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All Journal Teknologi dan Kejuruan: Jurnal teknologi, Kejuruan dan Pengajarannya BANGUNAN (Jurnal Berkala Jurusan Teknik Sipil UM) BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Journal Innovation of Civil Engineering (JICE) Jurnal Lingkungan Binaan Indonesia
B. Sri Umniati
Universitas Negeri Malang
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences Transportation

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MENINGKATKAN KAPASITAS GAYA GESER SAMBUNGAN BALOK KOLOM BETON BERTULANGAN BAMBU DENGAN MENGGUNAKAN ANGKER MEKANIK BAMBU B. Sri Umniati
ISSN 0852-2480
Publisher : BANGUNAN : Teori, Praktek, Penelitian, dan Pengajaran Teknik Bangunan

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Abstract

Keruntuhan struktur bangunan yang terkena beban gempa sebagian besar disebabkan oleh keruntuhan pada daerah sambungan balok kolom. Sementara bagian balok maupun bagian kolom di luar daerah sambungan masih menunjukkan kinerja yang baik. Untuk itu diperlukan penguatan daerah sambungan balok kolom agar kemampuan struktur menahan gaya gempa dapat dioptimalkan. Penelitian ini bertujuan untuk menginvestigasi karakteristik angker mekanik (headed bar) yang digunakan pada sambungan balok kolom beton bertulangan bambu dari bahan bambu dalam hal kapasitas gaya gesernya. Angker mekanik terdiri dari bagian kepala dan bagian kaki. Pada angker mekanik bambu, bagian kepala berasal dari buku bambu  dengan tebal total 2cm. Bagian kaki terbuat dari 4 bilah bambu, dengan lebar 3cm.
Meredam Kebisingan Pada Bangunan Yang Telah Ada B. Sri Umniati
ISSN 0852-2480
Publisher : BANGUNAN : Teori, Praktek, Penelitian, dan Pengajaran Teknik Bangunan

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Abstract

Salah satu aspek polusi adalah bersumber dari bunyi yang lebih dikenal dengan permasalahan kebisingan, yang dalam hal ini akan menyebabkan gangguan kenyamanan bagi penghuni sebuah bangunan. Aturan AMDAL bagi rencana proyek baru dengan mudah dapat dilaksanakan, akan menjadi suatu permasalahan apabila hadirnya kebisingan muncul setelah bangunan berdiri. Pemecahan permasalahan ini dapat dilakukan dengan berbagai macam cara, namun beberapa hal perlu juga dipertimbangkan, tentu hal ini berkaitan dengan finansial yang akan dikeluarkan di dalam pembenahan kawasan atau bangunan, sehingga apa yang diinginkan oleh kaidah-kaidah kebisingan dapat terpenuhi.
Sifat Mekanik Bata Ringan Geopolimer Berdasarkan Rasio Si/AL Fasya Khoirianti Rafrita; Siti Nur Rahmah Anwar; B. Sri Umniati
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 11 No 2 (2023): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (Juli 2023)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v11i2.6773

Abstract

The use of fly ash or fly ash is still minimally applied in Indonesia. The percentage of fly ash utilization is only 10-12% with 73% on Java Island and 27% on other islands, so there will be an accumulation of fly ash of up to 10.4 million tons per year by 2027. Abundant fly ash can be utilized by making lightweight brick the main composition as a substitute for cement called geopolymer lightweight brick. The fly ash used is class F with mechanical testing based on the Si/Al ratio. This research was conducted to analyze the effect of activator content on mechanical testing consisting of compressive strength, split tensile strength, and modulus of rupture in order to obtain the mechanical properties of lightweight geopolymer bricks. The higher of the activator content, got the greater Si/Al ratio. The ratios at activator levels of 35, 40, and 45% were 2.42; 2.45; and 2.48. The difference between split tensile strength and compressive strength for 35% activator content is 6.45%; 40% is 5.94%; and 45% is 6.04% so it is included in high quality lightweight brick. The level of activator has a significant effect on the compressive strength, split tensile strength, and modulus of rupture. The lower Si/Al ratio results in higher and better compressive strength, split tensile strength, and modulus of rupture.
Development of Intensive Apprenticeship Models for Accelerating Certification Isnandar, Isnandar; Suwarno, Eko; Ariestadi, Dian; Umniati, B. Sri; Al Ansyorie, Mohammad Musthofa
Teknologi dan Kejuruan: Jurnal Teknologi, Kejuruan, dan Pengajarannya Vol 44, No 1: Februari 2021
Publisher : Fakultas Teknik Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um031v44i12021p21-27

