Numerical Analisys of Segmental Box Girder’s Stress with Eccentric Tendon Anchoring on Balanced Cantilever Box Girder Bridge

Diagonal crack damage on the web of balanced cantilever box girder bridges has frequently occurred worldwide, including in Indonesia. Previous studies have shown that these cracks can result from additional shear stress caused by prestressed tendon anchoring. In this study, an analysis was conducted using a 2D element model verified through a numerical approach. The evaluation of box girder web stress values was used to assess the potential for cracking and confirm the results of crack mapping conducted on site. The research found that shear stress from prestressed tendon anchoring increases the total shear stress on the box girder web by up to 46.6% of the total shear stress value. The distribution of shear stress from prestressed tendon anchoring is concentrated in the anchoring areas on the top slab and bottom slab sides of the box girder web. The evaluation of principal tensile stress shows that the observed crack locations in the field correspond to areas where the principal tensile stress values exceed the allowable design limit

Ethylene Evaporation Rate Analysis in the Storage Tank and Boil-Off Gas Dispersion: Case Study in PT Lotte Chemical Titan Nusantara

As a primary raw material at PT Lotte Chemical Titan Nusantara (LCTN), ethylene storage is 12,000 tons in icy conditions (- 103.6 °C and 40-80 mbarg) before processing into polyethylene. Ethylene evaporation is inevitable. Therefore, the proper handled of ethylene needs to be settled. The evaporation rate or Boil-Off Rate (BOR) of ethylene is predicted to be 0.0705-0.0730% vol/day, and the Boil-Off Gas (BOG) is 9.41-9.76 tons per day (at 21-40 °C and a tank liquid level of 15.41 meters, approx. 52.51% volume of tank). The BOR is a predicted value of the percentage of volume evaporated daily. When the liquid level is increased, the BOR rate will also be increased. The size of any leaks dramatically impacts the gas dispersion radius. A leak with a 10 mm size at wind speeds of 5 and 10 km/hr resulted in the radius distance of BOG dispersion being 8.2 and 7.7 m, respectively. When the leak hole is ten times bigger, ca. 100 mm, the radius is eight times wider. Fortunately, gas releases happen well above ground level (15.5 meters), causing the cloud to rise, keeping personnel safe. Too low liquid levels ramp up evaporation, risking shortages, while overfilling increases BOG, raising the chance of spills and safety hazards. Hence, managing these variables is crucial to keep operations smooth and safe

INTEGRATION, RELATION, AND RECREATION: RETHINKING ARCHITECTURAL PROGRAMMING

This study rethinks architectural programming as an innovative process, emphasizing the integration of contextual elements, the relational blending of multiple functions, and the adaptive reuse of existing spaces as recreation over time. Moving beyond the traditional understanding of programming as problem-finding-solving, this research redefines it as a dynamic framework bridging theoretical insights and practical design applications. Through a qualitative case study methodology, the paper examines three landmark projects with similar functions by Bjarke Ingels Group—8 House, The Mountain, and Urban Rigger—to explore the transformative potential of programming. The analysis positions programming as an integrative tool that aligns spatial, functional, and contextual dynamics to address both immediate and future architectural challenges. Program mixing with relational functions is conceptualized as a strategic approach that harmonizes diverse functions within a single design, fostering innovative and hybrid solutions. Adaptive reuse, reframed as a multi-time design response, focuses on revitalizing existing structures to meet evolving societal and environmental needs. These case studies illustrate how programming establishes a dynamic framework that enables architects to creatively reimagine constraints as opportunities. By emphasizing the principles of design analysis—realization, organization, and integration—this research contributes to the discourse on programming as a catalyst for architectural innovation and transformation. It proposes a shift in practice that highlights programming as a generative and responsive framework, inspiring a rethinking of architectural methodologies in the face of contemporary challenges

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Analysis of Temporary Preloading for Bridge Approach Embankment to Eliminate Secondary CompressionCase Study: Probolinggo – Banyuwangi Toll Road Construction Project Section 3 STA 40+550 Muhammad Rizal Permadi, Indrasurya B. Mochtar, Noor Endah Mochtar & Reza KazhimiThe Effect of Prefabricated Vertical Drain Length on Soft Soil Settlement (Case Study: The North Ring Road of Lamongan STA. 3+200)Henniko Okadha, Herman Wahyudi, Yudhi Lastiasih & Sifa' UdukhaAnalysis of Excavated Soil Utilization as Embankment Material and Foundation Layer on Singaraja – Mengwitani Road Section (BALI) Dinul Hadi, Ria Asih Aryani Soemitro, Trihanyndio Rendy Satrya & Noor FachrieAnalysis of PVD Installation Methods Due to Limited Vertical Clearance in the Lamongan North Ring Road Construction Project Section 1 STA 0+400 to STA 0+426 Fanny Rumintha Br Barimbing, Yudhi Lastiasih, Herman Wahyudi & Sifa` UdukhaDetermination of Building Assets and Equipment Requirements Based on Sustainable Warehouse Cencepts for PT Kansai Prakarsa Coatings Putri Dewi Purnama & Halla Nur Aziza

