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Performance-based methodology for assessing seismic vulnerability and capacity of buildings

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Earthquake Engineering and Engineering Vibration 2010年第2期9卷 157-165页

作者： Lin Shibin1, Xie Lili1, 2,Gong Maosheng1,2 and Li Ming1,3.1.Institute of Engineering Mechanics,China Earthquake Administration, Harbin 150080, China 2.School of Civil Engineering,Harbin Institute of Technology,Harbin 150090, China 3.School of Civil Engineering,shenyang Jianzhu University,shenyang 11016, China Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China

This paper presents a performance-based methodology for the assessment of seismic vulnerability and capacity of buildings. The vulnerability assessment methodology is based on the HAZUS methodology and the improved capacity- demand-diagram method. The spectral displacement (Sd) of performance points on a capacity curve is used to estimate the damage level of a building. The relationship between Sd and peak ground acceleration (PGA) is established, and then a new vulnerability function is expressed in terms of PGA. Furthermore, the expected value of the seismic capacity index (SCev) is provided to estimate the seismic capacity of buildings based on the probability distribution of damage levels and the corresponding seismic capacity index. The results indicate that the proposed vulnerability methodology is able to assess seismic damage of a large number of building stock directly and quickly following an earthquake. The SCev provides an effective index to measure the seismic capacity of buildings and illustrate the relationship between the seismic capacity of buildings and seismic action. The estimated result is compared with damage surveys of the cities of Dujiangyan and Jiangyou in the M8.0 Wenchuan earthquake, revealing that the methodology is acceptable for seismic risk assessment and decision making. The primary reasons for discrepancies between the estimated results and the damage surveys are discussed.

关键词： performance-based vulnerability building damage seismic capacity software HAZUS

Study on the Corrosion Resistance of Multiphase TRIP Steels

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Journal of Iron and Steel Research International 2011年第S1期18卷 883-887页

作者： WANG Ji-jie 1,WU Di 2,LI Zhuang 1,GUO Xiang-min 1,HE Chun-lin 3.CAI Qing-kui 3.(1.School of Materials Science and Engineering,shenyang University of Aeronautics and Astronautics,shenyang 11013.,Liaoning,China 2.State Key Laboratory of Rolling and Automation,Northeastern University,shenyang 110004,China 3.Liaoning Province Key Laboratory for Advanced Materials,shenyang University,shenyang 110044,Liaoning,China) shenyang Univ Aeronaut & Astronaut Sch Mat Sci & Engn Shenyang 110136 Liaoning Peoples R China Northeastern Univ State Key Lab Rolling & Automat Shenyang 110004 Peoples R China shenyang Univ Liaoning Prov Key Lab Adv Mat Shenyang 110044 Liaoning Peoples R China

Multiphase TRIP (Transformation Induced plasticity) steels are known to combine higher strength with higher *** this paper,the corrosion resistance of this steel has been has been investigated by accelerated corrosion tests,such as wet/dry cyclic corrosion and the weight loss in *** morphologies of their rust layers were observed by using scanning electron microscopy,and the corrosion performance of these steels was discussed by analyzing the protective *** results show that the corrosion rate of steel A is significantly greater than that of steels B and C in wet/dry cyclic corrosion and weight loss *** corrosion performance of conventional C-Mn-Si TRIP steel is deteriorated in both NaHSO 3.and 3.5 wt.% NaCl aqueous *** superior corrosion performance is exhibited for TRIP steel with low alloying contents due to its high thermodynamic *** enhancement of corrosion performance of TRIP steel is attributed to the additions of alloying elements,such as Al,Cu,Cr,Mo,Ni,*** alloying elements increase the compactness of rust layers,so electrochemical characteristic of TRIP steel is improved.

