scholarly journals Landslide Potential Evaluation Using Fragility Curve Model

2020 ◽  
Author(s):  
Yi-Min Huang ◽  
Tsu-Chiang Lei ◽  
Bing-Jean Lee ◽  
Meng-Hsun Hsieh
Keyword(s):  
Disaster Response ◽  
Evaluation Method ◽  
Ground Surface ◽  
Shallow Landslide ◽  
Fragility Curve ◽  
Geological Environment ◽  
Damage State ◽  
Accumulated Rainfall ◽  
Steep Topography ◽  
Potential Evaluation

The geological environment of Taiwan mainly contains steep topography and geologically fragile ground surface. Therefore, the vulnerable environmental conditions are prone to landslides during torrential rainfalls and typhoons. The rainfall-induced shallow landslide has become more common in Taiwan due to the extreme weathers in recent years. To evaluate the potential of landslide and its impacts, an evaluation method using the historical rainfall data (the hazard factor) and the temporal characteristics of landslide fragility curve (LFC, the vulnerability factor) was developed and described in this chapter. The LFC model was based on the geomorphological and vegetation factors using landslides at the Chen-Yu-Lan watershed in Taiwan, during events of Typhoon Sinlaku (September 2009) and Typhoon Morakot (August 2009). The critical hazard potential (Hc) and critical fragility potential (Fc) were introduced to express the probability of exceeding a damage state of landslides under certain conditions of rainfall intensity and accumulated rainfall. Case studies at Shenmu village in Taiwan were applied to illustrate the proposed method of landslide potential assessment and the landslide warning in practice. Finally, the proposed risk assessment for landslides can be implemented in the disaster response system and be extended to take debris flows into consideration altogether.

Seismic Fragility Analysis of Reinforced Concrete Frames with Service Life

2012 ◽  
Vol 446-449 ◽  
pp. 2313-2316
Author(s):  
Li Li Yuan ◽  
Jian Min Wang ◽  
Neng Jun Wang ◽  
Wen Ting Jiang
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Fragility Curve ◽  
Seismic Fragility ◽  
Concrete Frames ◽  
Damage State ◽  
Reinforced Concrete Frames ◽  
Nonlinear Mechanical ◽  
Interstorey Drift ◽  
Definition Of

An analytical method to obtain the seismic fragility curve of reinforced concrete frames with service life was proposed in this paper. Considering the variation of nonlinear mechanical characteristics of un-carbonated concrete with service life, the seismic fragility curve of frames was developed based on the interstorey drift corner in the weak storey of frame structures. According to the damage state definition of frames, each seismic fragility curve reflects the probability tendency of the defined damage state happening in frames with service life. It is helpful for the seismic performance analysis of reinforced concrete frames to use the proposed method.

scholarly journals The Fast Potential Evaluation Method of Enhanced Oil Recovery Based on Statistical Analysis

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 795
Author(s):  
Zhengbo Wang ◽  
Qiang Wang ◽  
Desheng Ma ◽  
Wanchun Zhao ◽  
Xiaohan Feng ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Evaluation Method ◽  
Enhanced Recovery ◽  
Chemical Flooding ◽  
Recovery Method ◽  
Steam Flooding ◽  
Tertiary Oil Recovery ◽  
Similarity Ratio ◽  
Potential Evaluation ◽  
Target Block

Based on a large number of empirical statistics of tertiary oil recovery technology in China, including polymer flooding, chemical flooding, gas flooding, in situ combustion, steam flooding, ect., 22 key reservoir parameters were filterized. Five levels of quantitative screening criteria were developed for different tertiary oil recovery methods. The mean algorithm for the downward approximation and the grey correlation theory were used in this paper to quickly select the appropriate tertiary oil recovery method for the target blocks, which provides a preferred development method for subsequent potential evaluation. In the rapid analogy evaluation method of tertiary oil recovery potential, the total similarity ratio between the target block and the example block is determined. The target block is matched with the appropriate instance block according to the total similarity ratio value, using 80% as the boundary. The ratio of the geological reserves is used to predict the oil recovery interval, the actual annual injection data, and the economic profit, thus quickly predicting the economic potential of the tertiary oil recovery technology in the target block. Currently, our research team has integrated these two methods into the tertiary oil production potential evaluation software EORSYS3.0. The empirical analysis shows that this method is reasonable and the conclusion is reliable. In addition, the actual enhanced recovery value is within the effective range predicted by the method. The method and results of this paper will provide an important decision-making reference for the application and sustainable development of China Petroleum’s main tertiary oil recovery technology in the next 5–10 years.

