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Analysis on cracking of deck pavement on Jiangyin Bridge 被引量:5
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作者 程刚 陈先华 王晓 《Journal of Southeast University(English Edition)》 EI CAS 2005年第4期490-494,共5页
Based on four-year field inspection and investigation on deck pavement of mastic asphalt on Jiangyin Bridge, cracking causes of mastic asphalt are studied. Cracks of deck pavement are summarized on crack length and wi... Based on four-year field inspection and investigation on deck pavement of mastic asphalt on Jiangyin Bridge, cracking causes of mastic asphalt are studied. Cracks of deck pavement are summarized on crack length and width to get a clear view of their propagations. Traffic surveys including traffic volume, axle load and vehicle speed were also conducted to assess their influences. Samples taken on-site were tested with pulling-out test and fatigue test to benchmark their properties. According to the inspection and tests results, it is concluded that the cracks are induced by rutting and fatigue. Lack of fatigue resistance, not well bonded to the steel deck and insufficient high temperature stability are supposed to be the main reasons as well as high density of low speed, excessively overloaded trucks. 展开更多
关键词 suspension steel bridge Jiangyin Bridge orthotropic deck plate deck pavement mastic asphalt CRACKING
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Finite element simulation and optimal analysis of surfacing on steel orthotropic bridge deck 被引量:2
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作者 谭积青 徐伟 张肖宁 《Journal of Southeast University(English Edition)》 EI CAS 2006年第4期539-543,共5页
To analyze the stress state of steel orthotropic deck pavement and provide reference for the design of the overlay, the inner stress state and strain distribution of surfacing under the load of the deformation of the ... To analyze the stress state of steel orthotropic deck pavement and provide reference for the design of the overlay, the inner stress state and strain distribution of surfacing under the load of the deformation of the whole bridge structure and tyre load are analyzed by the finite element method of submodeling. Influence of surfacing modulus on the strain state of the overlay is analyzed for the purpose of the optimal design of the overlay structure. Analysis results show that the deformation of the whole bridge structure has no evident influence on the stress state of the overlay. The key factor of the overlay design is the transverse tensile strain in the overlay above the upper edge of web plate of rib. The stress state of the overlay is influenced evidently by the modulus of rigidity transform overlay. And the stress state of the overlay can be optimized and lowered by increasing the modulus and thickness of rigidity transform overlay, The fatigue test has been done to evaluate the fatigue performance and modulus of different deck pavement materials such as epoxy asphalt, SBS modified asphalt, rosphalt asphalt which can provide reference for deck pavement structure design. 展开更多
关键词 steel orthotropic deck bridge deck overlay finite element submodeling optimal analysis fatigue test
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A systematic review of steel bridge deck pavement in China
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作者 Leilei Chen Xinyuan Zhao +1 位作者 Zhendong Qian Jiaqi Li 《Journal of Road Engineering》 2023年第1期1-15,共15页
As an important part of steel bridge deck,the engineering quality and service condition of steel bridge deck pavement(SBDP)directly affects the capacity and operational efficiency of the bridge.This paper reviews the ... As an important part of steel bridge deck,the engineering quality and service condition of steel bridge deck pavement(SBDP)directly affects the capacity and operational efficiency of the bridge.This paper reviews the history of the development of SBDP in China over the past 20 years from the exploration stage,rapid development stage and prosperity stage.The development and application of SBDP at different stages are discussed in terms of materials,structure,design,performance evaluation,maintenance and rehabilitation,respectively.The advantages and disadvantages of different pavement materials and structures,and the application of different research methods are summarized.The review shows that the improvement of pavement materials and structures and the development of new materials should be further studied on the multi-scale to enhance the durability of pavement materials,so as to extend the service life of pavements.The design method of SBDP related to the synergistic effect of vehicle,pavement and bridge should be established,and the design concept and method standard of rigid base pavement structure should be improved and formulate a complete design standard.In addition,multi-disease intelligent identification system and equipment should be studied to track the entire course of disease development in real time.And it is necessary to develop appropriate algorithms to select and classify the complex data of disease and maintenance history. 展开更多
