A5023598088- Seismic Performance and Analysis
- Vibration Control and Rheological Fluids
- Geotechnical and construction materials studies
- Structural Engineering and Vibration Analysis
- Structural Health Monitoring Techniques
- Geological and Geophysical Studies
- Vibration and Dynamic Analysis
- Earthquake and Tsunami Effects
- Infrastructure Maintenance and Monitoring
- Geophysics and Sensor Technology
- Environmental Engineering and Cultural Studies
- Evacuation and Crowd Dynamics
- Drilling and Well Engineering
- Geotechnical Engineering and Underground Structures
- Coastal Management and Development
- Coastal and Marine Dynamics
- Management and Optimization Techniques
- Structural Load-Bearing Analysis
- Recycled Aggregate Concrete Performance
- Seismic and Structural Analysis of Tall Buildings
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geotechnical Engineering and Soil Stabilization
- Railway Engineering and Dynamics
- Fluid Dynamics and Vibration Analysis
- Decision Support System Applications
National Nuclear Energy Agency of Indonesia
2022-2024
National Research and Innovation Agency
2022-2024
Badan Pengkajian dan Penerapan Teknologi
2017-2021
Ministry of Health
2012
Kyoto University
2002-2009
Marymount University
2009
International Institute of Earthquake Engineering and Seismology
2008
Engineering Systems (United States)
2003
Pseudo-negative-stiffness dampers or PNS are controlled variable that produce negative-stiffness hysteretic loops. Negative-stiffness loops advantageous since usually set parallel to structure's members, which have stiffness. By adding loops, artificial nonlinearity is obtained but the total force would not be larger than member's stiffness force. Common passive members will Moreover, applications of damping benchmark control problems for seismic response reduction also reported. The...
Abstract Effectiveness of passive and semi‐active seismic response control on a cable‐stayed bridge was studied by numerical analyses. An existing which has fixed‐hinge connections between deck towers is modeled its were replaced isolation bearings dampers. The are elastic hysteretic type. dampers linear variable damper uses that incorporates pseudo‐negative stiffness algorithm. A loop produced the damper, combined with positive curve deck‐tower connections, creates nearly rigid–perfectly...
This paper describes the results of a comprehensive analysis for tsunami disaster mitigation in Padang City, Indonesia. Assessment consists several steps, starting from construction hazard maps based on most probable earthquake scenario future. Results are then analyzed to determine impact residential population along potential evacuation routes. Next, standpoint hazards, we move human’s vulnerability during evacuation. The term “vulnerability” is associated with available time. Here,...
Abstract The effectiveness of a variable damper employing pseudo‐negative stiffness control on benchmark cable‐stayed bridges was studied. Combination hysteretic loop produced by the plus elastic deck‐tower connections produces that approaches rigid perfectly plastic force–deformation characteristics with large damping ratio. advantage is sensors are required only at to measure relative displacements. Moreover, small amount and simple algorithm reduce source errors uncertainties. Comparisons...
Research shown in this paper is focused on the development of an autonomous semi-active control laws as simplified algorithms for seismic response reduction. The strategy methods to produce desirable hysteretic loops absorb much energy possible by devices. method requires information only device's displacement and velocity. produced herein provide absorption capacity similar those friction dampers, while minimizing disadvantages such residual after strong earthquakes generation...
Abstract The linear quadratic regulator (LQR) control algorithm is at the heart of many modern design methods. There have been numerous publications dealing with LQR and earthquake engineering. However, very few papers discuss hysteretic loops produced by force, although in engineering field, key part seismic designs. This paper shows importance investigating force for response, proposes a method to reproduce much simpler algorithm. investigation was carried out on cable‐stayed bridge model...
The angular-mass damper referred herein is a wheel that has concentrated mass on its perimeter. rotational inertia of the employed to dampen relative acceleration between two joints. application this kind civil engineering structures would be practical since works passively. Since angular much more significant than translational mass, does not significantly increase earthquake-induced force. To study effectiveness device in seismically excited structures, applied base-isolated benchmark...