Abstract

As a consequence of the rapid development of infrastructures, there is a scarcity of availability of skilled labor in construction services, so efforts are needed to accelerate the preparation of experts in the field of construction services. Intensive apprenticeship pattern is a program to accelerate the preparation of construction service workers in increasing the relevance of higher education to the world of work as a purpose in this study. Data analysis used comparative analysis and descriptive statistics. The results of the study show that the existing pattern of internship in the field carried out by the sample universities is that there are two things that have not been widely implemented, namely the provision of insurance and special facilities. While other items related to the implementation of internships have a percentage of more than 50 percent. The apprenticeship patterns that can be implemented include through the process of collaboration, socialization, participant registration, self assessment, matriculation, implementation of internships, appraisal, and granting certificates from the Construction Services Business Entity (CSBE/ BUJK). Whereas Certification is carried out in general through Pre-Internship, Internships, Judicium, Post-Judiciary, Graduation and Certification of Young Experts.
Numerical Analysis of the Effect of Adding Bamboo Culms on Hollow Composite Concrete Column Structures on Axial Capacity Muhtadi, Sabilul; Umniati, B. Sri; Sulton, Mohammad
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 7, No 1 (2022): EDISI MARET 2022
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v7i1.3188

Abstract

The problem of self-weight in a structure is an important thing to study. This study aims to find a solution to the problem of self-weight by making a hollow column structure. Bamboo is added to the column structure to replace the strength of the concrete volume lost due to voids. The test object consisted of four columns, three hollow columns with the addition of bamboo rods, and one solid column. Variations in the number of bamboo sticks, namely one, two, and four sticks, were inserted into a column with a cross-section of 300x300 mm and a height of 800 mm. The type of bamboo used is petung bamboo with a minimum age of three years with a diameter of ±120 mm. Twelve pieces of bamboo reinforcement measuring 15x10 mm and four pieces of steel reinforcement with a diameter of 10 mm were used as the primary reinforcement. For stirrups, closed stirrups with a diameter of 8 mm are used. The load given to the column is an axial load of 900 kN on the top surface of the column. From the results of the study, the presence of cavities and the addition of bamboo stems in the column caused an increase in the value of the axial deformation, from 0.2675 mm in the Solid Column, then Columns A, B, and C increased to 0.2707 mm, 0.2731 mm and 0.2874 mm respectively.ABSTRAKPermasalahan berat sendiri pada suatu struktur menjadi hal yang penting untuk dikaji. Penelitian ini bertujuan untuk menemukan solusi dari permasalahan berat sendiri dengan membuat struktur kolom berongga. Untuk menggantikan kekuatan dari volume beton yang hilang karena rongga, maka ditambahkan bambu ke dalam struktur kolom. Benda uji terdiri dari empat kolom, tiga kolom berongga dengan penambahan batang bambu dan satu kolom solid. Variasi jumlah batang bambu yaitu satu, dua, dan empat batang,  dimasukkan ke dalam kolom dengan penampang 300x300 mm dan tinggi 800 mm. Jenis bambu yang digunakan yaitu bambu petung berumur minimal tiga tahun dengan diameter ±120mm. 12 buah tulangan bambu berukuran 15x10 mm dan 4 buah tulangan baja berdiameter 10 mm digunakan sebagai tulangan utama. Untuk sengkang, digunakan sengkang tertutup dengan diameter 8 mm. Beban yang diberikan pada kolom berupa beban aksial sebesar 900 kN pada permukaan atas kolom. Dari hasil penelitian, adanya rongga dan penambahan batang bambu pada kolom menyebabkan kenaikan nilai deformasi aksial, dari 0,2675 mm pada Kolom Solid, lalu Kolom A, B dan C berturut-turut meningkat menjadi 0,2707 mm, 0,2731 mm dan 0,2874 mm.
DURABILITAS KOLOM BETON TULANGAN BAMBU TERHADAP PENGARUH SUHU TINGGI Wardana, Erik Fadilah Kusuma; Umniati, B. Sri; Risdanareni, Puput
Journal Innovation of Civil Engineering (JICE) Vol 6 No 1 (2025)
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jice.v6i1.23582