scholarly journals Research on Interaction Potential Evaluation Method of User-side Resources Accessing Energy Internet

2020 ◽  
Vol 446 ◽  
pp. 022060
Author(s):  
Yufeng Chai ◽  
Xianzhong Dai ◽  
Xiaoling Jin ◽  
Yan Zhang ◽  
Xinyang Han ◽  
...  
Keyword(s):  
Interaction Potential ◽  
Evaluation Method ◽  
Energy Internet ◽  
Potential Evaluation

Proposal on risk assessment of reinforced concrete structures subjected to explosive loads

2017 ◽  
Vol 8 (3) ◽  
pp. 407-432 ◽  
Author(s):  
Makoto Nagata ◽  
Masuhiro Beppu ◽  
Hiroyoshi Ichino ◽  
Harumi Yashiro
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Evaluation Method ◽  
Fragility Curves ◽  
Reinforced Concrete Structure ◽  
Explosive Load ◽  
Damage State ◽  
Hazard Curve ◽  
The Relationship ◽  
Terrorist Bombing

This study proposes an evaluation method to assess the risk of a reinforced concrete structure subjected to an explosive load such as that resulting from a terrorist bombing attack. First, a hazard curve that represents the relationship between the frequency of explosive incidents and the explosive mass was evaluated based on the statistics of terrorist bombing incidents. Second, to evaluate the damage state of the reinforced concrete structure due to the explosive load, fragility curves for the reinforced concrete members, such as beams, columns, and slabs, were evaluated using a single-degree-of-freedom model and a rotational capacity–based criterion. The fragility curve shows the relationship between the damage probability level, such as “no damage,” “small damage,” “collapse,” and an explosive mass. The total failure probability of the reinforced concrete structure was estimated by superposing the fragility curves of the members and by incorporating the reducing effect of floor slabs in the reinforced concrete structure on the blast load. A loss curve was drawn based on the damage state of the reinforced concrete structure by assuming the number of human lives lost and the reinforced concrete structure in each damage state. A risk curve was then derived by combining the hazard curve with the loss curve.

Seismic Fragility Analysis of Reinforced Concrete Frames within Service Life

2012 ◽  
Vol 166-169 ◽  
pp. 2391-2394
Author(s):  
Neng Jun Wang ◽  
Jian Min Wang ◽  
Wen Ting Jiang
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Fragility Curve ◽  
Seismic Fragility ◽  
Concrete Frames ◽  
Damage State ◽  
Reinforced Concrete Frames ◽  
Nonlinear Mechanical ◽  
Damage States ◽  
Change Tendency

An analytical method was proposed to obtain the seismic fragility curve of reinforced concrete frames within the service life. Considering the variation law of nonlinear mechanical characteristics of un-carbonated concrete within service life, the seismic fragility curve of frames was developed based on the inter-storey drift corner in the weak storey of frame structures. According to the defined frame damage states, each seismic fragility curve reflects the probability change tendency of the defined damage state in frames within service life. A numerical example was modeled to illustrate the variation characteristic of seismic fragility within the service life.

scholarly journals Surface electromyography: proposal of a protocol for cervical muscles

