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RISS 인기검색어
- 검색키워드
- 저자 : Rubio Christabel Jane P. (검색결과 4 건)
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Performance-based Analysis of Code-base Designed Structures in the Philippines
Rubio. Christabel Jane P,Tabong. Kristoffer Dave A.,Lucio. Mark Elson C.,Jeong. Sangman 한국방재학회 2017 한국방재학회논문집 Vol.17 No.3
본 연구에서는 비선형등가정적해석법(nonlinear static pushover analysis)을 사용하여 지진 발생시 예측 가능한 성능 요건을 충족시키는 코드 기반 설계 구조의 기능을 조사하였다. 이는 SAP2000을 사용하여 Makati Science High School (MSHS)건물의 골조 구조를 개발함으로써 수행되었다. 이후, Applied Technology Council (ATC)에서 제공된 콘크리트 건물의 내진평가 및 보강에 대한 코드인 ATC-40 조항에 따라 비선형등가정적해석법이 수행되었다. 이 분석을 통해 pushover curve를 얻었으며, 이 그래프는 모든 분석단계에서 구조물의 변위에 따른 소성힌지의 위치 및 상태를 나타낸 것이다. 필리핀의 대부분 학교건물은 일반적으로 대피소로 사용되기 때문에 Immediate Occupancy(IO)성능기준을 만족하기 위해 ATC-40에서 제공된 허용 기준과 pushover curve를 비교하였다. 비교결과 분석을 통해, MSHS 건물은 지진발생시 비상대피소로의 기능을 수행할 수 있는 것으로 평가되었다. 본 연구는 코드기반으로 설계된 건물의 변수와 IO 성능기준의 관계를 이해하는데 기여할 수 있다. 또한, 비선형등가정 적해석절차를 이용하여 지진발생시 MSHS 건물에 미치는 손상 결과를 예측할 수 있다. The ability of code-base designed structures to meet predictable performance requirement in an event of an earthquake was investigated in this study using nonlinear static pushover analysis. This was performed by developing the structural framework of Manila Science High School (MSHS) building using SAP2000. Subsequently, a nonlinear static pushover analysis according to the provisions of ATC-40, a code provided by the Applied Technology Council (ATC) on Seismic Evaluation and Retrofit of Concrete Buildings was performed. The analysis generated a pushover curve, a graph that displays the total drift of the structure versus base shear and the possible location and condition of the plastic hinges at every step of the analysis. Results were compared with the acceptable criteria provided by ATC-40 for Immediate Occupancy (IO) performance level since most school buildings in the Philippines are commonly used as evacuation centers. By analyzing the results, it was found out that the MSHS building will behave at Immediate Occupancy after an earthquake event. This study can contribute in verifying if the parameters used in code-base designed structures satisfy the requirements for IO performance level. Also, this study can estimate the possible post-earthquake damage effects on the MSHS building by using the nonlinear static analysis procedure.
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Pilot Early Warning System of the University of Santo Tomas
Rubio.Christabel Jane P,Poblete.Shikara,Jose.Malcolm L.,Ban. Jeevan Kumar 한국방재학회 2016 Journal of Disaster Management Vol.1 No.3
During typhoon season, the University of the Santo Tomas (UST) and its outlying areas are the most susceptible to floods in Manila. In line with this, a model was developed in order to generate a more realistic flood simulation. Storm Water Management Model (SWMM) was utilized for the hydrologic modeling of surface run-off. A flood forecasting and early warning system was developed for UST which is located at España Boulevard, Sampaloc, Manila to aid the Thomasian community in times of rainfall events. This study aimed to determine the flood volume within and surrounding the university, to generate inundation reports for 5yr, 15yr, 25yr and 50yr return periods, and to plan a framework for the sensor and broadcasting device integrating the resulting critical amount of rainfall. The data processing was divided into two sequence: accumulate hydrologic data and plot study area input. Accumulation of hydrologic data includes gathering of rainfall data and drainage properties while plot of study area is the actual modelling of the study area in SWMM. Lead time and critical amount of rainfall needed were obtained after a successful simulation of the model. The resulting initial flood occurrence and flood volumes were applied in the proposal of a flood warning system for the University of Santo Tomas. After the simulation and data analysis, the lead time and critical amount of rainfall attained in this study using SWMM, presented advantageous outcomes to predict flooding in the UST. Moreover, the resulted values were suitable for integration on a web-based flood warning system.
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Synthetic Streamflow Generation Using Autoregressive Modeling in the Upper Nakdong River Basin
오국열,Rubio, Christabel Jane P.,Ryu, Jae H.,정상만 한국방재학회 2010 한국방재학회논문집 Vol.10 No.1
The analysis and synthesis of various types of hydrologic variables such as precipitation, surface runoff, and discharge are usually required in planning and management of water resources. These hydrologic variables are mostly represented using stochastic models. One of which is the autoregressive model, which give promising results in time series modeling. This study is an application if this model. The main purpose of this study was to determine which AR model best represents the historical monthly streamflow of the two gauging stations, namely Andong Dam and Imha Dam, both located in the upper Nakdong River Basin. AR(3) model was found to be the best model for both gauging stations. Parameters of the determined order of AR model (and ) were also estimated. The simulated result using the AR(3) model reproduced the historical data fairly.
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PHYTOREMEDIATION POTENTIAL OF IXORA COCCINEA IN PB CONTAMINATED SOILS
Sacramento. Jan Vincent A,Javier. Karlo John,Geronimo. Franz Kevin F,Cleofas. Dolores. S.D,Rubio Christabel Jane P. 한국방재학회 2017 Journal of Disaster Management Vol.2 No.3
Numerous methods have been operated to relieve the environment of contamination of heavy metals. One of which is the use of chemical and thermal technology. However, this method was proven to be costly and operates far less than the optimum. It was discovered that plants can detoxify soils, therefore resulting in cleaner groundwater free from heavy metal contamination, a method referred to as phytoremediation. In this study, the ability of Ixora Coccinea to aid in phytoremediation was evaluated. Sixty-day old Ixora Coccinea plants were replanted in pots containing 1.3kg of soil mixed thoroughly with a lead (Pb) and distilled water solution with a concentration of 16.9 mg/ml. Every 15 days, for a period of 90 days, three plants were harvested for laboratory analysis testing. The samples were acid digested and analyzed of its Pb content using Inductively Coupled Plasma (ICP). The reduction of Pb gradually increased with respect to time, attaining a maximum of 38.1% reduction on day 60 of culture, but declined afterwards. On average, the Pb uptake rate of Ixora Coccinea was 15.3%. In a patch of land, plants spaced 240mm away from each other would absorb a maximum of 127.1 mg/kg of Pb with a depth of 200mm.
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