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"Skripsi ini membahas mengenai simulasi dari Low Strain Integrity Testing yang diterapkan pada permodelan dinding penahan tanah, yang dilakukan dengan menggunakan software geoteknik yaitu PLAXIS v8. Penelitian yang pernah dilakukan sebelumnya terhadap pondasi tiang, menghasilkan kesimpulan bahwa data beda waktu resonansi pada grafik waktu terhadap kecepatan dan beda frekuensi pada grafik mobilitas dapat digunakan untuk menginterpretasikan panjang tiang. Pada penelitian ini, data didapatkan dari hasil simulasi dari permodelan yang dijalankan menggunakan program PLAXIS v8. Dari hasil analisa data, didapat bahwa pada simulasi yang dilakukan terhadap dinding penahan tanah ini memberikan hasil panjang dinding yang kurang sesuai dengan hasil yang diperoleh dari perhitungan teoritis. Selain itu dapat disimpulkan bahwa akurasi data panjang dinding turut dipengaruhi oleh keberadaan tanah yang berada di sekeliling dinding.

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This far, there have been so many retaining wall constructions already built all over the world. From all those retaining wall structures, there would be some of them which has un-identified existing condition, whether its type, dimension, and depth. To figure out the characteristics of those unknown retaining wall structures, there must be a method which could help the author in doing the analysis. In this paper, the author defines the case which would be analyzed as concrete retaining wall, which has the unknown dimension and depth. Dimension and depth of this existing retaining wall could be defined by using low strain integrity testing method. Basically, the main concept of this kind of testing is identical with wave reflection testing. Then the testing and/or interpretation can be simple to do because this evaluation identical with wave reflection evaluations. Analyzingwave reflection, author use one of Geotechnical Software i.e. PLAXIS Version 8. Outputs are obtained from PLAXIS v8 that is graphics of time and frequencydomain."

"Kerusakan yang paling sering terjadi pada bangunan sederhana non engineered seperti bangunan ruko akibat gempa bumi adalah pada dinding bata. Salah satu metode perbaikan yang dapat digunakan adalah metode kawat anyam terpaku dengan plester. Penelitian ini bertujuan untuk mengetahui efek perbaikan dengan plester dan kawat anyam terpaku terhadap kinerja dinding bata. Perbaikan dengan plester dan kawat anyam terpaku diharapkan mampu mengembalikan kekuatan dan kekakuan dinding bata yang retak akibat beban lateral. Penelitian berdasarkan analisis elastis linier dengan continuum model menggunakan perangkat lunak SAP2000 v14.1. Model yang digunakan adalah satu panel dinding bata dengan beban lateral in-plane dan ruko tiga lantai dengan beban gempa statik ekuivalen sesuai SNI 03-1726-2002. Elemen link digunakan sebagai penghubung antara portal dengan dinding bata. Kekakuan portal dan dinding bata dianalisis berdasarkan evaluasi periode getar alami dan simpangan sedangkan kekuatannya dianalisis berdasarkan evaluasi tegangan. Efek separasi antara portal beton dan dinding bata dianalisis dengan melepas elemen link. Hasil analisis menunjukkan bahwa perbaikan dengan plester dan kawat anyam terpaku mampu mengembalikan kinerja dinding bata retak seperti kondisi utuh.

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The most common damage due to earthquake on simple non-engineering building such as store-house is the crack on its masonry wall. Plaster and nailed low grade wire mesh can be used as one of the retrofitting method. The aim of this study is to investigate the effects of retrofitting using both plaster and nailed low grade wire mesh to the performance of masonry wall. The usage of plaster and nailed low grade wiremesh has been expected to restore strength and stiffness of cracked masonry walls due to lateral load.

This study is based on linear elastic analysis with continuum models approach using SAP200 v14.1. The model used in this study was one panel of masonry wall with lateral in-plane loading and a three stories three bays store-house building with static equivalent earthquake loading based on SNI 03-1726-2002.