Revista CEFAC ◽  
2011 ◽  
Vol 14 (5) ◽  
pp. 918-924 ◽  
Author(s):  
Klyvia Juliana Rocha de Moraes ◽  
Daniele Andrade da Cunha ◽  
Luciana Ângelo Bezerra ◽  
Renata Andrade da Cunha ◽  
Hilton Justino da Silva
Keyword(s):  
Surface Electromyography ◽  
Evaluation Method ◽  
Electrical Potential ◽  
Electrical Signal ◽  
Target Area ◽  
Specific Therapy ◽  
Cervical Muscles ◽  
Signal Parameters ◽  
Potential Evaluation ◽  
Detailed Protocol

PURPOSE: to present a proposal of a surface electromyography evaluation method for cervical muscles specific and detailed protocol, with a standardized collection method of electrical signal in these muscles. METHODS: the researchers took as reference the existing publications about this subject which evidenced a need for standardization, clarity, better reproducibility and greater specificity for the surface electromyography evaluation of the upper trapezium and sternocleidomastoid muscles fibers. The proposal preparation process for the current protocol included the cleaning of the target area, placing the electrodes, required tasks in order to collect and register the electrical signal and interpretation of the electromyography signal parameters. This evaluation method was carried out in 24 healthy volunteers of both genders, with an average age of 26 years. We used the electromyography Miotool 400 with 4 channels. RESULT: an evaluation surface electromyography method for upper trapezium and sternocleidomastoid muscles fibers was developed and tested in order to determine the best form of electrical signal data collection for these muscles. CONCLUSION: we submitted a protocol proposal to evaluate the cervical muscles by a surface electromyography, allowing the healthy professionals and researchers to get more information about this electrical potential evaluation method for the sternocleidomastoid and the upper trapezium muscles fibers. This knowledge will be an adjuvant in a more specific therapy.

Potential Evaluation Method of Carbon Dioxide Flooding and Sequestration

2019 ◽  
pp. 311-331
Author(s):  
Yongle Hu ◽  
Mingqiang Hao ◽  
Chao Wang ◽  
Xinwei Liao ◽  
Lina Song
Keyword(s):  
Carbon Dioxide ◽  
Evaluation Method ◽  
Potential Evaluation ◽  
Carbon Dioxide Flooding

scholarly journals Fundamental study on an evaluation method for the geological environment with spatially heterogeneous characteristics

2005 ◽  
Vol 47 (4) ◽  
pp. 451-470 ◽  
Author(s):  
Koichi YANAGIZAWA ◽  
Seietsu TAKEDA ◽  
Hideaki OSAWA ◽  
Yasuhiro SUYAMA ◽  
Mitsuaki FURUICHI ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Geological Environment ◽  
Fundamental Study

scholarly journals Fragility functions for performance-based ground failure due to soil liquefaction

2017 ◽  
Author(s):  
Brett Maurer
Keyword(s):  
Land Use Planning ◽  
Ground Surface ◽  
Lateral Spreading ◽  
Soil Liquefaction ◽  
Hazard Mapping ◽  
Fragility Functions ◽  
Damage Potential ◽  
Damage State ◽  
Site Assessment ◽  
Ground Failure

The severity of liquefaction manifested at the ground surface is a pragmatic proxy of damage potential for various infrastructure assets, making it particularly useful for hazard mapping, land-use planning, and preliminary site-assessment. Towards this end, the recent Canterbury, New Zealand, earthquakes, in conjunction with others, have resulted in liquefaction case-history data of unprecedented quantity and quality, presenting a unique opportunity to rigorously develop fragility-functions for liquefaction-induced ground failure. Accordingly, this study analyzes nearly 10,000 liquefaction case studies from 23 global earthquakes to develop fragility functions for use in performance-based frameworks. The proposed functions express the probability of exceeding specific severities of liquefaction surface manifestation as a function of three different liquefaction damage measures (LDMs), wherein four alternative liquefaction-triggering models are used. These functions have the same functional form, such that end-users can easily select the model coefficients for the particular damage state, triggering model, and LDM of their choosing.It should be noted that these functions are not to be used to predict lateral spreading, which requires LDMs other than those assessed herein. Lastly, the proposed functions are preliminary and subject to further development. In this regard, several thrusts of ongoing investigation are discussed.

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