关键词 Steel bridge deck pavement Pavement material and structure Pavement design Service performance Maintenance and rehabilitation
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Interfacial behaviors of epoxy asphalt surfacing on steel decks 被引量:6
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作者 陈先华 黄卫 钱振东 《Journal of Southeast University(English Edition)》 EI CAS 2007年第4期594-598,共5页
A model for predicting the interface behavior of epoxy asphalt and steel composite beam under negative bending is developed incorporating partial interaction theory. Interfacial slips between the steel deck and the ep... A model for predicting the interface behavior of epoxy asphalt and steel composite beam under negative bending is developed incorporating partial interaction theory. Interfacial slips between the steel deck and the epoxy asphalt surfacing are included in the model with a new parameter of membrane stiffness. A series of analytical equations based on this model are derived to calculate slip and strain at the interface. Also, a numerical procedure for calculating the load responses of simply supported composite beams with concentrated force at the mid-span is established and verified with two samples. Characters of slip and strain at the interface, sensitivities of tensile stress and interface shear stress with material parameters are studied. It can be concluded that interfacial effects decrease the bending stiffness of the composite; hard and stiff bonding material is better for asphalt surfacing layer working at normal to low temperatures, and the damage of the asphalt surfacing layer will be accelerated with the damage accumulation of the bonding coat. 展开更多
关键词 epoxy asphalt surfacing steel bridge deck interfacial behavior composite beam
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Dynamic analysis of pavement on long span steel bridge decks 被引量:7
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作者 刘云 钱振东 《Journal of Southeast University(English Edition)》 EI CAS 2008年第2期212-215,共4页
In order to analyze the dynamic response of pavement on long-span steel bridge decks under random dynamic loads, the irregularities of the pavement surface is simulated with the power spectrum density function, and th... In order to analyze the dynamic response of pavement on long-span steel bridge decks under random dynamic loads, the irregularities of the pavement surface is simulated with the power spectrum density function, and the random load is calculated according to a vehicle vibration equation of vehicle model. The mechanical responses of three different cases are compared by using a transient dynamic analysis method, i. e., under random dynamic load, constant moving load and dead load respectively. The results indicate that the mid-span of two adjacent transversal diaphragms is the worst load position. The maximum vertical displacement and the maximum transversal tensile stress of the pavement are 1.33 times and 1.39 times as much as those when only considering the impact coefficients. This study not only provides a theoretical basis for the mixture design and structural design of pavement, but also puts forward higher demand on the construction and maintenance for steel deck pavement. 展开更多
关键词 steel deck pavement finite element method dynamic analysis impact coefficient
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Study on low temperature performance of Gussasphalt on steel decks with hard bitumen 被引量:6
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作者 杨军 《Journal of Southeast University(English Edition)》 EI CAS 2003年第2期160-164,共5页
Using a Hamburg wheel-track test device, the resistance to rutting of Gussasphalt is tested and compared. Gussasphalt with hard bitumen has good resistance to rutting. The related resistance abilities to cracking at ... Using a Hamburg wheel-track test device, the resistance to rutting of Gussasphalt is tested and compared. Gussasphalt with hard bitumen has good resistance to rutting. The related resistance abilities to cracking at low temperature of Gussasphalt are tested and compared through flexural experiments and the composite structure fatigue test with temperature dropping. Gussasphalt with high performance polymer modified bitumen has a longer fatigue life and a lower breaking temperature; they can be used in the future surfaces for steel bridge decks in Germany. 展开更多