The Rigid link element was used as a connector between the frame and the masonry wall. Stiffness of both the frame and masonry wall has been analyzed by fundamental period and deflection evaluation, and the strength has been analyzed by stress evaluation. The effect of separation between the frame and masonry wall has been analyzed by releasing the rigid link element. The results of the analysis indicated that retrofitting method using plaster and nailed low grade wire mesh was capable to restore the performance of cracked masonry wall as its initial condition."

"Post-tensioned (PT) flat slab merupakan salah stau sistem struktur yang banyak digunakan di beberapa negara seperti Amerika Serikat, Australia, Afrika Selatan, Thailand, dan India. Dibanding negara lain, penggunaan PT flat slab di Indonesia masih tergolong sedikit, umumnya hanya pada basement. Hal ini dapat diakibatkan oleh struktur flat slab yang rentan terhadap pengaruh gaya lateral, khususnya di Indonesia dengan potensi gempa tinggi. Namun, penggunaan flat slab masih memungkinkan untuk digunakan di daerah dengan potensi gempa tinggi dengan menerapkan Separated Gravity Lateral Resisting System (SGLR System) yaitu desain yang memisahkan antara penahan lateral dan penahan beban gravitasi. Dalam penelitian ini, beban lateral akan dipikul oleh SRPMK dan dinding geser sedangkan flat slab hanya menahan gravtasi. Melalui penelitian ini diharapkan informasi terkait PT flat slab di Indonesia dapat bertamba.

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Post-tensioned (PT) flat slab is one of the structural systems widely used in several countries such as the United States, Australia, South Africa, Thailand, and India. Compared to other countries, the use of PT flat slab in Indonesia is still relatively small, generally only in basements. This can be caused by the flat slab structure which is vulnerable to the influence of lateral forces, especially in Indonesia with high earthquake potential. However, the use of flat slabs is still possible to be used in areas with high earthquake potential by implementing the Separated Gravity Lateral Resisting System (SGLR System), a design that separates lateral resistance and gravity load resistance. In this study, the lateral load will be resist by the special moment resisting frames and shear walls while the flat slab only resists gravity. Through this study, it is hoped that information related to PT flat slabs in Indonesia can be increased."

"ABSTRAKPerforma bangunan beton bertulang dengan sistem dinding geser khusus dengan rangka penahan momen khusus (sistem ganda) yang didesain sesuai ASCE 7-16, dievaluasi dengan Performance-Based Seismic Design (PBSD) sesuai ASCE 41-17, berdasarkan variasi konfigurasi bentang struktur, jumlah lantai, konfigurasi dinding geser, dan geometri bangunan. Dalam tata cara perencanaan, perilaku inelastis struktur disederhanakan dalam bentuk modifikasi respons gempa R, yang bergantung hanya pada sistem struktur. Kontribusi konfigurasi struktur terhadap perilaku inelastis aktual tidak diketahui. Non-Linear Time History Analysis menggunakan 11 pasang ground motion yang terskalakan terhadap respons spektra ASCE 7-16, digunakan untuk menilai potensi performa tata cara perencanaan. Hasil evaluasi menunjukkan bahwa peningkatan jumlah bentang struktur dan penggunaan faktor redundansi, dapat meningkatkan performa dan redundansi struktur. Peningkatan jumlah lantai, konfigurasi dinding geser asimetris, torsi tak terduga dan pengarahan ground motion pada sumbu utama struktur dapat menurunkan performa dan redundansi struktur. Prediksi kebutuhan dapat dengan mudah melampaui kapasitas rotasi inelastis balok dan kolom pada bangunan dengan SRPMK, sedangkan prediksi kebutuhan dapat dengan mudah melebihi kapasitas kuat geser dinding geser pada bangunan dengan sistem ganda. Secara keseluruhan, bangunan yang sudah didesain menurut ASCE 7 tidak terjamin dapat mencapai tujuan target kinerja menurut ASCE 41.