In this paper, we propose a simple control approach to produce negative stiffness hysteretic loops for the response of base-isolated bridges. The combination controller with those bearing results in virtually rigid perfectly plastic force–deformation characteristics possessing large damping ratio without transmitting excessive force other structural members. proposed has potential be implemented as passive approach. application benchmark problem seismically excited highway bridge been...
Purpose The paper aims to study the effects of tsunami that affected Banda Aceh in 2004. Design/methodology/approach During a survey by Japanese researchers and surrounding areas Indonesia after great Sumatra earthquake, questionnaires were distributed people earthquake tsunami. purpose was collect information what happened expected be safe against future consisted questions asking their experience during Findings One important result shows even if had started running away just big...
Railway infrastructure maintenance is essential in implementing the transportation system. Most of these railway bridges have suffered gradual deterioration over time. Predictive structural health monitoring (SHM) required by installing instrumentation sensors on to determine condition bridge at site. This research aims analyze and assess existing steel understand load-deformation characteristics, bearing capacity, dynamic response structure. paper describes a valuable method for assessing...
Pada tanggal 5 Agustus 2018 terjadi gempa dengan kekuatan M7,0 di daratan Pulau Lombok kedalaman 10 km. Gempa menimbulkan kerusakan yang signifikan pada bangunan-bangunan baik bangunan rumah maupun gedung. Salah satu banyak rusak adalah masjid. Karena masjid merupakan digunakan untuk umum dan memiliki karakteriktik struktur khas, maka kajian dipusatkan Masjid-masjid dikaji mengalami tapi tidak runtuh, sehingga perolehan data dapat dilakukan misalnya berupa kuat tekan beton, dimensi tulangan,...
<title>Abstract</title> The concept of a pseudo-negative stiffness (PNS) damper using fluid viscous variable has been introduced since early 2000s, which employed semi-active control to produce PNS hysteretic loops by damper. were proven be effective in reducing the seismic response structure. In this research, development passive system capable producing loop is reported. based on damping. To passively, tube modified so that damping force controlled flow between piston and providing grooves...
Active and semi-active control methods for reduction of the dynamic response structures are emerging some being implemented in buildings bridges. This vast growing technology ows to recent developments sensing digital techniques. Semi-active is a promising approach seismic which offers adaptability active without requiring associated large power sources, since external energy only used modify properties (e.g., stiffness, damping, friction level) device during an earthquake attack. Therefore,...
Kota Pariaman di Sumatra Barat termasuk ke dalam zona bahaya gempa dan tsunami. ini hanya memiliki 12 Tempat Evakuasi Sementara (TES) tsunami yang belum mampu mengakomodasi semua permukiman rawan Penelitian tentang penentuan lokasi TES tambahan telah dilakukan menghasilkan 21 buah usulan menurut metode network analysis. tersebut berada sepanjang pesisir Sehingga mutlak bersifat tahan Pembangunan membutuhkan informasi percepatan puncak permukaan tanah. ditujukan untuk menentukan respon...
Scientists have widely used remote sensing technology to observe surface phenomena, either happened by naturally or artificially. Land subsidence monitoring is one of the promising discoveries made implementing technology, particularly with radar images. The gap in image processing has been attempted solve this study a real case Jakarta, Indonesia. challenge simplifying complex step that involved different correction due time acquisition images explained study. Aside from that, many...
Jakarta as the capital of country has a lot buildings. The number multi-story buildings with height more than nine floors reaching 700 Meanwhile, is also not free from threat earthquakes. According to Ministry Public Works, was in zoning moderate seismicity level. However, it does avoid possibility occurrence large earthquakes, i.e. level 2500 year earthquake. A seismic 500 years probability would produce an earthquake tremor that felt Padang September 2009, which around MMI VII VIII....