Abstract

Reinforced concrete plays a crucial role in structural systems by providing strength and stability to buildings. Recent advancements in construction technology have introduced bamboo as an alternative reinforcement material to steel, due to its relatively high tensile strength (up to 253 MPa). However, bamboo's high cellulose content increases its vulnerability to fire. During building fires, structural elements may be exposed to temperatures between 800–1000°C for up to one hour. This study aims to investigate the effect of elevated temperatures on the axial load capacity and strain behavior of bamboo-reinforced concrete columns. Two reinforcement types were tested: (1) intact round bamboo with spiral steel stirrups, and (2) slatted bamboo with rectangular steel stirrups. All specimens were made using 25 MPa concrete with dimensions of 15×15×60 cm, and were exposed to 800°C for one hour before testing. Results showed that the round bamboo column with spiral stirrups sustained a maximum axial load of 247.6 kN (4.67% lower than analytical predictions and 59.83% lower than pre-fire values). The slatted bamboo column with rectangular stirrups held 233.2 kN (4.18% lower analytically and 61.78% lower than pre-fire values). Axial and lateral strain values varied slightly between specimens. This research highlights the structural viability of bamboo reinforcement under high-temperature exposure. Keywords: High Temperature Effect; Concrete Column; Bamboo Reinforced Concrete.
Model Tata Massa Arsitektur Sasak di Pulau Lombok Gatot Adi Susilo; B. Sri Umniati
Jurnal Lingkungan Binaan Indonesia Vol. 10 No. 1 (2021): JLBI
Publisher : Ikatan Peneliti Lingkungan Binaan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1628.382 KB) | DOI: 10.32315/jlbi.v10i01.6

Abstract

Pemahaman nilai-nilai kearifan lokal terutama pada nilai tradisional, penting untuk dipaparkan, agar generasi mendatang tetap dapat menghargai kekayaan leluhurnya. Penelitian ini merupakan deskripsi mengenai model tata massa khususnya rumah adat, yaitu pada Arsitektur Sasak, Lombok. Metode pengamatan dilakukan di sembilan lokasi desa adat yang tersebar di Pulau Lombok, dan hanya enam lokasi yang dapat dijadikan sebagai sampel yaitu: rumah adat Sade, rumah adat Limbungan Barat, rumah adat Limbungan Timur, rumah adat Sembalun, rumah adat Senaru dan rumah adat Beleq Gumentar. Hasil penelitian menemukenali adanya dua jenis tipe penataan massa berdasarkan kondisi lokasi, yaitu pola tatanan massa di area berkontur dan di area yang datar. Tipe bangunan yang dipilih bersesuaian dengan jenis pola tatanan massanya, di mana tipe Bale Mengina diperuntukkan untuk daerah datar, sedangkan tipe Bale Tani diperuntukkan untuk daerah berkontur. Adapun tipe Geleng yang ditemui pada semua tipe tatanan massa, mengalami proses tranformasi bentuk. It is important to explain the values of local wisdom, especially the traditional values, so that the future generations can still appreciate the wealth of their ancestors. This research is a description of the mass system model, especially the traditional houses, in Sasak Architecture, Lombok. Observation was performed on nine location scattered throughout Lombok island. From those nine locations, there were six that could be qualified as samples. Those six are Sade traditional house, Limbungan Barat traditional house, Limbungan Timur traditional house, Sembalun traditional house, Senaru traditional house, and Beleq Gumentar traditional house. By assessing those six samples, it is found that there are two types of massing according to the land condition, which are massing on contoured land and on flat land. The building type are also selected according to the massing type, where Bale Mengina used in flat land and Bale Tani in contoured land. Geleng type, which could be found in all type of massing, experiences form transformation.
Co-Authors Anang Ansyori Dian Ariestadi Eko Suwarno Fasya Khoirianti Rafrita Gatot Adi Susilo Isnandar Mohammad Sulton Muhtadi, Sabilul Puput Risdanareni Siti Nur Rahmah Anwar Wardana, Erik Fadilah Kusuma