关键词： TRIP steel alloying element rust layer corrosion performance

Combination of drainage, water supply and environmental protection as well as rational distribution of water resource in Zhengzhou mining district

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Science China Earth Sciences 2005年第10期48卷 1768-1779页

作者： WU Qiang1, LI Duo1,2, DI Zhiqiang3. MIAO Ying3. ZHAO Suqi4 & GUO Qiwen5 1. Resource Exploitation Engineering College, CUMT, Beijing 100083. China 2. Shijiazhuang Engineering College, University of Economics, Shijiazhuang 05003., China 3. shenyang Institute of Geology and Mineral Resources, shenyang 11003., China 4. State Adminstration of Coal Mine Safety, Beijing 100013. China 5. Zhengzhou Coal Mine Company (Group), Zhengzhou 4523.1, China Resource Exploitation Engineering College CUMT Beijing China Shijiazhuang Engineering College University of Economics Shijiazhuang China shenyang Institute of Geology and Mineral Resources shenyang China State Adminstration of Coal Mine Safety Beijing China Zhengzhou Coal Mine Company (Group) Zhengzhou China

The geological condition of coalfield is much complex in China. With increasing in mining depth and drainage amount, the contradiction of drainage, water supply and environ-mental protection is becoming more and more serious. However, the contradiction can be solved by the scientific management of optimizing combination of drainage, water supply and environ-mental protection. The Philip multiple objectives simplex method used in this article has searched for a possible solution at the first step, and then it goes on searching to find out whether there is a weight number that can lead the solution to the biggest. It can reduce the randomness and diffi-culty of traditional weight method which determine the weight number artificially. Some beneficial coefficients are vague and the number is larger in the model of water resource dispatch. So the vague layer analysis method can consider these vague factors fully, combining the qualitative and quantitative analysis together. Especially, this method can quantify the experiential judge-ment of policy decider, and it will turn to be more suitable if the structure of objective factors is complex or the necessary data are absent. In the paper, the two methods above are used to solve the plans of drainage, water supply and optimizing distribution of water resource in the Zhengzhou mining district.

关键词： combination of drainage, water supply and environmental protection, Philip multiple objective simplex method, vague layer analysis method, distribution of water resource.

Geochemistry of high-Mg andesites from the early Cretaceous Yixian Formation, western Liaoning: Implications for lower crustal delamination and Sr/Y variations

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Science China Earth Sciences 2006年第9期49卷 904-914页

作者： WANG Xiaorui1, GAO Shan1,2, LIU Xiaoming1, YUAN Honglin1, HU Zhaochu1, ZHANG Hong1,3.& WANG Xuance4 1. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi`an 710069, China 2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 43.074, China 3. shenyang Institute of Geology and Mineral Resources, shenyang 11003., China 4. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China 1. State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi’an 710069 China 2. State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan 430074 China 3. shenyang Institute of Geology and Mineral Resources Shenyang 110032 China 4. Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

85 volcanic rocks of the Yixian Formation from the Sihetun type section werecollected and analyzed for geochemical and isotopic compositions. Major element compositionsindicate that the Sihetun volcanic rocks are high magnesium andesites with some basalts occurring atthe bottom of section. The Sihetun high magnesium andesites (SiO_2 = 52.82-59.3. wt%, Al_2O_3.14.15-16.3.wt%) show many characteristics of adakites such as depletion in heavy rare-earth elements(HREE; Yb = 1.03.1.88 μg/g) and Y(12-20 μg/g) and high Sr (620-13.3.μg/g) and Sr/Y(3.-88), withhigh La_N/Yb_N ratio (10-25). They share similar major and trace element characteristics to volcanicrocks from the Xinglonggou Formation except their lower Nd isotope ratios (^(143.Nd/^(144)Nd(13.Ma) = 0.5118-0.5119, ε_(Nd) (13.Ma) = -11.6-13.8, ^(87)Sr/^(86)Sr (13. Ma) = *** were interpreted in a way that eclogite that formed at the base of thickened Archean lowercrust of the North China craton foundered into the convecting mantle and subsequently melted andinteracted with peridotite. However, compared to the Xinglonggou volcanic rocks, the source of theSihetun magma contained more ancient continental crustal material in order to explain its evolved Ndisotopes. The age of the Sihetun Formation was 120 to 13. Ma, and this indicates that delaminationlasted to the early Cretaceous period. The Sr contents and Sr/Y ratios of the Sihetun high-Mgandesites show significant negative correlations with SiO_2 for samples with SiO_2 > 56%. Thesesuggest that the Sr and Sr/Y values were reduced due to fractional crystallization of ***, the effect of crystallization on volcanic Sr and Sr/Y ratio has to be taken intoaccount.