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ABSTRACTPerformance of special reinforced concrete shear walls with special moment frame (dual systems) buildings designed in accordance with ASCE 7-16, are evaluated with Performance-Based Seismic Design (PBSD) in accordance with ASCE 41-17, based on variations in structure bays configuration, number of levels, shear walls configuration, and building geometry. In prescriptive code, structure inelastic behaviour is simplified in forms of seismic response modification R, which depends solely on structural system. Contribution of structure configuration, to actual structure inelastic behavior remains unknown. Non-Linear Time History Analysis using 11 pairs of ground motions matched to ASCE 7-16 response spectrum is used to assess the potential performance of prescriptive code. Evaluation results show that increasing amount of structure bays and usage of redundancy factor, may increase structure performance and redundancy. Increasing number of levels, asymmetric shear walls configuration, accidental torsion and ground motions directionality may reduce structure performance and redundancy. Predicted demands may easily exceed beams' and columns' inelastic rotation capacity in buildings with SMF, while predicted demands may easily exceed shear walls' shear strength capacities in buildings with dual systems. Thus in overall, the buildings designed as per ASCE 7 are not guaranteed may achieve expected target performance objective by ASCE 41."

"Pedoman pelaksanaan pekerjaan telah dimiliki oleh kontraktor pondasi dalam  dan dinding penahan tanah. Namun dalam pelaksanaan pekerjaan pondasi dalam dan dinding penahan tanah seringkali menghadapi risiko yang jika terjadi dapat mengakibatkan peningkatan keterlambatan pekerjaan. Risiko pelaksanaan pondasi dalam dan dinding penahan tanah sering timbul karena adanya risiko yang tidak terlihat di dalam tanah. Oleh karena itu, diperlukan pedoman pelaksanaan yang berbasis risiko. Penelitian ini bertujuan untuk mengidentifikasi risiko, menganalisis dampak yang kemudian membuat respon risiko dan mengembangkan pedoman pelaksanaan berdasarkan risiko. Metode kualitatif dengan menggunakan Analityc Hierarchy Process (AHP) digunakan dalam penelitian ini. Ditemukan faktor risiko yang dominan adalah beton tidak memenuhi spesifikasi, akses jalan yang terbatas ke lokasi proyek, kurangnya koordinasi dengan masyarakat sekitar, kesalahan metode pelaksanaan dan ketelitian tim surveyor. Oleh karena itu, respon risikonya adalah mengganti beton sesuai spesifikasi, mengelola akses dan jadwal transportasi terutama peralatan dan material ke lokasi proyek, pelibatan masyarakat, mengevaluasi dan menentukan metode yang lebih tepat serta mengevaluasi dan menghitung ulang desain. Pedoman pelaksanaan berdasarkan risiko diharapkan dapat digunakan oleh kontraktor spesialis untuk meminimalkan dampak negatif pada konstruksi pekerjaan pondasi dalam dan dinding penahan tanah.     

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A technical execution guidelines have been owned by contractor for deep foundation and retaining walls works. However, in carrying out the work of deep foundations and retaining walls, its was often face risks, which if its occur, can result in increased construction delay. The execution of deep foundation dan retaining walls risks often arise due to invisible risks in the ground. Therefore, the execution guidelines based on risk is required. This research aims to identify risks, analyze impacts which then build the risk responses and develop execution guidelines based on risk. Qualitative methods using Analityc Hierarchy Process (AHP) is used in this research. It was found dominant risk factor are concrete does not meet specification, limited road access to the project site, lack of coordination with the surrounding community, wrong method statement and the accuracy of the surveyor team. Therefore, the risk response are replacing the concrete according to the requirement, managing the access and schedule for transportation especially equipment and materials to the project site, community engagement, evaluating and determining the more appropriate  method as well as evaluating and re-calculating the design. Execution guidelines based on risk are expected to be used by specialist contractors to minimize the negative impact on the construction of deep foundation and retaining wall works."

