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Online since: October 2009
Authors: Wei Wang, Bin Wang, Lei Li, Shan Suo Zheng, Jin Chuan He
Component Seismic Damage Model for SRHSHPC Joints Shansuo ZHENGa, Bin WANGb, Lei LIc, Wei WANG d and Jinchuan HEe School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China azhengshansuo@263.net, b wangbin1853@163.com, clilei1004@163.com, dwangweiwei1881@126.com , ejinchuanhe@sohu.com Keywords: reduction factor, capacity of ultimate deformation, the number of cycle, seismic damage model.
The reduction factor is introduced, the dynamic variation relationship of ultimate deformation with the number of cycles is obtained, and the merits of existing damage model are utilized, finally the seismic damage model, which is suitable for SRHSHPC beam-column joints, is established.
One of the best-known local damage model proposed by Park and Ang based on a lot of experimental data of reinforced concrete beams and columns reported in the U.S. and Japan were used in a systematic regression analysis, it can be expressed as m u y u D dE Q δ β δ δ = + ∫ (1) where, mδ is maximum deformation under earthquake; uδ is ultimate deformation under monotonic loading; yQ is calculated yield strength; dE is incremental absorbed hysteretic energy; β is non-negative parameters.
Based on low-cycle accumulation damage proposed by Miner, the reduction factor R is introduced and can be given by ( ) 1 1 C � i f i R �     = −     ∑ (2) where, f� is the number of complete cycles to fatigue, which can be computed through low-cycle damage model developed by Kunnath et al.[3]; � is the number of half-cycle; C is assumed to be 0.5 to represent the rapid increase in the low-cycle accumulation damage as the number of cycles increases.
Online since: August 2015
Authors: Zbigniew L. Kowalewski, Tadeusz Szymczak, Dariusz Rudnik, Adam Brodecki, Andrzej Eminger
Results from tests performed on the composite coated ball joints were compared with data obtained for typical elements.
The producers’ data catalogue [3] indicates that the WC composite is highly resistant to wear, but it strongly depends on a percentage binder content.
Moreover, the following experimental steps were carried out prior to the main test: (a) loading systems were designed and implemented (Fig. 1b); (b) software enabling identification of the effects due to the applied loading conditions was developed; (c) data acquisition system was implemented.
The loading conditions were defined based on the track data.
In this case the weight reduction achieved a higher level close to 0.19 g (W24), Fig. 5.
Online since: May 2011
Authors: Xian Mai Chen, Xia Xin Tao, Gao Hang Cui, Fu Tong Wang
Based on a lot of inspected track irregularity data, the reference [2] proposed a set of general track spectra of Chinese main railway lines (ChinaRLS).
All the time series simulated track vertical profile irregularities are shown in Fig.3 by box and whisker plot, in which the height of every group represents the numerical range of the data, and the “boxes” represent the 25th through the 75th percentile and the horizontal line inside the box is the median value (or the 50th percentile).
According to Fig.5, the sequence of the rates of wheel load reduction of locomotive is the 200km/h of ChinaRLS < the 120km/h of ChinaRLS < the 160km/h of ChinaRLS < the 6th of AmericaRLS.
The sequence of rates of wheel load reduction of vehicle is the 200km/h of ChinaRLS < the 160km/h of ChinaRLS, while the values of the rates of wheel load reduction caused by the 120km/h and the 6th are 1, which are beyond the limits of derailment.
If those abnormal data are excluded, the order of size of the wheel-rail interaction forces of vehicle is similar to locomotive.
Online since: December 2018
Authors: Haoran Wu, Christian Boller, Peter Starke
The availability of reliable fatigue data is of continuous and often urgent need.
Generating S-N-data needs to be performed in a quick and cost-effective way.
The data acquisition software was programmed according to the requirements of the fatigue tests on National Instruments LabVIEW.
As data input for the SteBLifemsb calculation, DT-values are taken at Nf/2 and plotted as sa-DT-curves as shown in Fig. 3b.
The fatigue strength coefficients and exponents of calculated and conventionally determined S-N-data are in the same range (see Fig. 5, upper right).
Online since: August 2012
Authors: Ting An Zhang, Yong Feng Chang, Chuan Lin Fan, Bin Chuan Li, Xiu Jing Zhai
The reduction was performed using carbon as reducing agent.