Analysis of PVD Installation Methods Due to Limited Vertical Clearance in the Lamongan North Ring Road Construction Project Section 1 STA 0+400 to STA 0+426

The construction of the Lamongan North Ring Road is planned to be built on soft soil. Based on the results of the soil investigation, it is known that the subgrade condition is classified as soft to very soft soil with a depth of 18 meters. One of the problems of this very soft soil is the settlement. Therefore, the National Road Implementation Agency of East Java - Bali Region conducted subgrade improvement using preloading combined with Prefabricated Vertical Drain (PVD). The configuration of the PVD installation is 18 meters deep with a triangular pattern and the distance between PVDs is 1 meter. To stake the PVDs 18 meters deep, a piling rig with a minimum height of 24 meters is required. In the STA 0+400 to STA 0+426 section there is a 150 kV Lamongan - Paciran High Voltage Air Line (SUTT) cable crossing the road with a conductor to platform distance of 18 meters. The existence of this cable is a challenge in the PVD driving as deep as 18 meters. Therefore, this journal will analyze the PVD piling implementation method that can be carried out in this segment. The method carried out in this study is to start with the collection of secondary data such as shop drawings as a reference for the implementation of work in accordance with the planned design. Based on the design plan, an implementation method that can be applied to limited vertical clearance conditions is obtained. Based on the results of the research, an 18-meter deep PVD installation method was obtained that can be applied to limited vertical clearance conditions in the Lamongan North Ring Road construction project Section 1 STA 0+400 to STA 0+426. In addition, it was also found that the time required was 34.75 minutes to stake 1 PVD point using the pulled hole PVD method

Comparison of Ensemble Learning Methods in Classifying Unbalanced Data on the Bank Marketing Dataset

The banking industry is experiencing rapid growth, particularly in telemarketing strategies to increase product and service sales. Despite widespread use, these strategies need higher success rates due to data imbalance, where fewer customers accept offers than those who reject them. This study evaluates machine learning algorithms, including Random Forest, Gradient Boosting, Extra Trees, and AdaBoost, without and handling imbalanced data using the Random Over-Sampling Examples (ROSE) method. The evaluation covers accuracy, precision, recall, F1-score, and AUC of the ROC curve. Results indicate that Random Forest and AdaBoost consistently perform well, with Random Forest maintaining a high accuracy of 91.00% after handling imbalanced data. Gradient Boosting and Extra Trees improve in precision post-oversampling. All models exhibit high AUC values, close to 0.94, demonstrating excellent differentiation between positive and negative classes. The study concludes that addressing data imbalance enhances model performance, making these models suitable for effective telemarketing strategies in the banking sector

Analysis of the Use of a Combination of Soil Embankment and Lightweight Material (Foam Mortar) as an Alternative to Slab on Pile Construction Case Study: Rengat-Pekanbaru Toll Road Construction Project Section Lingkar Pekanbaru-Junction Pekanbaru Sta 19

The soil condition on the Rengat - Pekanbaru Toll Road Sta 193+ 025 - Sta 193+400 which passes through oil palm plantations, swamp areas, and the Siak River, consists of a compressible layer as thick as 7.0 meters. To handle the problem, a 375 m long slab on pile construction was planned with a construction time of 3 months. However, the design was costly; therefore, alternative planning using ordinary piles and a combination of ordinary and lightweight piles was required. The rate of settlement at the study site did not meet the requirements for t = 1 year (< 2cm/year) or t = 10 years (< 10cm/10 years). Therefore, it is necessary to install PVDs with an installation distance of 1.0 meter and a length of 7.0 m. The stability analysis showed that as the percentage of foam mortar increases, the SF value increases. The bearing capacity of the subgrade was increased by installing geotextiles; the number of geotextile layers required at each site varied depending on the height of the embankment and the combination of soil + foam mortar, the thicker the foam mortar, the less geotextile layers were required. The number of reinforcing piles was also planned according to the thickness of the soil and foam mortar variations; the thicker the foam mortar, the less piles were required. In terms of cost, the slab on pile replacement structures that provide savings are geotextile-reinforced soil backfill and a combination of soil backfill with 25% thick foam mortar. Each of these replacement structures provides savings of Rp 40 billion (without foam mortar) and Rp 12.1 billion (with 25% thick foam mortar). For the implementation time, both methods require the same completion time as slab on pile which is 3.5 months

