scholarly journals Emergency Communication and Quick Seismic Damage Investigation Based on Smartphone

2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Ruicong Han ◽  
Xuefeng Zhao ◽  
Yan Yu ◽  
Quanhua Guan ◽  
Deli Peng ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Seismic Damage ◽  
Field Investigation ◽  
Emergency Communication ◽  
Investigation Method ◽  
Emergency Rescue ◽  
Rescue Workers ◽  
Communication Module ◽  
Seismic Index ◽  
Damage Investigation

The communications in the quake-hit area are always cut off from the outside after the earthquake, and the traditional seismic field investigation method calls for immense time to accomplish house-to-house investigation, which goes against timeliness of the emergency rescue. In this paper, an emergency communication and quick seismic damage investigation method based on smartphone is proposed. Towards this, an application, E-Explorer, on iOS platform is initially developed. First, in the emergency communication module, the communication is available by using the Multipeer Connectivity Framework technology even without external network. A series of validation experiments are simulated without external network, and the results prove convincing. This module enhances the possibility of communication and increases the chances for rescue. Second, in the damage investigation module, E-Explorer integrates the functions of questionnaire and picture collection for damage phenomenon recording and image acquisition, following an intensity evaluation method according to seismic index. Last, a website, which provides guidance for rescue workers and collects damage information for quick intensity evaluation, is being built.

Emergency Communication and Quick Seismic Damage Investigation Based on Smartphone

2016 ◽  
Author(s):  
Ruicong Han ◽  
Yan Yu ◽  
Xuefeng Zhao ◽  
Deli Peng ◽  
Quanhua Guan ◽  
...  
Keyword(s):  
Emergency Response ◽  
Seismic Damage ◽  
Field Investigation ◽  
Damage Evaluation ◽  
Emergency Communication ◽  
Emergency Responders ◽  
Rescue Workers ◽  
Exchange Information ◽  
Communication Module ◽  
Damage Investigation

The ability of residents and professional emergency responders to exchange information during an emergency is necessary to provide a more efficient rescue following major disasters. Simultaneously, the quick seismic damage evaluation is significant to provide guidance for emergency response and rescue after disaster. However, traditional field investigation needs immense cost in money, manpower and time to accomplish house-to-house investigation, which results in an inefficient work. Towards this, an emergency communication and quick seismic damage investigation method based on smartphone is proposed and realized with the assistant of an application E-Explorer. First, in emergency communication module, the communication is available by using the multipeer connectivity technology even without external network, which can help to deliver important information for personal survival. Second, in damage investigation module, E-Explorer integrates the functions of questionnaire and picture collection for damage phenomenon recording and image acquisition. Last, a big data sharing platform is built, to provide guidance for rescue workers, and collect damage information for quick intensity evaluation.

The Seismic Damage Investigation and Phenomenon Analysis of Space Grid Structures in Lushan Ms 7.0 Earthquake

2014 ◽  
Vol 501-504 ◽  
pp. 1535-1541 ◽  
Author(s):  
Jue Hui Xing ◽  
Ming Lu ◽  
Hai Wang Li ◽  
Ya Min Zhao ◽  
Yan Yu
Keyword(s):  
Seismic Design ◽  
Shell Structure ◽  
Historical Earthquakes ◽  
Seismic Damage ◽  
Grid Structure ◽  
Paper Briefly ◽  
Space Grid ◽  
Reticulated Shell Structure ◽  
Ball Joints ◽  
Damage Investigation

People remained optimistic about the safety of the space grid structures, because the seismic damages of space grid structures were quite rare and rather light. However, two space grid structures got damaged in 2013 Lushan Ms 7.0 earthquake. The two structures are the double-layer reticulated shell structure and flatbed grid structure, namely Lushan Gymnasium and Lushan Middle School Gymnasium respectively. This paper briefly reviews the seismic damage phenomena of grid structures in historical earthquakes, and then focuses on the two damaged space grid structures in Lushan earthquake. The reason why the two space grid structures got damaged are derived from the force state analysis of the rods, ball joints and bearings. Finally, we come up with the effective advice for the seismic design and construction of the space grid structure.

Seismic Damage Analysis on the Continuous Girder Bridge of Urban Rail Transit Line

2014 ◽  
Vol 488-489 ◽  
pp. 398-402 ◽  
Author(s):  
Hai Qing Li ◽  
Yong Jun Ni ◽  
Xin Gang Liu ◽  
Jin Xing Yan
Keyword(s):  
Seismic Performance ◽  
Evaluation Method ◽  
Research Direction ◽  
Seismic Damage ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Damage Analysis ◽  
Seismic Performance Evaluation ◽  
Damage Indices ◽  
Urban Rail

Seismic damage was the key reason which resulted in the serviceability degradation or collapse of the bridge. How to quantify the seismic damage and evaluate the seismic performance of the bridge under earthquakes through the damage analysis was the significant research direction in the performance based seismic design. In this paper the Park-Ang model (a well-known dual parameters model) and its modification version used for the damage evaluation of the concrete structure were compared. Furthermore, through the definition of the damage indices of the models based on the modified Park-Ang model and the descending slope of the IDA(incremental dynamic analysis) curve, the seismic damage levels of the typical bridge in the urban rail transit line under the designated earthquakes were analyzed, respectively. It was shown from the results that the calculated results from the two model was essentially consistent. The damage analysis based evaluation method was feasibly used for the seismic performance evaluation of the bridge.