关键词 GUSSASPHALT surfaces for steel decks hard bitumen high performance polymer modified bitumen low temperature performance
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基于XMCDA标准的DEXi模型在Decision Deck平台上的应用与实现 被引量:2
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作者 李晓斌 Bohanec Marko 《自动化与仪器仪表》 2015年第2期128-130,共3页
DEXi是一个面向教育的,组合约束条件的决策支持计算机软件,其目的在于交互设计定性的,组合约束条件和分层次的决策支持模型,以及对备选方案的评估。XMCDA是一个新出现的数据标准,它根据清晰定义的语法,支持用XML来呈现组合约束条件决策... DEXi是一个面向教育的,组合约束条件的决策支持计算机软件,其目的在于交互设计定性的,组合约束条件和分层次的决策支持模型,以及对备选方案的评估。XMCDA是一个新出现的数据标准,它根据清晰定义的语法,支持用XML来呈现组合约束条件决策支持的数据元素。在这篇文章中,我们调查了一些方法,并且提出了一些将定性的DEXi决策支持模型转化为XMCDA标准的解决方案。这项工作的动机在于实现DEXi模型在Decision Deck这个使用组合约束条件决策支持的标准来协作开发开源软件的平台上的应用。 展开更多
关键词 决策支持模型 MCDA DEXi软件 Decision deck平台 XMCDA标准 Diviz软件
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双层异质环氧沥青复合型桥面铺装SEC-DECK
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作者 陈先华 厉学武 《城市道桥与防洪》 2014年第9期66-68,15,共3页
SEC-DECK为东南大学提出的双层异质复合铺装结构,其铺装上层为沥青玛蹄脂碎石混合料,铺装下层为环氧沥青混合料,在国内二十多个钢桥中得到成功应用。系统介绍SEC-DECK的铺装结构组成、性能、设计建造关键技术及其在国内的应用状况,供国... SEC-DECK为东南大学提出的双层异质复合铺装结构,其铺装上层为沥青玛蹄脂碎石混合料,铺装下层为环氧沥青混合料,在国内二十多个钢桥中得到成功应用。系统介绍SEC-DECK的铺装结构组成、性能、设计建造关键技术及其在国内的应用状况,供国内同行桥面铺装设计参考。 展开更多
关键词 钢桥面铺装 双层异质复合铺装 环氧沥青 SEC-deck
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Design and laboratory evaluation of fog-sealed chip seal on epoxy asphalt pavement for steel bridge deck 被引量:4
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作者 郑冬 钱振东 +1 位作者 王睿 刘阳 《Journal of Southeast University(English Edition)》 EI CAS 2017年第1期101-105,共5页
In order to improve the surface performace of epoxy asphalt pavement (EAP) for steel bridge deck, an epoxy asphalt chip seal ( ECS) covered by a cationic emulsified asphalt fog seal (i. e., fog-sealed chip seal)... In order to improve the surface performace of epoxy asphalt pavement (EAP) for steel bridge deck, an epoxy asphalt chip seal ( ECS) covered by a cationic emulsified asphalt fog seal (i. e., fog-sealed chip seal) isproposed and a laboratory study is conducted to design and evaluate te fog-sealed chip seal. First, the evaluation indices and methods of te chip seal on steel bridge deck pavement were proposed. Secondly, the worst pavement conditions during te maintenance time were simulated by te small traffic load simulation system MMLS3 and the short-term aging test for minimizing the failure probability of chip seal. Finally, the design parameters of fog-sealed chip seal were determined by the experimental analysis and the performance of the designed fog-sealed chip seal was evaluated in thelaboratory. Results indicate that the proposed simulation method of pavement conditions is effective and the maximal load repetitions on the EAPslab specimen are approximately 925 300 times. Moreover, the designed fog-sealedchip sealcan provide a dense surface with sufficient skid resistance,aggregate-asphalt aahesive performance and interlayer shearing resistance. 展开更多
关键词 pavement maintenance composite seal epoxy asphalt laboratory evaluation pavement condition simulation steel bridge deck pavement
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Penetration of the Stiffener Web to Deck Plate Weld in Orthotropic Plated Bridge Decks
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作者 Hans De Backer Amelie Outtier Philippe Van Bogaert 《Journal of Civil Engineering and Architecture》 2013年第3期261-272,共12页
This paper reports the results of experimental research the longitudinal stiffeners in an orthotropic plated bridge deck on concerning the connection between the deck plate and the web of a microscopic scale. An impor... This paper reports the results of experimental research the longitudinal stiffeners in an orthotropic plated bridge deck on concerning the connection between the deck plate and the web of a microscopic scale. An important number of test specimens of a weld are studied with the help of a video microscope, to detect the efficiency of the root of the weld. The second part of the paper is concerned with parametric analysis of the lack of weld penetration by using accurate finite element modelling. The results demonstrate that the weld quality often required can not always be assured, which surely has important consequence on the stresses in the weld and the fatigue resistance. 展开更多
关键词 Weld penetration orthotropic plated bridge deck stiffener web to deck plate weld.
