durability period 中文意思是什麼

durability period 解釋
耐用期
  • durability : 疲勞破壞
  • period : n 1 時代；期；時期；期間；階段。2 〈the period〉現代，當代。3 周期；【地質學；地理學】紀。4 終結...
  1. This paper unfolds engineering disposition and theoretical research of negative temperature high performance concrete ( nthpc ) with the damage of many factors motivation, the project background based on qing - zang railway engineering, which is one of four - emphasized engineering during the tenth five - plan. due to the difference of environment of construction and service between nthpc and ordinary concrete, and therefore durability of nthpc is required to higher level. at a first, nthpc must avoid frozen damage at early age and possess anti - freezing property at later period, in order to meet engineering practicable application need, and this are two emphasized and difficult problems, as for nthpc ; by means of mechanism analysis about deicing - agent ingredient and anti - freezing at early period, adopting composite technique routine of mineral addition + anti - freezing element + water - reducer4 - air - entraining + anti - erosion of steel component etc, based on orthogonal experimental approach, fd - 1 composite functional admixtu re was manufactured, which has more property and orientation on qing - zang railway

    負溫混凝土由於和普通混凝土在施工環境及服役環境上存在的差異，因此表現為比普通混凝土更為較高的耐久性要求；負溫混凝土首先要避免早期的凍害以及具備長期抗凍性能，才能夠滿足工程實際應用的要求，這也是負溫混凝土必須解決的兩大技術關鍵；通過對目前常用防凍劑組分作用機理的分析研究及混凝土早期防凍機理探討，採用礦物外加劑+防凍組分+高效減水劑+引氣+阻銹組分功能復合的技術路線，通過正交試驗設計復配了適應青藏鐵路工程要求的專用多功能復合型外加劑fd - 1 ；並在此基礎上配製不同等級負溫高性能混凝土，開展一系列包括硫酸鹽侵蝕、氯離子滲透、抗凍融循環、收縮及耐磨性等耐久性能研究；通過對fd - 1組分和摻量的調整，優化負溫混凝土在施工特性、力學指標和耐久性三個方面的兼容、協調性。
  2. Self - densifying high performance concrete is well - performing concrete with the good performance of fluidity, anti - segregation and filling - up - space. with its own gravity and without any vibration, it can automatically fill up the space in and between fixed shutters and form self - densified concrete structure of ideal dynamic property and durability, therefore, it can accelerate construction progress of a building, shorten the construction period, secure concrete quality and improve the building ' s durability. in the mean time, it is conducive as well for environment protection and effects remarkable social and economic efficiency

    自密實混凝土屬于高性能混凝土，它具有高流動性、高抗離析性、高填充性的性能，在自重作用下無需振搗，自行填充模板空間，形成自密實的混凝土結構，有良好的力學性能和耐久性能，可以加快工程建設進度、縮短工期、有效控制混凝土的質量、提高建築物及構築物的耐久性，並有利於環境保護，具有較高的社會和經濟效益。
  3. According to the current situation of our country ' s highway transportation development, this paper has put forward the main problems of sustainable development of highway transportation confronts us ; through the identifying of the affecting factors in sdsht and based on time durability, the paper has classified the factors into long - period, middle - period and short - period factors, as well as strategy and suggestions to realize sdsht

    根據我國公路交通發展現狀，提出我國公路交通可持續發展面臨的主要問題；依據公路交通系統可持續發展影響因子辨識，按照影響的時間持續性，將其分為長時段影響因子、中時段影響因子和短時段影響因子，並進行了分析；提出了實現公路交通可持續發展戰略對策建議。
  4. Productive durability test and oxygen transfer performance test in clean water per diffuser for seven kinds of diffusers were studied respectively in this paper, and serving diffusive area, air flow, varied resistance, varied resistance after stopping air flow, diffusive strength were also investigated in the productive testing period

    摘要對7種曝氣器產品分別進行了單盤耐用性生產試驗、單盤清水充氧性能試驗以及對在大生產試驗期間的服務面積、供氣量、阻力變化、停氣后阻力變化、曝氣強度等方面進行了測試對比工作。
  5. Based on probability statistics and structure reliability theory, a method of calculating the durability period and reliability probability of reinforced concrete exposed to chloride environments is presented. the target reliability level that the time of reinforcement initial corrosion in concrete structure exposed to chloride environments is proposed in this paper. a method of predicting service life of concrete structure exposed to chloride environments is given in this paper

    建立了氯腐蝕環境下混凝土結構中鋼筋開始銹蝕的條件和耐久性極限狀態方程以及氯腐蝕環境下混凝土結構的壽命評估準則；以結構可靠度理論為基礎，提出了混凝土結構的耐久性分析方法和壽命預測方法，給出了氯腐蝕環境下混凝土中鋼筋不發生銹蝕的目標可靠指標，並結合一具體工程進行了耐久性評估。
  6. The large amounts of industrial factory will go into the ageing period that lots of them facing the danger of durability damage

    建國以後建造的大部分建築將陸續進入中老年期，鋼筋混凝土結構老化現象嚴重，面臨耐久性破壞的威脅。
  7. In our country, most of bridges were built in 1960s or 1970s, which were based on that time traffic discharge and development planning, so design criterion of these bridges were very lower. in addition, it was inevitable to bring about cracks > concrete rupture, steel rust ^ honeycomb and water proof layer failure, because some established bridges were built by poor construction and maintenance during the course of operating period. all above mentioned lead to durability and bearing capacity could n ' t gain to design standard

    由於我國很多橋梁建於上個世紀六、七十年代，基於當時的車流量和各方面的發展規劃，橋梁設計等級普遍偏低；另外，某些既有橋梁由於施工質量差和運營期間維護不到位，不可避免地會產生裂縫、混凝土破損、鋼筋銹蝕、蜂窩及防水層失效等缺陷，從而導致耐久性及承載力達不到設計要求。
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