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All Journal Teras Jurnal Jurnal Matematika Sains dan Teknologi Jurnal Teknik Sipil
Mohd Isneini
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Mathematics Other

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KAJIAN EKSPERIMENTAL FAKTOR REDAMAN BETON POLIMER DENGAN MODAL TESTING Mohd Isneini
Jurnal Matematika Sains dan Teknologi Vol. 4 No. 1 (2003)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (525.482 KB) | DOI: 10.33830/jmst.v4i1.660.2003

Abstract

Polimer concrete has different behaviour and different mechanic characteristic than others because it depends on material polimer that are used, so that it caused to be researched and be studied its behaviour and mechanic caracteristic.This polimer concrete was made of prepacked system, consisted of unsaturated polyester (UP) added with styrene monomer (SM) as binder matrix, cobalt napthenate solution (CoNp) as a promotor and methyl ethyl ketone peroxide (MEKPO) as an initiator, and coarse aggregate as inclusion. In this composition, variation of polymer concrete based on percentage of polimer and fly ash as a filler, and any other materials were keeped in constant.The object of this research are to find out values of damping (loss factor), dynamic parameter, so that series of laboratory tests were carried out. Test results showed, values of damping (loss factor) 1,669 – 3,017%. Results also showed that much and much more content of polymer caused loss factor (h ), damping coeffisien (c) and damping ratio (x ) decrease, however it showed that fly ash affected to increase value of dynamic parameter.
Gempa Megathrust Retrofitting Gedung Beton Bertulang terhadap Gempa Bumi Megathrust di Sekitar Zona Seismic Gap Lukman Sarifuddin; Mohd Isneini
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1365

Abstract

Abstrak   Gempa bumi yang berkaitan dengan zona megathrust Selat Sunda merupakan ancaman seismik yang signifikan yang diakibatkan oleh aktivitas tektonik zona subduksi pada segmen seismic gap. Penelitian ini bertujuan untuk mengevaluasi kinerja salah satu struktur gedung beton bertulang di wilayah rawan gempa serta mengusulkan strategi retrofitting guna mengurangi risiko kerusakan akibat potensi gempa besar yang dapat terjadi pada zona tersebut. Pengumpulan data dilakukan melalui survei lapangan, pengujian material, serta analisis struktur menggunakan perangkat lunak ETABS. Hasil penelitian menunjukkan bahwa gedung eksisting tidak mampu menahan simpangan akibat beban lateral yang melebihi 1,0% dari ketinggian gedung. Sehingga penerapan retrofitting dengan pemasangan bracing baja mampu mengurangi simpangan menjadi kurang dari 1,0% dari ketinggian gedung dan mengurangi risiko kegagalan akibat deformasi berlebih pada struktur. Penelitian ini menegaskan pentingnya evaluasi seismik secara berkala sesuai peta gempa pada regulasi terbaru serta menekankan perlunya penerapan langkah-langkah retrofitting terhadap risiko gempa megathrust guna menjamin keselamatan penggunanya.   Kata kunci: evaluasi seismik, kinerja struktur, retrofitting, gempa megathrust, non-destruktif test     Abstract   The Sunda Strait megathrust zone represents a significant seismic threat resulting from tectonic activity along the subduction interface located within a seismic gap segment. This study aims to evaluate the seismic performance of an existing reinforced concrete building in an earthquake prone region and to propose retrofitting strategies to reduce damage caused by potential large earthquakes associated with the subduction zone activity. Data were obtained through field surveys material testing and structural analysis using ETABS software. The results show that the existing building cannot resist lateral displacements exceeding 1,0% of total building height under seismic loading. Retrofitting using steel bracing is able to reduces lateral displacement to less than 1,0% of building height and lowers the risk of structural failure from excessive deformation. This study emphasizes periodic seismic evaluation based on updated hazard maps and the need for retrofitting measures to mitigate megathrust earthquake risk and ensure occupant safety.   Keywords: seismic evaluation, structural performance, retrofitting, megathrust earthquake, non-destructive testing
Gempa Megathrust Retrofitting Gedung Beton Bertulang terhadap Gempa Bumi Megathrust di Sekitar Zona Seismic Gap Lukman Sarifuddin; Mohd Isneini
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1365

Abstract

Abstrak   Gempa bumi yang berkaitan dengan zona megathrust Selat Sunda merupakan ancaman seismik yang signifikan yang diakibatkan oleh aktivitas tektonik zona subduksi pada segmen seismic gap. Penelitian ini bertujuan untuk mengevaluasi kinerja salah satu struktur gedung beton bertulang di wilayah rawan gempa serta mengusulkan strategi retrofitting guna mengurangi risiko kerusakan akibat potensi gempa besar yang dapat terjadi pada zona tersebut. Pengumpulan data dilakukan melalui survei lapangan, pengujian material, serta analisis struktur menggunakan perangkat lunak ETABS. Hasil penelitian menunjukkan bahwa gedung eksisting tidak mampu menahan simpangan akibat beban lateral yang melebihi 1,0% dari ketinggian gedung. Sehingga penerapan retrofitting dengan pemasangan bracing baja mampu mengurangi simpangan menjadi kurang dari 1,0% dari ketinggian gedung dan mengurangi risiko kegagalan akibat deformasi berlebih pada struktur. Penelitian ini menegaskan pentingnya evaluasi seismik secara berkala sesuai peta gempa pada regulasi terbaru serta menekankan perlunya penerapan langkah-langkah retrofitting terhadap risiko gempa megathrust guna menjamin keselamatan penggunanya.   Kata kunci: evaluasi seismik, kinerja struktur, retrofitting, gempa megathrust, non-destruktif test     Abstract   The Sunda Strait megathrust zone represents a significant seismic threat resulting from tectonic activity along the subduction interface located within a seismic gap segment. This study aims to evaluate the seismic performance of an existing reinforced concrete building in an earthquake prone region and to propose retrofitting strategies to reduce damage caused by potential large earthquakes associated with the subduction zone activity. Data were obtained through field surveys material testing and structural analysis using ETABS software. The results show that the existing building cannot resist lateral displacements exceeding 1,0% of total building height under seismic loading. Retrofitting using steel bracing is able to reduces lateral displacement to less than 1,0% of building height and lowers the risk of structural failure from excessive deformation. This study emphasizes periodic seismic evaluation based on updated hazard maps and the need for retrofitting measures to mitigate megathrust earthquake risk and ensure occupant safety.   Keywords: seismic evaluation, structural performance, retrofitting, megathrust earthquake, non-destructive testing
Co-Authors Adipati Syahidullah Ulini'am Alvino Wafi Chatarina Niken DWSBU Hasti Riakara Husni Laksmi Irianti Lukman Sarifuddin Siti Zalfa Mardhatillah Surya Sebayang Vera Agustriana Noorhidana