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Parametric Study of Embankment Stability And Geotextile Reinforcement On Soft Soil Mirza Syah Alam, Herman Wahyudi, Yudhi Lastiasih, Yusrizal KurniawanAnalysis Of Slope Stability Based On The Effect Of RainFall On The Lombok International Airport (Bil) – Mandalika Road STA 10+375 to STA 10+550 Made Sudiadnya, Mohamad Khoiri, Dwa Desa Warnana, Herlambang ZulfikarAnalysis of The Effect of Seismic Load on The Design Safety Factor of Foam Mortar with Bored Pile Landslide Location of Batas Pidie/Aceh Besar – Bts. Kota Sigli STA 0+560 Ichvan Danny Kurniawan, Trihanyndio Rendy Satrya, Ria Asih Aryani Soemitro, Fikri AfzalA Study of Pile Displacement in Soft Soil: The Case of Semarang - Demak Toll Road Construction Package 1B Novera Sagita, Herman Wahyudi, Yudhi Lastiasih &Yusrizal KurniawanDesign Of Toll Road Embankment With Secondary Compression Mitigation After PVD Installation And Solutions For The Probolinggo – Banyuwangi Toll Road Construction Project PackKAGE 2 STA 16+300 – STA 16+700 Septya Kukuh Aryandi, Indrasurya B. Mochtar, Noor Endah, Abdjad Agung Artant

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Handling Selection of Compression And Stability Problems of Embankment Based on The Thickness of Soft Soil Layer Below (Case Study: Rengat – Pekanbaru Toll Road Project Sta. 176+775 – Sta. 176+975) Pandu Hermawan, Noor Endah Mochtar, Indrasurya B. Mochtar, & Mahar MuliawanSlope Stability Analysis Under Dry-Wetting Cycle Conditions (Case Study: Landslide Countermeasure of Batas Pidie/Aceh Besar - Batas Kota Sigli)Zulfadhli, Trihanyndio Rendy Satrya, Ria Asih Aryani Soemitro & Fikri AfzalAlternative Planning Slope Stabilization On Roadway Case Study : Landslide On Tabone-Polewali Road Section KM 168+790 to 168+820 Ismi Istiqamah, Mohamad Khoiri, Mahendra Andiek Maulana & Bambang S. RazakStudy of The Behavior of Abutment Piled Foundation due to Nearby Staged-Embankment (Case Study: Kali Kandang Bridge on The North Ring Road of Lamongan) Azkiya Nabila, Trihanyndyo Rendy Satrya, Ria Asih Aryani Soemitro, Sifa UdukhaBehaviour Study of Abutment Pile Foundation on Lightweight Embankment Oprit(Case Study: Kali Otek Bridge – Lamongan North Ring Road Construction Package Section 2)Nila Wahyu Pertiwi, Ria Asih Aryani Soemitro, Trihanyndio Rendy Satrya, Sifa' Udukh

Slope Stability Analysis Under Dry-Wetting Cycle Conditions (Case Study: Landslide Countermeasure of Batas Pidie/Aceh Besar - Batas Kota Sigli)

A landslide occurred on National Road Section Bts. Pidie/Aceh Besar - Bts. Kota Sigli Sta. 0+500 during the peak of the rainy season has resulted in the disruption of traffic lanes. Soil samples were obtained from the landslide site for inclusion in the testing process. The laboratory tests encompass a range of physical and mechanical parameters and also dry-wetting procedures. The result shows that the topsoil layer consists of sandy silty clay with medium plasticity. Then, a dry-wetting cycle was conducted to simulate the dry and rainy season by introducing and reducing water content from the initial condition (wi) to saturated (wsat) and to airdried (wairdry) with 25%, 50%, 75%, and 100% interval. The results showed a decrease in unconfined compressive strength (qu) by 22.70% and negative pore water pressure (-Uw) by 53.14%. Slope stability analysis found that the slope was stable after the landslide with an FS value of 1.380 and increased to 1.410 when there was the addition of slab on pile road construction. The addition of rainfall variations for 3 and 5 hours is insignificant to the stability of the slope due to the groundwater table being too deep to affect pore water pressure