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AbstractBased on the analyses of fundamental meteorological and hydrogeological conditions at the site of a tunnel in the cold regions, a combined convection-conduction model for air flow in the tunnel and temperature field in the surrounding has been constructed. Using the model, the air tempe..
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全球城市化进程的加快将会对人类将来的生存方式产生重大影响。随着全球人口的增长以及更多国家要求提高生活水平,世界必须提供更多食物,能源以及矿物资源来维持此增长趋势。解决这一难题的办法有三大渠道复合而成:农业用地的保护从而得到更深入的利用;日益增长的全球城市人口;对保护和改善环境日益增长的关注,特别..
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Along with the speeding of town house construction step, not a few areas with small residences set up one after another, many inhabitants move continuously into the new residence, their quality to housing request is more and more high, particularly pay attention to very much to some cracks circum..
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1. Abstract Materials and structural forms are combined to make up the various parts of a building, including the load-carrying frame, skin, floors, and partitions. The building also has mechanical and electrical systems, such as elevators, heating and cooling systems, and lighting systems. The ..
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AbstractThe combined effects of creep and shrinkage of concrete and relaxation of prestressing tendons cause gradual changes in the stresses in both concrete and prestressing tendons. A simple method is presented to calculate the long-term prestress loss and the long-term change in concrete ..
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摘 要本文通过多年的现场观察,通过查阅有关混凝土内部应力方面的专著,对混凝土温度裂缝产生的原因、现场混凝土温度的控制和预防裂缝的措施进行等进行阐述。关键词:混凝土;温度应力;裂缝;控制1 混凝土在现代工程建设中占有重要地位。而在今天,混凝土的裂缝较为普遍,在桥梁工程中裂缝几乎无所不在。尽管我们在施工..
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摘要:这是一篇关于讨论土木工程危机的文章。在过去,土木工程是人类文明的先驱;然而现在,他们很少地被当作领导者和革新者被觉察。在这里作者力劝那些土木工程师们为了赢回工程师行业的领导地位,要使现在的挑战变更,而且要使土木工程这个职业能够适应新的要求。全球化的进程简短地被讨论为现在这种情形的一个重要组..
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oncrete and reinforced concrete are used as building materials in every country. In many, including the United States and Canada, reinforced concrete is a dominant structural material in engineered construction. The universal nature of reinforced concrete construction stems from the wide availabi..
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ABSTRACTThe design and execution of ground investigation works for earthwork projects has become increasingly important as the availability of suitable disposal areas becomes limited and costs of importing engineering fill increase. An outline of ground investigation methods which can augment ‘t..