A5048210592- Geotechnical Engineering and Soil Stabilization
- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Soil Mechanics
- Geotechnical and construction materials studies
- Geotechnical Engineering and Analysis
- Geological and Geophysical Studies
- Rock Mechanics and Modeling
- Structural Load-Bearing Analysis
- Engineering Structural Analysis Methods
- Structural Behavior of Reinforced Concrete
- Grouting, Rheology, and Soil Mechanics
- Seismic Waves and Analysis
- Tunneling and Rock Mechanics
- Seismic Performance and Analysis
- earthquake and tectonic studies
- Soil and Unsaturated Flow
- Fluid Dynamics Simulations and Interactions
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Coastal and Marine Dynamics
- Landslides and related hazards
- Dam Engineering and Safety
- Drilling and Well Engineering
- Structural Engineering and Vibration Analysis
- Geophysical Methods and Applications
- Probabilistic and Robust Engineering Design
University of Indonesia
2015-2024
Cornell University
2000-2002
Hollister (United States)
2001-2002
American Society of Civil Engineers
1999-2001
An overview is presented of research at Cornell University on reliability-based design (RBD) foundations for transmission line structures (TLS). Under sponsorship the Electric Power Research Institute (EPRI), Empire State Energy Corporation (ESEERCO), and others, a long-term effort was conducted to develop comprehensive RBD methodology TLS in both soil rock under uplift, compression, lateral/moment loading. The results these studies are described herein conceptual form, illustrating basic...
Raft foundations enhanced with deep foundation elements (typically piles), simply known as piled rafts, were examined to develop a more integrated, displacement-based, design methodology. Illustrative rafts analyzed using simplified linear elastic and nonlinear plane strain finite element models. The effects of raft pile group system geometries compression capacity evaluated on the "average" differential displacements, bending moments, butt load ratio rafts. results synthesized into an...
In this paper a new empirical relation between the unconfined compressive strength of intact rock and end bearing capacity drilled shafts in is developed. addition, an analytical mass developed to explicitly consider effect discontinuities. Specifically, database 39 load tests used derive rock. The derived indicates that factor, Nc, which ratio capacity, qmax, strength, σc, rock, decreases with increasing σc. This contrast many existing relations assuming constant Nc values. Since from...
This study evaluates the effectiveness of earthquake drains in mitigating liquefaction and examines their performance at specific frequencies loose medium-dense sediments. Two lab-scale shake table single-axis test series were conducted to assess this: one without mitigation another using drains. Both models instrumented subjected consistent shaking sequences 1 Hz 1.2 frequencies. The results revealed reduced excess pore-water pressure generation around due rapid dissipation pore pressures...
Site investigation and the interpretation of site data are necessary aspects sound geotechnical practice. As such, characterization geotechnical variability should play a central role in reliability-based design. This chapter discusses uncertainties associated with most basic soil/rock property evaluation task, which is to estimate a design parameter from field test. The coefficient variation estimate must be function natural site, measurement error associated with the test, transformation...
The interaction between moisture content and soil suction is commonly represented by a soil–water characteristic curve (SWCC). direct measurement of water can be easily achieved, but it usually requires destructive method where the sample needs to oven-dried. Hence, indirect employed for monitoring purposes. limitation this approach variability in at wilting point, particularly plants different types soil. While point varies greatly, typically around 1500 kPa despite varying slightly...
Bearing capacity solutions are presented for strip footings on jointed rock masses with one and two sets of discontinuities. The employ a lower bound bearing model coupled simple discontinuity strength model. the material discontinuities, number orientation sets, evaluated explicitly. results as factor charts that illustrate significant effects geometric parameters. trends agree well those obtained from other models. solution is straightforward, it can be implemented manually or in any...
Abstract Study of compressive strength oil palm shell (OPS) concrete has been conducted by varying the content admixture silica fume and fly ash to increase strength. Digital Image Correlation (DIC) was used as a tool capture physical change cube during test which can be converted load-displacement response using open source sotware, Ncorr. It is evident that DIC carried out with ordinary camera DSLR reveal from result. Poison’s ratio between lateral vertical displacement succesly obtained....
Palu City is an active seismic area in Indonesia due to the very Palu-Koro fault system.The development of city area, therefore, must consider risks induced by activities.The risk assessment has be supported information on subsurface characteristics.The aim this study investigate characteristics considering value V s30 (top 30 m shear-wave velocity).This parameter been related estimation site's ground shaking during occurrence earthquake.The measurements taken deep soil sediment include...
In designing foundation, there are three fundamental requirements namely: ultimate limit state (ULS), serviceability (SLS), and economics. Generally, the ULS SLS focus of design process, while cost factors not explicitly considered. This paper deals with minimum construction as controlling objective. A wide range sand density conditions considered, typical checks available in literature employed. The optimization tool used is Solver add-in function MS-Excel™. effects different structures...
Abstract Land subsidence phenomena which occurred in last 30 years Jakarta affected by groundwater extraction, settlement of high compressibility soil such as marine clay, natural consolidation alluvial or tectonic subsidence. Over the period 1982–1997, from 20 to 200 cm, with rates about 1 15 cm/year, several places. This paper discusses induced land shallow clay deposits on Kamal Muara area, based pore water pressure changes piezometer’s measurement located at 19 meters and 32 depth....
Cement column reinforcement is a method of soil used in the field to increase soil's shear strength and decrease compressibility. A set laboratory studies effect cement on an undrained condition was conducted kaolinite clay by using triaxial apparatus simulate real conditions. For testing, samples were made extruder. Afterward, make composite samples, sample cores bored create holes 5 mm diameter 50 long, filled with slurry. The samples' reinforcements cured for seven, 14, 21 days. Then,...
Experimental study was carried out on three low confinement spun piles to pile cap connections. The detail followed the typically fixed connection in Indonesia. Reinforced concrete filled strengthen region, except SPPC01. Different types were used, shrinkage and non-shrinkage for SPPC02 SPPC03, respectively. SPPC03 could reach targeted drift of 3.5% whereas SPPC01 stopped at a 2.75%. There no shear failure detected during test. behaved as indicated by fracture prestressed bars near region....
Abstract The resistance of sandy soil against liquefaction is influenced by its grain size and relative density. This study investigates the potential for settlement resulting from liquefaction. A single axis shaking table was employed, with a displacement 2.5 cm box measuring 400 mm long, wide 600 height. Various densities were evaluated, namely 40%, 50%, 60%, 70%, along 1 Hz 1.2 seismic frequency variations. experiment used three pore pressure transmitter sensors to measure increase in...
The Palu 28 September 2021 M 7.5 Earthquake has brought several new challenges to the understanding of liquefaction and its following geotechnical phenomena. In addition, that main shock was followed by a series aftershocks within short time frame. common conditions area include layered soils conditions, associated variability exists. This paper reports dynamic effective stress analysis (ESA) study four different liquefiable sand columns, above three (layered soils, variability, aftershocks)...