"ABSTRAKJurnal ini membahas salah satu bangunan peninggalan Belanda yang sampai saat ini masih aktif digunakan sebagaipusat penelitian dan pengembangan industri agro oleh pemerintah Indonesia melalui Kementrian Perindustrian. Jurnalini bertujuan untuk memaparkan unsur adaptasi arsitektur Indis yang terdapat pada eksterior Balai Besar Industri Agro.Metode yang digunakan untuk menganalisis penelitian ini yakni deskriptif kualitatif berdasarkan teori-teoripendukung seperti gaya arsitektur Indis, gaya arsitektur Jawa dan gaya arsitektur Eropa. Setelah melalui beberapaproses analisis, eksterior pada bangunan Balai Besar Industri Agro memiliki karakteristik yang diadaptasi dari gayaIndis.

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ABSTRACTThis journal discusses one of the Dutch heritage buildings that are still actively used as a center for research anddevelopment of the agro industry by the Indonesian government through the Ministry of Industry. This journal aimsto describe the elements of adaptation of the Indis architecture found on the exterior of the Balai Besar Industri Agro.The method used to analyze this research by using qualitative descriptive based on supporting theories such as Indisarchitectural style, Javanese architectural style and European architectural style. After going through severalanalysis processes, the exterior of the Balai Besar Industri Agro has a characteristic adapted from the Indis style."

"The construction of the retaining wall should be base on stability calculation and safety factor, because any error in the construction process can have fatal consequences in property damages and the lost of life. The case of retaining wall at Lapangan Parkir Dermaga Pengumbuk is the damage of its retaining wall, which can be observe by the movement of the retaining wall in horizontal direction and the cracks on the retaining wall. Analysis indicate that the retaining wall failure on this case is due to shear instability, and the creep also contributed to the construction movement on the location. This paper contains the analysis of the problems on the retaining to have an effective and efficient alternative problem solutions."

"ABSTRAKPada dunia ritel grosir, keragaman pembelian barang oleh pelanggan berkaitan erat terhadap laba. Pembelian satu barang yang sama dalam jumlah besar akan mendapatkan potongan harga yang lebih besar. Pemotongan harga ini mengurangi laba dari perusahaan ritel. Oleh karena itu, pelanggan selalu diharapkan untuk membeli banyak barang yang berbeda. PT Lotte Shopping Indonesia telah menetapkan target pencapaian untuk keragaman pembelian barang pada segmen pelanggan ritel dan horeka. Namun saat ini target tersebut masih belum dapat terpenuhi. Kesulitan yang dialami adalah menawarkan barang yang tepat kepada pelanggan. Inovasi yang dapat diterapkan adalah pengembangan sistem rekomendasi untuk menawarkan barang yang relevan. Penelitian ini menggunakan pendekatan collaborative filtering untuk membangun model sistem rekomendasi. Penelitian dilakukan terhadap data penjualan 2,5 tahun terakhir dengan jumlah transaksi mencapai 4,6 juta. Hasil dari penelitian menunjukkan bahwa metode memory-based k-Nearest Neighbors mengungguli metode model-based Singular Value Decomposition. Selain itu ditemukan bahwa segmentasi pelanggan tidak berhasil meningkatkan kinerja sistem.

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ABSTRACTThe variety of goods purchased by customer closely related to retailer rsquo s profit. When an item purchased in large amount, it will get a larger discount which hurts retailer rsquo s profit. Big retailer chain always tries to entice customer to buy many different set of items. PT Lotte Shopping Indonesia has targets for variety of goods purchased in their retail and horeca segments. This target has not achieved regularly. Marketing team have trouble in offering right products. Recommendation system used in many e commerce retailers to offer relevant products. This study uses collaborative filtering approach to build recommendation system. The study conducted on sales data in the last 2.5 years with numbers transactions of 4.6 million. The result shows that memory based k Nearest Neighbors method outperformed the model based Singular Value Decomposition method. In addition, it was found that customer segmentation could not improve system performance."