Evaluation Method for Seismic Fatigue Damage of Plant Pipeline

2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Fumio Inada ◽  
Michiya Sakai ◽  
Ryo Morita ◽  
Ichiro Tamura ◽  
Shin-ichi Matsuura ◽  
...  
Keyword(s):  
Fatigue Damage ◽  
Nuclear Power ◽  
Power Plants ◽  
Evaluation Method ◽  
Response Spectrum ◽  
Damage Mechanism ◽  
Peak Frequency ◽  
Cumulative Damage ◽  
Cumulative Absolute Velocity ◽  
Seismic Index

Although acceleration and cumulative absolute velocity (CAV) are used as seismic indexes, their relationship with the damage mechanism is not yet understood. In this paper, a simplified evaluation method for seismic fatigue damage, which can be used as a seismic index for screening, is derived from the stress amplitude obtained from CAV for one cycle in accordance with the velocity criterion in ASME Operation and Maintenance of Nuclear Power Plants 2012, and the linear cumulative damage due to fatigue can be obtained from the linear cumulative damage rule. To verify the performance of the method, the vibration response of a cantilever pipe is calculated for four earthquake waves, and the cumulative fatigue damage is evaluated using the rain flow method. The result is in good agreement with the value obtained by the method based on the relative response. When the response spectrum obtained by the evaluation method is considered, the value obtained by the evaluation method has a peak at the peak frequency of the ground motion, and the value decreases with increasing natural frequency above the peak frequency. A higher peak frequency of the base leads to a higher value obtained by the evaluation method.

Design of an Emergency Egress System for Locomotive Cabs

2003 ◽  
Author(s):  
Judith B. Gertler ◽  
James Carter ◽  
Swamidas Punwani
Keyword(s):  
Design Concepts ◽  
Emergency Rescue ◽  
Rescue Workers ◽  
The Past ◽  
Preliminary Examination ◽  
Engineering Costs ◽  
Cost Implications ◽  
The Cost ◽  
Further Development ◽  
Initial List

Improving the survivability of a locomotive crew in the event of an accident has been a concern of the Federal Railroad Administration in the past decade. Locomotive crashes can injure the crew as well as deform the locomotive cab. Exiting from a deformed cab can be difficult, particularly for injured crewmembers. Egress becomes an even greater challenge if the locomotive is toppled. From an initial list of emergency egress concepts, the following three were chosen for further development: 1) hand/footholds to aid climbing inside a toppled locomotive, 2) roof-mounted escape hatch, and 3) externally removable windshield. As the potential users of the egress system, train crews and emergency rescue workers were interviewed to provide feedback on the design concepts. Focus groups with locomotive engineers and conductors provided information about train crew perceptions of the three concepts. Interviews with rescue personnel provided a perspective on the concerns of emergency rescue operations. Based on the user feedback, the roof-mounted escape hatch with hand/footholds was selected as the preferred concept. Construction of a system mockup facilitated evaluation of this concept. The utility of the overall concept was evaluated using untrained personnel in the full-scale mockup of a toppled road locomotive cab. A preliminary examination of the cost implications of incorporating the hatch system into new locomotives indicated that the initial engineering costs, rather than the recurring manufacturing costs, are the issue. As such, the overall cost for implementing the hatch is likely to be low.

Seismic Damage Predictions and Antiseismic Performance Researches of Single-Story Brick Column Workshops in Lushan Ms7.0 Earthquake

2014 ◽  
Vol 638-640 ◽  
pp. 1842-1847
Author(s):  
Ming Zhen Wang ◽  
Bai Tao Sun ◽  
Pei Lei Yan
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Seismic Damage ◽  
Field Investigation ◽  
Damage Prediction ◽  
Affected Area ◽  
Damage Characteristics ◽  
Finite Element Software ◽  
Storage Room

Single-story brick column workshops are widely used as the production or storage room of medium and small-sized enterprises in China. Based on the field investigation of single-story brick column workshops at the earthquake-affected area after Lushan 7.0 earthquake, the damage characteristics of workshops are summed up. Damage prediction analyses are carried out for two typical single-story brick column workshops, and failure mechanism researches are conducted by using ABAQUS finite element software for a workshop. Finally, according to the results of failure mechanism researches, some relevant suggestions of the seismic reinforcement are put forward.

Seismic Damage Investigation of Residential Fill Ground in the Eastern Part of Kyoto Basin

2012 ◽  
Vol 256-259 ◽  
pp. 2200-2206
Author(s):  
Xiao Guang Cai ◽  
Jing Shan Bo ◽  
Ka Mai Toshitaka ◽  
Fa Wu Wang ◽  
Ju Wen Li
Keyword(s):  
Field Survey ◽  
Damage Mechanism ◽  
Seismic Damage ◽  
Geological Condition ◽  
Development History ◽  
Fill Soil ◽  
Kobe Earthquake ◽  
Damage Extent ◽  
Damage Investigation ◽  
Residential Fills

Several earthquakes record that the residential fills always suffer severe damages. In order to know the seismic damage mechanism and evaluate the damage extent of residential fill ground, research is carried out on two fill grounds in the eastern part of Kyoto basin. The research includes field survey about terrain condition, geological condition, development history, disaster condition during 1995 Kobe earthquake and surface wave explorations. Some remarkable conclusions are summarized as follows: In Jyodo-ji area, it is a residential fill on soft alluvium ground. The geological condition is back swamp. The thickness of surface fill soil is about 1~4 meters. In Kiyomizu-dera area, it is a valley filled ground. The geological condition is hilly platform.

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