The reduced calcines with different reduction degree were gained by varying the reduction temperature, reduction time and the amount of reducing agent [11].
Results and Discussion Effect of Reduction Degree of Calcine.
The effect of reduction degree of calcine on the leaching process is shown in Table 2.
The data reported here suggest that using released acid from iron ion hydrolyzing as leaching agent for the reduced calcine is feasible.
Online since: December 2014
Authors: Ming Xiang Wen, Ling Yun Wei, Xiao Guang Zhou
In order to validatesimulation output, all input data are checked manually.
The data, which analyzed bythe MANOVA of SPSS, are presented in Table 4.
The simulation data in condition ofLT=3were chosen for further discussions.
The simulation data in condition of K/H=4were chosen for further discussions.
The simulation data in condition of MCD= 2were chosen for further discussions.
Online since: July 2011
Authors: You Hua Ye, Jian Feng Zou, Wei Ling Liu, Lin Bo Zhang
Based on the soil and plant data that field sampled, five remote sensing data of 1979, 1989, 1995, 2000 and 2003, the effects on ecosystem organic carbon pool from1979 to 2003 caused by land use change in Shenzhen city are analyzed.
Data TM satellite images of 1979,1989,1995,2000 are enhanced and corrected with Erdas imagine software.
According to the distribution of land type, soils and vegetation in Shenzhen City, soil data was sampled in September 2010 using GPS to locate sampling sites, using the method of sampling zone to sample the land use data.
The average carbon density of forest and garden vegetation is calculated with the Volume-biomass method based on forest resource inventory information and data in 2005 in Shenzhen City.
The average carbon density of grasslands, beaches and farmland is calculated based on the actual field sampling and testing data, economic statistics and published literature.
Online since: July 2013
Authors: Yong Chao Liang, Tian Yi Zhu, Xi Jia Zhang
Using ORACLE’s PL/SQL statements to help the data be neat and also with data preprocessing.
Data mining fault feature, as the name suggests is to find characteristics implied from the fault data.
This paper will use history of protection action in data normalization of ORACLE, provide accurate data for data mining.
Fig. 1 SCADA monitoring and collection of statements Implementation Steps SCADA data is saved in hundreds of tables, data is disorder and redundant, but data contains very useful information.
Data is divided into: noise generated test data, maintenance data, the data itself wrong or incomplete records.
Online since: June 2014
Authors: Kunio Hayakawa, Tamotsu Nakamura, Yoshihiro Sagisaka, Itaru Ishibashi, Toshinari Nakakura
Aluminum alloy is a favorable material for weight reduction.
Fig. 3 shows the calibration diagram used in the present paper with some plots of experimental data as examples.
Fig. 3 : Example of calibration diagram and plotted data Experimental setup The experiments were carried out using a 1.5MN servo press AIDA DSF-N2-1600.
Table 3 : Pickup grade with A7075-O Table 4 : Pickup grade with A6061-T6 ( ○: No adhesion, -: No data ) ( ○: No adhesion, -: No data ) Die Punch stroke SP (mm) 13 15.5 17.5 Type I-S ― ― ― Type I-L ○ ○ ○ Type II-L ○ ○ SS Die Punch stroke SP (mm) 13 15.5 17.5 Type I-S ○ S SS Type I-L S ○ SS Type II-L ― ― ― It is well known that a dry-in-place type lubricant film is generally influenced greatly by the surroundings such as temperature and humidity.
Fig. 8 : Change of friction shear factors during three years The effects of preprocess on mD were compared using data obtained in a day for each material.
Online since: May 2012
Authors: Qi Long Miao, Pin Kong, Jian Min Yin
Based on the data of the Nanfeng citrus yield, planting area and freezing injury lost and the minimum air temperature in winter from 1961-2010, the meteorological yield was decomposed.
Data Source Nanfeng citrus total yield, cultivation and disaster situation from 1961 to 2010 come from Nanfeng Agricultural Bureau and Statistic Bureau.
Weather data from 1961 to 2010 comes from meteorological bureau Nanfeng County, Jiangxi Province.
As data shows, since 1961, Nanfeng citrus has encountered 7 dramatic yield reductions in the second year after freezing injury of the last winter.
The method of calculating indemnity amount based on weather data provided by meteorological department greatly reduce cost in determining insured amount.
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