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Crack stop holes in steel bridge decks:Drilling method and effects 被引量:19
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作者 FU Zhong-qiu JI Bo-hai +1 位作者 XIE Shu-hui LIU Tian-jia 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第10期2372-2381,共10页
Force analysis using a compact tension model, as recommended by ASTM, was carried out on a crack stop hole. The stress before, and after, drilling the hole was compared in terms of stress concentration and stress grad... Force analysis using a compact tension model, as recommended by ASTM, was carried out on a crack stop hole. The stress before, and after, drilling the hole was compared in terms of stress concentration and stress gradient. The optimum drilling location and diameter were studied through analysis of different locations and diameters. By analyzing the effects of flank holes and an additional hole, drilling advice was proposed and fatigue testing of the cracks in a steel bridge deck with a crack stop hole was conducted. The results show that the stress at the crack tip with a crack stop hole decreased, and the major principal stress around the hole was distributed accordingly. The optimum position of the crack stop hole centre was where the centre of the crack stop hole was situated behind the crack and the hole edge coincided with the crack tip. Therefore, hole diameters larger than 8 mm, or those weakening the section by 10%, were suggested as the best diameters. In terms of multi-hole crack stopping, a flank hole was not recommended. The optimum horizontal position of flank holes was at a distance of 1/4 of a single hole diameter from, and in front of, the single hole. Besides, the experiment showed that crack stop hole could only prevent cracks from growing and had no influence on crack growth rate. 展开更多
关键词 steel bridge deck fatigue CRACK STOP HOLE DRILLING method HOLE position
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配比设计中缺失数据的hot-deck估算 被引量:5
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作者 任金马 赵杨 +1 位作者 陈峰 蓝绍颖 《中国卫生统计》 CSCD 北大核心 2004年第5期303-306,共4页
目的 探讨hot deck估算在含有缺失数据的配比设计资料分析中的应用。方法 在Stata7 0软件上利用AdrianMander和DavidClayton开发的hot deck程序进行数据模拟。 结果 hot deck估算可以使缺失数据所包含的信息得到一定程度的弥补 ,当... 目的 探讨hot deck估算在含有缺失数据的配比设计资料分析中的应用。方法 在Stata7 0软件上利用AdrianMander和DavidClayton开发的hot deck程序进行数据模拟。 结果 hot deck估算可以使缺失数据所包含的信息得到一定程度的弥补 ,当含有缺失值的变量是分类或等级变量时 ,效果更为显著。结论 hot deck估算是解决配比设计资料中离散型数据缺失问题的一个有效工具。 展开更多
关键词 缺失数据 资料分析 数据缺失 估算 效果 程度 问题 结论 离散型 信息
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Double deck bridge behavior and failure mechanism under seismic motions using nonlinear analyzes 被引量:7
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作者 Shirin Alali Li Jianzhong Guo Guanzhong 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2013年第3期447-461,共15页
This paper investigates the behavior and the failure mechanism of a double deck bridge constructed in China through nonlinear time history analysis. A parametric study was conducted to evaluate the influence of differ... This paper investigates the behavior and the failure mechanism of a double deck bridge constructed in China through nonlinear time history analysis. A parametric study was conducted to evaluate the influence of different structural characteristics on the behavior of the double deck bridge under transverse seismic motions, and to detect the effect of bi- directional loading on the seismic response of this type of bridge. The results showed that some characteristics, such as the variable lateral stiffness, the foundation modelling, and the longitudinal reinforcement ratio of the upper and lower columns of the bridge pier bents have a major impact on the double deck bridge response and its failure mechanism under transverse seismic motions. It was found that the soft story failure mechanism :is not unique to the double deck bridge and its occurrence is related to some conditions and structural characteristics of the bridge structure. The analysis also showed that the seismic vulnerability of the double deck bridge under bi-directional loading: was severely increased compared to the bridge response under unidirectional transverse loading, and out-of-phase movements were triggered between adjacent girders. 展开更多
关键词 double deck bridge seismic response nonlinear time history analysis soft story mechanism bidirectional motion
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Real-Time Detection of Cracks on Concrete Bridge Decks Using Deep Learning in the Frequency Domain 被引量:10
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作者 Qianyun Zhang Kaveh Barri +1 位作者 Saeed K.Babanajad Amir H.Alavi 《Engineering》 SCIE EI 2021年第12期1786-1796,共11页
This paper presents a vision-based crack detection approach for concrete bridge decks using an integrated one-dimensional convolutional neural network(1D-CNN)and long short-term memory(LSTM)method in the image frequen... This paper presents a vision-based crack detection approach for concrete bridge decks using an integrated one-dimensional convolutional neural network(1D-CNN)and long short-term memory(LSTM)method in the image frequency domain.The so-called 1D-CNN-LSTM algorithm is trained using thousands of images of cracked and non-cracked concrete bridge decks.In order to improve the training efficiency,images are first transformed into the frequency domain during a preprocessing phase.The algorithm is then calibrated using the flattened frequency data.LSTM is used to improve the performance of the developed network for long sequence data.The accuracy of the developed model is 99.05%,98.9%,and 99.25%,respectively,for training,validation,and testing data.An implementation framework is further developed for future application of the trained model for large-scale images.The proposed 1D-CNN-LSTM method exhibits superior performance in comparison with existing deep learning methods in terms of accuracy and computation time.The fast implementation of the 1D-CNN-LSTM algorithm makes it a promising tool for real-time crack detection. 展开更多
