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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Teknik Sipil dan Arsitektur Martabe : Jurnal Pengabdian Kepada Masyarakat JMTS: Jurnal Mitra Teknik Sipil DEVICE Jurnal Teknik Sipil Giratory Upgris Journal of Economic, Business and Engineering (JEBE) Aceh International Journal of Science and Technology Jurnal Pengabdian KOLABORATIF Jurnal Teknik Indonesia Advance Sustainable Science, Engineering and Technology (ASSET) Widya Teknik Jurnal Teknik Sipil
Risdiana Cholifatul Afifah
Univesrsitas Persatuan Guru Republik Indonesia Semarang
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Transportation

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ANALISIS JALUR KRITIS MENGGUNAKAN METODE CPM CRITICAL PATH METHOD UNTUK OPTIMASI WAKTU PENYELESAIAN PEMBANGUNAN GEDUNG BHAYANGKARI POLRES LAMONGAN Setiawan, Agus; Putra, Dani Pranata; Irawati, Iin; Saputra, Nor Dede Dwi Aditya; Ramadhan, Zhafif Fawwazsatya; Afifah, Risdiana Cholifatul
Jurnal Teknik Sipil Giratory UPGRIS Vol 7, No 1: Juni 2026
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/giratory.v7i1.28135

Abstract

The construction of the Bhayangkari Police Headquarters in Lamongan is a large-scale project requiring efficient time management. This study aims to analyze the application of the Critical Path Method (CPM) to optimize project completion time. By applying the CPM method, the critical path is identified, which allows for prioritizing activities that significantly affect the overall project duration. The results of this study show that the project, initially planned to be completed in 150 calendar days, can be completed in 122 calendar days. The identification of the critical path reveals 31 activities that directly impact the project's overall duration. This research provides insights into time management in construction projects and recommends optimizing scheduling and resource allocation to ensure timely project completion.
Flood Mitigation in East Coast Semarang City: Hydrological and Hydraulic Analysis for Polder System Optimization Ikhwanudin; Imadudin Harjanto; Risdiana Cholifatul Afifah; Farida Yudaningrum
Advance Sustainable Science Engineering and Technology Vol. 8 No. 1 (2026): November - January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i1.2764

Abstract

Flooding is a recurring hazard across Indonesia, particularly in urban regions such as Semarang City, where high-intensity rainfall, tidal surges, land subsidence, and changes in land use contribute to frequent inundation. This study investigates the effectiveness of the Sringin Polder system in mitigating flood risks through an integrated hydrological and hydraulic analysis. The hydrological component involved calculating design rainfall values for various return periods, with a peak intensity of 113 mm recorded for the 10-year event. These values were used to simulate flood discharges using HEC-RAS.For the 25-year return period, the main river channel produced a simulated flood discharge of 47.42 m³/s, resulting in water overtopping the left embankment by 0.545 m at station P.30.  calculated flood flow and the existing capacity of the river cross-sections.
DISTRIBUSI SEDIMEN PADA WADUK JATIBARANG, KOTA SEMARANG Fitria Maya Lestari; Ratih Pujiastuti; Risdiana Cholifatul Afifah
Jurnal Teknik Indonesia Vol 5, No 2 (2024): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v5i2.662

Abstract

The main issue in the operation of reservoirs is sedimentation. This can lead to silting and affect the reservoir's storage capacity. The distribution of sediments needs to be understood in order to gain an overview of their spread, so that measures can be taken to address sediment-related issues in the Jatibarang Reservoir. The analysis was conducted using sediment data from previous studies, which reported a total sediment volume of 6.64 million m³ over a period of 50 years. Based on topographic data, it was found that the Jatibarang Reservoir is classified as Type III, with a "hill" classification. The analysis results showed that the dimensionless factor F is 0.22, with a relative depth p of 0.53. Based on the sediment distribution analysis of the Jatibarang Reservoir with Empirical Area Reduction Method, it was found that after 50 years of operation, the new zero elevation of the reservoir would be at an elevation of +126.82 m. In comparison with the low water surface elevation at the existing dead storage of the Jatibarang Reservoir, which is at +136 m, it can be concluded that the Jatibarang reservoir can operate according to the planned lifespan and can still function for more than 50 years
Analisis Kinerja Struktur Bangunan Gedung Laboratorium 5 Lantai Terhadap Gempa Kuat Lintang Enggartiasto; Agung Kristiawan; Ikhwanudin Ikhwanudin; Risdiana Cholifatul Afifah
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 2 (2024): Volume 14 Nomor 2, September 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i2.1186

