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All Journal Journal of Advanced Civil and Environmental Engineering
Rinda Karlinasari
Universitas Islam Sultan Agung
Civil Engineering, Building, Construction & Architecture Environmental Science

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The Mineral Characteristic of Tropical Residual Soil using X-Ray Diffraction (XRD) and Scan Electron Microscopy (SEM) Rinda Karlinasari; Paulus P. Rahardjo; Azis Dajaputra
JACEE (Journal of Advanced Civil and Environmental Engineering) Vol 6, No 1 (2023): April
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.6.1.42-56

Abstract

Volcanic residual soil has unique characteristics due to weather and morphological influences. High temperatures and large amounts of rainfall made the rock weathering intense. Landslide events in volcanic residual soil of West Java are quite serious, more than 100 incidents in total a year. Landslides that occur due to unsaturated conditions on the top of the slope become saturated, so it is very important to conduct research on these tropical residual soil weathering zones to define its mineral characterization using Scan Electron Microscopy (SEM) and X-Ray Diffraction (XRD). From the research it was found that the dominant mineral types and contents were Halloysite and Kaolinite minerals. A typical mineral profile is found that is Goethite and Hematite minerals at the soil surface, Carbonate and Chlorite minerals in deeper soils and large amounts of Feldspar minerals in more deep layers. Because there are unique minerals at each depth of soil weathering, zone classification can be done easily starting from the Initial Leaching Zone at the deepest part where there is Feldspar, the Mineral Washing Zone there is Carbonate and Chlorite and the Oxidation Zone on the surface (there are Oxide and Hydroxide minerals). So that it can form a Residual Tropical Volcanic Weathering Profile.
Haunch Beams Behavior And Performance In High-Rise Buildings With Spectrum And Pushover Response Gali Pribadi; Rinda Karlinasari
JACEE (Journal of Advanced Civil and Environmental Engineering) Vol 9, No 1 (2026): April
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.9.1.43-54

Abstract

Indonesia is located in an active tectonic zone with high seismic potential, so that high-rise building structures are very vulnerable to earthquake loads. One alternative to improve structural performance is the use of haunch beams, a non-prismatic beam model with varying stiffness in length. This study examines the effectiveness of haunch beams in improving the seismic performance of the SRPMK system, a 60 m high building without shear walls and with varying column dimensions along the building height. Prismatic beams (50/35) and haunch beams (100/35) with varying lengths of 1/5L, 1/4L, and 1/3L were used in the beam-column connection. The analysis was carried out using the response spectrum method and the nonlinear static pushover method. The results of the pushover analysis study, with the 1/3L haunch beam configuration, provided better structural performance in controlling drift and displacement, especially in high-rise buildings with columns that taper upwards. The nonlinear static procedure method (pushover) showed that the 1/3L haunch beam variant showed the most effective performance. Pushover X, displacement 0.384 m, base shear 18813.17 kN, drift 1.24% ≤ 2%, category IO-LS range, pushover Y, displacement 0.271 m, base shear 18343.3 kN, drift 0.83% ≤ 1%, limit category IO. Smaller drift values indicate increased stiffness of the frame system. B-Haunch 1/3 L provides better structural performance in controlling drift and displacement, especially in tall buildings with columns that taper upwards. Smaller drift values indicate increased stiffness of the frame system. The addition of shear walls later will increase stiffness, making the building structure safer in resisting lateral loads.
Co-Authors Azis Dajaputra Gali Pribadi Paulus P. Rahardjo