关键词 Crack detection Concrete bridge deck Deep learning REAL-TIME
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Evaluation of pneumatic inclined deck separator for high-ash Indian coals 被引量:6
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作者 Nikhil Gupta 《International Journal of Coal Science & Technology》 EI 2016年第2期198-205,共8页
Application of pneumatic separators in coal beneficiation is increasing rapidly over the last decade primarily due to their low capital and operating costs, and waste handling problems associated with traditional wet ... Application of pneumatic separators in coal beneficiation is increasing rapidly over the last decade primarily due to their low capital and operating costs, and waste handling problems associated with traditional wet processing methods. Large amount of shale/rock that is extracted in coal production can be removed prior to transportation at the mine face by using this methodology. Due to the limited washing facilities in India, most of the thermal power plants burn raw coal from run-of-mine (ROM) to generate electricity. This practice causes poor utilization efficiency, high operating and maintenance costs, and high emission rates for the power plants. One potential method that can be utilized is the air-fluidized inclined vibrating deck technology. The technology was demonstrated on a pilot-scale at different coal washeries in India at a feed rate of 5-ton per hour. The pilot-scale evaluation showed that 20 %-25 % high-ash incombustible material can be eliminated from ROM feed with only minor losses in energy content (〈10 %) from respective ROM coal. Furthermore, a feasibility analysis showed significant economic gains in terms of transportation cost, improving power-plant efficiency, and reducing emissions rates by using the technology. 展开更多
关键词 Coal deshaling Pneumatic separation Inclined deck Vibrating table FLUIDIZATION
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Numerical investigation of temperature gradient-induced thermal stress for steel–concrete composite bridge deck in suspension bridges 被引量:5
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作者 WANG Da DENG Yang +1 位作者 LIU Yong-ming LIU Yang 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第1期185-195,共11页
A3D finite element model(FEM)with realistic field measurements of temperature distributions is proposed to investigate the thermal stress variation in the steel–concrete composite bridge deck system.First,a brief lit... A3D finite element model(FEM)with realistic field measurements of temperature distributions is proposed to investigate the thermal stress variation in the steel–concrete composite bridge deck system.First,a brief literaturereview indicates that traditional thermal stress calculation in suspension bridges is based on the2D plane structure with simplified temperature profiles on bridges.Thus,a3D FEM is proposed for accurate stress analysis.The focus is on the incorporation of full field arbitrary temperature profile for the stress analysis.Following this,the effect of realistic temperature distribution on the structure is investigated in detail and an example using field measurements of Aizhai Bridge is integrated with the proposed3D FEM model.Parametric studies are used to illustrate the effect of different parameters on the thermal stress distribution in the bridge structure.Next,the discussion and comparison of the proposed methodology and simplified calculation method in the standard is given.The calculation difference and their potential impact on the structure are shown in detail.Finally,some conclusions and recommendations for future bridge analysis and design are given based on the proposed study. 展开更多
关键词 suspension bridge steel–concrete composite bridge deck vertical temperature gradient finite element method thermal stress
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A Simplified Nonlinear Model of Vertical Vortex-Induced Force on Box Decks for Predicting Stable Amplitudes of Vortex-Induced Vibrations 被引量:7
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作者 Le-Dong Zhu Xiao-Liang Meng +1 位作者 Lin-Qing Du Ming-Chang Ding 《Engineering》 SCIE EI 2017年第6期854-862,共9页
