A review of the current status and progress of steel arch bridges in China is presented in this paper. The existing steel arch bridges in China were analyzed in terms of steel material, span, structure type, main arch...A review of the current status and progress of steel arch bridges in China is presented in this paper. The existing steel arch bridges in China were analyzed in terms of steel material, span, structure type, main arch rib form and construction method. The comparison with CFST arch bridges and RC arch bridges is also conducted. It is shown that steel arch bridge has gain rapid development in China since 2000, characterized by long main spans. As for the span, most of the steel arch bridges have a span less than 250 m, while when the span exceeds 350 m, steel arch bridges are strongly competitive against CFST or RC arch bridges. Over 80% of the bridges are through and half-through bridge types, and the arch ribs are hingeless structures. The rise-to-span ratios of the arches are mainly between 1：4 and 1： 5. Most of the arches use solid box ribs, and a small portion of arches use truss ribs in which box sections are mostly adopted for the truss members. The cantilever method and scaffolding method are the two main construction methods used, but some other construction methods have also been developed.展开更多
There are more than eight different design standards in use for the existing railway bridges in China, which have different applicabilities for bridges built in different periods. In this paper, the design load standa...There are more than eight different design standards in use for the existing railway bridges in China, which have different applicabilities for bridges built in different periods. In this paper, the design load standards in different periods are introduced and compared; The working status of the railway is investigated. According to the developing trend of separating passenger and freight transports, by comparing the computed results of the bridge effect and the fatigue cumulative damage, the applicabilities of bearing capacity and fatigue are analyzed for existing bridges. The results indicate that the bearing capacities of 99% existing bridges are suitable for the demand of 26.5 t （axle-weight） freight trains. However, for culverts, bridges with spans less than 20 m, longitudinal and transverse beams of through bridges, suspenders of truss bridges and other locally-stressed members should be evaluated and reinforced due to the increasing axle-weight.展开更多
High performance concrete originated in the generation of high strength concrete, and it is a new high technology of concrete, is in common with high quality and in concrete. High durability on the perspective of impr...High performance concrete originated in the generation of high strength concrete, and it is a new high technology of concrete, is in common with high quality and in concrete. High durability on the perspective of improvement and become, use a lot of high quality raw materials and modern technology, is the main development direction of concrete. Because its comprehensive performance by the superiority of the focus of the society, the strict construction technology in the extensive application in the highway bridge, high performance can the use of concrete can improve the efficiency of its safety and avoid unnecessary accidents展开更多
Based on the custom of stone bridge and village, by categorizing and interpreting the relationship between Lufeng Bridge （鲁封桥） and Luqiao Village （鲁桥村） in Southern Shandong Province, China, this paper focuse...Based on the custom of stone bridge and village, by categorizing and interpreting the relationship between Lufeng Bridge （鲁封桥） and Luqiao Village （鲁桥村） in Southern Shandong Province, China, this paper focuses on discussing the dynamic of rural society change in China and the practice of village life world. It provides detailed materials of field research about folk life of stone bridge and village in North China. Here village life world not only includes the folk integration of their everyday life, but also covers local villagers cognitive attitude towards village, such as village history, legend, belief, ritual, clan and other everyday life styles. Expounding and reconstructing of village life world, shows the essential meanings and categories of bridge folklore, it also demonstrates the consequence of shifting connection between stone bridge and village life. Firstly, the crucial context of understanding village life world is still promising. Secondly, folklore fieldwork is an significant part to comprehend the connotation of village life world.展开更多
This paper summarized the three things included in concept of core-competitiveness： integrative ability, core technology and core product. It reviewed main factors for increasing core-competitiveness, which include c...This paper summarized the three things included in concept of core-competitiveness： integrative ability, core technology and core product. It reviewed main factors for increasing core-competitiveness, which include core technology, resource integration, information exchange and strategic alliance establishment. It studied the wildly used indicators in core-competitiveness assessment model, such as financial status, business management, technology innovation and enterprise culture. Through case study in China Railway Jiujiang Bridge Engineering Co.Ld, the writer got the conclusion that Chinese Railway and Bridge enterprises should focus on industrial integration and innovation to enhance core-competitiveness.展开更多
文摘A review of the current status and progress of steel arch bridges in China is presented in this paper. The existing steel arch bridges in China were analyzed in terms of steel material, span, structure type, main arch rib form and construction method. The comparison with CFST arch bridges and RC arch bridges is also conducted. It is shown that steel arch bridge has gain rapid development in China since 2000, characterized by long main spans. As for the span, most of the steel arch bridges have a span less than 250 m, while when the span exceeds 350 m, steel arch bridges are strongly competitive against CFST or RC arch bridges. Over 80% of the bridges are through and half-through bridge types, and the arch ribs are hingeless structures. The rise-to-span ratios of the arches are mainly between 1：4 and 1： 5. Most of the arches use solid box ribs, and a small portion of arches use truss ribs in which box sections are mostly adopted for the truss members. The cantilever method and scaffolding method are the two main construction methods used, but some other construction methods have also been developed.
文摘There are more than eight different design standards in use for the existing railway bridges in China, which have different applicabilities for bridges built in different periods. In this paper, the design load standards in different periods are introduced and compared; The working status of the railway is investigated. According to the developing trend of separating passenger and freight transports, by comparing the computed results of the bridge effect and the fatigue cumulative damage, the applicabilities of bearing capacity and fatigue are analyzed for existing bridges. The results indicate that the bearing capacities of 99% existing bridges are suitable for the demand of 26.5 t （axle-weight） freight trains. However, for culverts, bridges with spans less than 20 m, longitudinal and transverse beams of through bridges, suspenders of truss bridges and other locally-stressed members should be evaluated and reinforced due to the increasing axle-weight.
文摘High performance concrete originated in the generation of high strength concrete, and it is a new high technology of concrete, is in common with high quality and in concrete. High durability on the perspective of improvement and become, use a lot of high quality raw materials and modern technology, is the main development direction of concrete. Because its comprehensive performance by the superiority of the focus of the society, the strict construction technology in the extensive application in the highway bridge, high performance can the use of concrete can improve the efficiency of its safety and avoid unnecessary accidents
文摘Based on the custom of stone bridge and village, by categorizing and interpreting the relationship between Lufeng Bridge （鲁封桥） and Luqiao Village （鲁桥村） in Southern Shandong Province, China, this paper focuses on discussing the dynamic of rural society change in China and the practice of village life world. It provides detailed materials of field research about folk life of stone bridge and village in North China. Here village life world not only includes the folk integration of their everyday life, but also covers local villagers cognitive attitude towards village, such as village history, legend, belief, ritual, clan and other everyday life styles. Expounding and reconstructing of village life world, shows the essential meanings and categories of bridge folklore, it also demonstrates the consequence of shifting connection between stone bridge and village life. Firstly, the crucial context of understanding village life world is still promising. Secondly, folklore fieldwork is an significant part to comprehend the connotation of village life world.
文摘This paper summarized the three things included in concept of core-competitiveness： integrative ability, core technology and core product. It reviewed main factors for increasing core-competitiveness, which include core technology, resource integration, information exchange and strategic alliance establishment. It studied the wildly used indicators in core-competitiveness assessment model, such as financial status, business management, technology innovation and enterprise culture. Through case study in China Railway Jiujiang Bridge Engineering Co.Ld, the writer got the conclusion that Chinese Railway and Bridge enterprises should focus on industrial integration and innovation to enhance core-competitiveness.