关键词： High-Mg andesite, Adakite, Yixian Formation, North China Craton, delamination.

Clinical manifestation, imageological and pathological characteristics of Wernicke encephalopathy

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Neural Regeneration Research 2006年第8期1卷 697-701页

作者： Shunchang Han 1,2, Chuanqiang Pu2, Qiuping Gui3. Xusheng Huang2, Senyang Lang2, Weiping Wu2, Peifu Wang2 1Department of Neurology, Second Hospital Affiliated to China Medical University, shenyang 110003. Liaoning Province, China 2Department of Neurology, 3.epartment of Pathology, General Hospital of Chinese pla, Beijing 100853. China Department of Neurology China Medical University Shenyang 110003 Liaoning Province China Department of Neurology General Hospital of Chinese PLA Beijing 100853 China Department of Pathology General Hospital of Chinese PLA Beijing 100853 China

BACKGROUND: The clinical manifestations of Wernicke encephalopathy(WE) are atypical and short of effective auxiliary examination means. The effects of magnetic resonance imaging (MRI) in the diagnosis of WE have been reported successively. But its imageological detection needs to be further investigated. OBJECTIVE: To analyze the characteristics of clinical manifestations, skull MRI examination and pathological results in patients with WE. DESIGN: Retrospective analysis. SETTING: The General Hospital of Chinese pla. PARTICIPANTS: Ten patients of WE admitted to the Department of Neurology, General Hospital of Chinese pla were recruited. Among them, five patients were diagnosed pathologically after death. Their pathological changes accorded with the pathological characteristics of WE. The other 5 patients were diagnosed clinically before death. Their pathological changes accorded with clinical and imageological manifestations and had definite reaction to the treatment of thiamine. Ten patients, 7 males and 3.females, were aged (47±13. years ranging from 3. to 73.years. Their disease courses averaged 6 weeks ranging from 3.to 10 weeks. They all were non-alcoholics. Four patients developed WE after acute pancreatitis, two patients after the recurrence of gastric cancer, two patients after cholecystectomy, one patient after hepatitis medicamentosa, one patient after Alzheimer disease. Informed consents were obtained from all the patients and their relatives. METHODS: After admission, clinical manifestations of patients were observed and recorded. Five patients underwent skull MRI examination and their detected results were recorded. Five dead patients underwent autopsy and brain pathological examinations. Neuropathological examination involved cerebrum, cerebellum and brain stem. MAIN OUTCOME MEASURES: Clinical manifestations, MRI examination results, pathological analysis results and prognosis of all the patients. RESULTS: Ten patients with WE were involved in the final

关键词： Clinical manifestation imageological and pathological characteristics of Wernicke encephalopathy

Static mechanics analysis of no bumping or vibration welding structure applied in high-speed & heavy-load CWR with single inclined surface

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Science China(Technological Sciences) 2010年第12期53卷 3153-3160页

作者： SONG YuQuan1, LUO WuWei2 & TAO Yi2 1 Jilin University, Changchun 13.022, China 2 shenyang Railway Bureau, shenyang 110013. China 1. Jilin University Changchun 130022 China2. Shenyang Railway Bureau Shenyang 110013 China

Nowadays, the sleeper, railroad bed, welding technology and materials of the high-speed & heavy-load Continuous Welded Rail (CWR) have been improved greatly. However, the orientation relationship between welding surface and rail is still orientation structure, which appeared 185 years ago in UK, namely, the welding surface is normal to the longitudinal direction of the rail. Thus rail welds are subject to vertical pure shear stress, lateral pure shear stress and axial pure tensile stress. Pure shear stress and pure tensile stress are both dangerous stresses, which result in failure of welds under high-speed & heavy-load condition for a long time. When the wheels pass rail welds, it is difficult to avoid vertical bumping and lateral vibration. In order to solve these problems, in this paper we put forward the single inclined welding surface having dip angle α with the lateral rail or dip angle β with the vertical rail and analyze the position geometry and stress state. Thus the vertical bumping and lateral vibration are basically eliminated, then the bearing capacity of the welding surface is significantly improved, and the stress of axial pure tensile and lateral pure shear of the welding surface is reduced.