Abstract

Abstrak Perencanaan ketahanan gempa untuk bangunan gedung sangat diperlukan sebagai konsekuensi kondisi geografi Negara Indonesia yang sebagian besar memiliki resiko gempa yang tinggi. Penelitian ini membahas kinerja struktur gedung laboratorium 5 lantai eksisting terhadap gempa kuat. Metode yang digunakan meliputi non-linier statik pushover dan non linier dinamik riwayat waktu (time history). Rekaman gempa yang digunakan digunakan adalah gempa kuat dengan percepatan spektrum 0.2 detik dengan rasio redaman 5% untuk periode 2500 tahun. Hasil analisis pushover level kinerja struktur saat performance point arah X termasuk kategori Immediate Occupancy dan arah Y termasuk kategori Damage Control dengan parameter sistem struktur hasil analisis non linier yang memenuhi syarat terhadap parameter desain SNI 1726-2019. Drift ratio terbesar pada analisis riwayat waktu menghasilkan level kinerja struktur dengan kategori Damage Control. Disimpulkan dengan kategori level kinerja struktur tersebut, saat terjadi gempa kuat (periode 2500 tahun) struktur akan mengalami kerusakan struktural yang ringan dan masih dapat diperbaiki untuk difungsikan kembali. Kata kunci: Desain berbasis kinerja, analisis non-linier, level kinerja struktur  Abstract Due to the geography of Indonesia, most of which has a high seismic risk, seismic design of buildings is necessary. This research discusses the structural performance of an existing 5-story laboratory building against strong earthquakes.  The methods used include nonlinear static pushover and nonlinear dynamic time history. The earthquake record used is a strong earthquake with an acceleration spectrum of 0.2 seconds and a damping ratio of 5% for a period of 2500 years. The results of the pushover analysis of the structural performance level at the performance point in the X-direction include the Immediate Occupancy category and in the Y-direction include the Damage Control category with the structural system parameters of the nonlinear analysis results that meet the requirements of the SNI 1726-2019 design parameters. The largest drift ratio in the time history analysis results in a structural performance level with the Damage Control category. It is concluded that with this category of structural performance level, during a strong earthquake (2500 year period), the structure will experience minor structural damage and can still be repaired to function. Keywords: Performance Based Design, Non-Linier Analysis, Structural Performance Level
ANALISIS KAPASITAS DAN KINERJA HIDRAULIK SISTEM DRAINASE KAWASAN KAMPUS UNDIP TEMBALANG Ikhwanudin Ikhwanudin; Risdiana Cholifatul Afifah; M. Debby Rizani; Agustina Wardani
Journal of Economic, Business and Engineering (JEBE) Vol. 8 No. 1 (2026): October
Publisher : Universitas Sains Al Qur'an

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32500/jebe.v8i1.11524

Abstract

Perkembangan kawasan yang pesat dan peningkatan luas permukaan kedap air di lingkungan kampus dapat secara signifikan mengubah respons hujan–limpasan serta meningkatkan beban hidraulik pada sistim drainase yang telah ada. Penelitian ini mengevaluasi respons hidrologi dan kinerja hidraulik sistim drainase di Kampus Universitas Diponegoro (UNDIP) Tembalang, Semarang, dengan penekanan pada identifikasi lokasi drainase kritis berdasarkan kejadian hujan rancangan kala ulang 5 tahun. Daerah tangkapan kampus seluas 300 ha dianalisis menggunakan data hujan maksimum tahunan dari Stasiun Hujan Pucanggading periode Tahun 1994 sampai dengan Tahun 2025. Analisis frekuensi dilakukan menggunakan distribusi Log Pearson III berdasarkan hasil uji kesesuaian distribusi. Transformasi hujan–limpasan dan simulasi jaringan drainase dilakukan menggunakan Storm Water Management Model (SWMM). Kapasitas pengaliran saluran drainase selanjutnya dievaluasi menggunakan persamaan Manning dan dibandingkan dengan debit puncak hasil simulasi. Hasil analisis menunjukkan bahwa curah hujan rancangan kala ulang 5 tahun sebesar 142 mm. Simulasi SWMM menghasilkan debit puncak PPLH 0,13 m3/dt, FEB 3,88 m3/dt, Jurang Blimbing 0,08 m3/dt, Peternakan 0,12 m3/dt, Tugu Arah LPPU 1,51 m3/dt. Penampang saluran pada PPLH dan FEB sudah mendekati kapasitas yang memadahi walaupun belum bisa menampung debit rancangan dengan baik, sedangkan pada Jurang Blimbing, Peternakan, dan Tugu arah LPPU mengalami defisit kapasitas yang cukup signifikan. Mengingat pesatnya pembangunan gedung pada Kampus UNDIP Tembalang, keterbatasan lahan resapan, tingginya hujan maksimum, maka untuk menunjang sistim drainase yang berkelanjutan, implikasi teknis yang diarahkan pada penerapan rainwater harvesting, kolam retensi, sumur resapan, dan pemanfaatan pavement berpori untuk mereduksi puncak debit dan memperkecil limpasan permukaan.
Co-Authors Adriana Anteng Anggorowati Agung Kristiawan Agus Setiawan Agustina Wardani Etika Herdiarti Etika Herdiarti Farida Yudaningrum Fitria Maya Lestari fitria pra Ibnu Toto Husodo, Ibnu Toto Iin Irawati Ikhwanudin Ikhwanudin Ikhwanudin Ikhwanudin, Ikhwanudin Ikhwanudin Imadudin Harjanto Lintang Enggartiasto M. Debby Rizani Nurti Kusuma Anggraini Pranoto Samto Atmodjo Putra, Dani Pranata Ramadhan, Zhafif Fawwazsatya Ratih Pujiastuti Ratih Pujiastuti Saputra, Nor Dede Dwi Aditya Son Haji Sri Sangkawati Sachro Velma Nindita, Velma Yudaningrum, Farida Yudaningrum, Farida