Wind-tunnel tests of a large-scale sectional model with synchronous measurements of force and vibration responses were carried out to investigate the nonlinear behaviors of vertical vortex-induced forces (VIFs) on t... Wind-tunnel tests of a large-scale sectional model with synchronous measurements of force and vibration responses were carried out to investigate the nonlinear behaviors of vertical vortex-induced forces (VIFs) on three typical box decks (i.e., fully closed box, centrally slotted box, and semi-closed box). The mechanisms of the onset, development, and self-limiting phenomenon of the vertical vortex-induced vibration (VlV) were also explored by analyzing the energy evolution of different vertical VIF components and their contributions to the vertical VIV responses. The results show that the nonlinear components of the vertical VIF often differ from deck to deck; the most important components of the vertical VIF, governing the stable amplitudes of the vertical VIV responses, are the linear and cubic components of velocity contained in the self-excited aerodynamic damping forces. The former provides a constant negative damping ratio to the vibration system and is thus the essential power driving the development of the VIV amplitude, while the latter provides a positive damping ratio proportional to the square of the vibration velocity and is actually the inherent factor making the VIV amplitude self-limiting. On these bases, a universal simplified nonlinear mathematical model of the vertical VIF on box decks of bridges is presented and verified in this paper; it can be used to predict the stable amplitudes of the vertical VIV of long-span bridges with satisfactory accuracy. 展开更多
关键词 Box deck of bridge Vertical vortex-induced vibration Vertical vortex-induced force Simplified nonlinear model Wind-tunnel test Large-scale sectional model Synchronous measurement of force and vibration
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Research on the Evaluation System of Epoxy Asphalt Steel Deck Pavement Distress Condition 被引量:2
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作者 Hui Zhang Yingtao Li +1 位作者 Xinxin Fu Youqiang Pan 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2019年第5期41-50,共10页
Epoxy asphalt concrete has been one of the mainstream technology of steel deck pavement in China. But little specification about evaluation system for its distress condition has been researched and maintenance was sti... Epoxy asphalt concrete has been one of the mainstream technology of steel deck pavement in China. But little specification about evaluation system for its distress condition has been researched and maintenance was still unsystematic. The section weight coefficient of different distress is proposed by analyzing the applicability of the “Highway Performance Assessment Standards”. Indexes mainly including SDPCI PDR and PCR are presented to evaluate its distress condition. The evaluation system and maintenance plan decision tree were recommended which can assist scientific maintenance of epoxy asphalt steel deck pavement. 展开更多
关键词 steel deck PAVEMENT EPOXY ASPHALT concrete DISTRESS condition evaluation system maintenance PLAN
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Effects of Deck Motion and Ship Airwake on Ski-Jump Takeoff Performance of Carrier-Based Aircraft 被引量:2
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作者 Li Kangwei Zhen Ziyang Sun Yili 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2016年第4期510-518,共9页
We first analyzed the force and motion of naval aircraft during launching process.Further,we investigated the ship deck with the form of a ramp and established deck motion model and ship airwake model.Finally,we condu... We first analyzed the force and motion of naval aircraft during launching process.Further,we investigated the ship deck with the form of a ramp and established deck motion model and ship airwake model.Finally,we conducted simulations at medium sea.Results showed that the effects of deck motion on takeoff varied with initial phases,and airwake could help reducing aircraft′s sinkage.We also found that the deck motion played a major role in the effects caused by the interaction of deck motion and ship airwake. 展开更多
关键词 ski-jump takeoff deck motion ship airwake SINKAGE
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Investigation of the environmental impacts of steel deck pavement based on life cycle assessment 被引量:4
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作者 Bo Wu Ren Haisheng +2 位作者 Geng Wei Gao Hui Qian Zhendong 《Journal of Southeast University(English Edition)》 EI CAS 2020年第3期334-340,共7页
To investigate the environmental impacts of steel deck pavement through the whole life cycle,the steel deck pavement was divided into five stages:raw materials production,asphalt mixture mixing,pavement construction,o... To investigate the environmental impacts of steel deck pavement through the whole life cycle,the steel deck pavement was divided into five stages:raw materials production,asphalt mixture mixing,pavement construction,operation management,and pavement removing stage.Based on the process-based life cycle assessment(PLCA)method,the calculation methods of energy consumption and gas emissions of two typical steel deck pavement systems(EA+EA pavement and GA+SMA pavement)were determined.The data lists of two pavements were analyzed,and the calculation model was built.Four characteristic indices including primary energy demand(PED),global warming potential(GWP),acidification potential(AP)and respiratory inorganics(RI)were used to quantify the environmental impacts of two pavements.The results show that the environmental impact of the GA+SMA pavement is more than 1.3 times that of the EA+EA pavement.Moreover,the critical stage of energy-saving and emission-reduction of EA+EA pavement and GA+SMA pavement are the raw material production stage and asphalt mixture mixing stage,respectively. 展开更多
关键词 steel deck pavement environmental impact life cycle assessment energy consumption gas emission
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