhkan untuk mempertahankan kinerja kolom terhadap beban siklik gempa yang lebih besar dari beban gempa nominal. Untuk memverifikasi peningkatan efektifitas seperti yang diprediksi melalui pendekatan analisis, maka dilakukan uji eksperimental . Pengujian eksperimental tersebut memakai benda uji kolom bulat diameter 250 mm dengan empat tipe kolom yaitu kolom beton polos (CCP), kolom beton terkekang fine mesh (CCFM), kolom beton terkekang tulangan spiral BJTP (CCS) dan kolom beton terkekang tulangan spiral BJTP yang dibungkus fine mesh (CCFMS). Hasil penelitian yang diperoleh dibandingkan dengan hasil analisis teoritis berdasarkan hubungan tegangan-regangan beton terkekang yang dikembangkan oleh Mander, dkk. dapat disimpulkan bahwa fine mesh cukup efektif bilamana digunakan sebagai tulangan pengekang pada kolom beton dalam arti meningkatkan daktilitas beton. Ini dibuktikan fine mesh pada kolom beton terkekang tulangan spiral yang dibungkus lagi oleh fine mesh (CCFMS) memberi efektifitas pengekangan yang setara dengan kolom beton terkekang tulangan spiral BJTP (CCS) dengan perbedaa n rasio tulangan transversal s= 13,23 %, kuat tekan ( ' cc f ) berbeda 5,94 %, regangan beton terkekang ( ' cc  ) berbeda 3,35 % dan regangan beton ultimit ( ' cu  ) berbeda 2,68 %. Sebaiknya kolom beton yang belum dirancang memikul beban gempa dapat diretrofit menggunakan fine mesh, agar dapat meningkatkan daktilitas dari kolom tersebut.


Alt. Description

Many of building collapse due to the structural failure in resisting the earthquake loading, paticularly in column members. Factors that resulting failure of column i.e. design of column that does not consider the ductility or confinement, unfavourable column detailing. These may cause column performance decreased, beside many designers still do not the "Strong Columns Weak Beams" concept. One way to increase column ductility in the building is by retrofitting the existing column with around the column using transversal bars which is functioning as confinement bars. This research investigated will be discussed is the possibility fine mesh as confinement bars replacing the conventional transversal reinforcement bars. Key parameters this research are f ' cc ; 'cc and cu ' . This key parameters is required that need to be observed is both parameters required to maintain column performance to earthquake under cyclic loading larger than nominal design earthquake loading. To verify the effectiveness stress-strain increase as predicted through analytical approach, experimental test is conducted. The test compressive uses circular column with diameter 250 mm and high 800 mm. The four column specimens types are plain concrete column (CCP), confined concrete column with fine mesh (CCFM), confined concrete column with smooth spiral bars (CCS) and confined concrete column with smooth spiral bars and wrapped by fine mesh (CCFMS). The result of research obtained is then compared with the theoritical analytical result based on stress-strain confined concrete developed by Mander and et.al., it is concluded that fine mesh is sufficiently effective when used as confinement concrete column is can increase the ductility of the column. From the investigation it is shown that column CCFMS (s = 0,02027) provided confinement effectiveness equivalent to column CCS (s = 0,02328). The difference for both column in compressive strength (f’cc) is 5.94 %, confined concrete strain (’cc) is 3.35 % and ultimate concrete strain (’cu) is 2.68 %. For concrete column is not designed considering earthquake loading can be retrofitted using fine mesh, because fine mesh can increase ductility of the column.

Contributor:
  1. Prof. Ir. Rachmat Purwono, M.Sc
    Tavio, ST, MT., PhD
Date Create:14/11/2008
Type:Text
Format:pdf.
Language:Indonesian
Identifier:ITS-Master-3100008031403
Collection ID:3100008031403
Call Number:RTS 624.183 41 Man e


Source :
Master Theses, SUB DEPARTMENT OF STRUCTURE DEPARTMENT OF CIVIL ENGINEEERING, RTS 624.183 41 Man e, 2008

Coverage :
ITS Community Only

Rights :
Copyright @2008 by ITS Library. This publication is protected by copyright and permission should be obtained from the ITS Library prior to any prohibited reproduction, storage in a retrievel system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to ITS Library


Publication URL :
http://digilib.its.ac.id/efektifitas-pengekangan-fine-mesh-padakolom-bulat-beton-bertulang-2207.html




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  1. ITS-Master-2207-3105202003-judul.pdf - 112 KB
  2. ITS-Master-2207-3105202003-bab1.pdf - 31 KB
  3. ITS-Master-2207-3105202003-bab2.pdf - 331 KB
  4. ITS-Master-2207-3105202003-bab3.pdf - 232 KB
  5. ITS-Master-2207-3105202003-bab4.pdf - 833 KB
  6. ITS-Master-2207-3105202003-kesimpulan.pdf - 38 KB
  7. ITS-Master-2207-3105202003-lampiran1.pdf - 143 KB
  8. ITS-Master-2207-3105202003-lampiran2.pdf - 161 KB
  9. ITS-Master-2207-3105202003-lampiran3.pdf - 76 KB
  10. ITS-Master-2207-3105202003-lampiran4.pdf - 30 KB
  11. ITS-Master-2207-3105202003-lampiran5.pdf - 181 KB
  12. ITS-Master-2207-3105202003-lampiran6.pdf - 149 KB
  13. ITS-Master-2207-3105202003-lampiran7.pdf - 184 KB



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Tulangan , Tulangan transversal , bertulang , beton , daktilitas , fine , fine mesh , kolom , kolom beton bertulang , kuat tekan , kuat tekan beton , mesh , pengekangan , regangan , regangan beton , transversal



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