关键词： continuous welded rail single inclined welding surface bearing capacity stress state regularity

Discharge Characteristics of Bubbles at Interface Between AIN Ceramic and FC-72 Liquid

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 371-380页

作者： shenyang Mo Xuebao Li Zhibin Zhao Xiang Cui State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China

In order to evaluate the insulation of two-phase immersion cooling in the HV power electronic package,the insulation degradation of the dielectric interface induced by bubbles is *** this paper,a test strategy with 50 Hz unipolar DC and AC combined voltage for partial discharge(PD)at boiling interface of AlN ceramic is *** insulation threshold of an AlN ceramic surface is acquired in several dielectric environments,such as air,FC-72 liquid(FC-72,a Fluorinert^(TM) from 3.(TM)),FC-72 vapor,and boiling state of *** reveals the deterioration of boiling on the insulation of the surface immersed in the dielectric *** investigate the mechanism of the PD feature at the boiling interface,the PD patterns of the unrestricted bubble and the accumulated bubble are acquired and contrastively *** with the feature of the back discharge and the bubble behavior,the charged vapor-ceramic interface is relatively stable due to the accumulated vapor *** stability of the charged vaporceramic interface is broken if the bubble is ***,it is discovered that the vapor-liquid interface inside the bubble may be another charged interface,which can also trigger a back discharge.

关键词： Biased AC voltage bubble FC-72 partial discharge power electronic package surface discharge twophase cooling

The Antifreeze Critical Strength of Low-temperature Concrete Effected by Index

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Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 355-360页

作者：刘军 School of Material Science and Engineering Shenyang Jianzhu University

The antifreeze critical strength and the pre-curing time of low-temperature concrete were studied by means of guaranteed rate of compressive strength and antifreeze performance for the structural safety requirement of concrete engineering,suffering once freeze damage under air *** is shown that the antifreeze critical strength is 3.7-4.4MPa,pre-curing time is 18-3. h by guaranteed rate of compressive strength,and the antifreeze critical strength is 3.7-4.4MPa,pre-curing time is 18-3. h by guaranteed rate of antifreeze *** can be found that the method of guaranteed rate of compressive strength is sensitive to the defect which generated by freeze damage in the concrete *** method is fit to evaluate the antifreeze critical strength of low-temperature concrete.

关键词： guaranteed rate of compressive strength guaranteed rate of antifreeze performance antifreeze critical strength once freeze under air environment

2.5-dimensional angle potential field algorithm for the real-time autonomous navigation of outdoor mobile robots

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Science China(Information Sciences) 2011年第10期54卷 2100-2112页

作者： QIU Quan 1,3.& HAN JianDa 2 1 Beijing Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China 2 State Key Laboratory of Robotics,shenyang Institute of Automation,Chinese Academy of Sciences,shenyang 110016,China 3.National Research Center for Intelligent Agricultural Equipment,Beijing 100097,China 1. Beijing Research Center of Intelligent Equipment for Agriculture Beijing 100097 China3. National Research Center for Intelligent Agricultural Equipment Beijing 100097 China2. State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China

A new real-time algorithm for the autonomous navigation of mobile robots equipped with laser scanners is proposed in this *** from the existing algorithms designed for 2-dimensional navigation problems,the new algorithm introduces the height information of the obstacles into the guidance process and behaves as a 2.5-dimensional angle potential field algorithm (2.5D-APF) to fulfill the navigation requirements under complex outdoor terrain ***,one laser scan is partitioned into two kinds of function sectors: guidance sector and inspecting ***,the guidance sector and the inspecting sectors are reconstructed to form a virtual guidance scan,where the 2.5D information is taken into ***,the conventional APF is improved to analyze the virtual guidance scan and generate the navigation *** new algorithm is tested on a tracked mobile robot,and the experimental results validate the proposed algorithm.

关键词： robot 2.5-dimensional outdoor real-time autonomous navigation