溫縮應力 的英文怎麼說
中文拼音 [wēnsuōyīnglì]
溫縮應力
英文
temperature contraction stress-
Some other defects in castings are well - defined cracks and hot tears that develop during solidification, under combination of stress concentration from uneven contraction and the metal ' s low strength at near - melting temperatures
鑄件內部的其它一些缺點是,凝固過程中,在不均勻收縮造成的應力集中和接近熔點溫度下金屬的低強度的綜合作用下,出現的清晰裂縫和熱撕裂。Shrinkage stress was found to increase linearly with cure temperature.
我們發現收縮應力隨固化溫度直線增加。This thesis investigated and researched on non - loaded crack, especially those caused by thermal - shrink, and analyzed the thermal - shrink stress of beam, slab and continuous - wall, found that according data of civil and overseas offered thermal - shrink calculating formula without considering effect of factors, such as the cement quantity, using of aruhuesiru, aggregate size and quantity of sand, which made the result data smaller. in addition, there are not enough construct measure in code
本文對非荷載裂縫,特別是溫度?收縮裂縫進行了調查研究,並對兩端或四周約束的梁、板和底部約束的地下連續墻進行了收縮應力分析,發現國內外有關文獻給出的收縮計算公式沒有考慮泵送商品混凝土的水泥用量、外加劑使用、骨料粒徑和砂用量等因素的影響,計算出的混凝土收縮量往往偏小;另外, 《規范》中針對溫度?收縮裂縫的構造措施不足。It has a good compensation to shrinkage, and can improve the anti - cracking and anti - penetrating performance of concrete. it is often added to concrete to produce expanding concrete or the anti - cracking and anti - penetrating concrete, which are widely used in such engineering as waterproofing, anti - penetrating, mending etc. the expansion admixture include at present sulphoaluminate such as uea, ea - l etc ), calcium oxide, and some composite expansion admixtures
混凝土膨脹劑在普通混凝土中可抵消干縮或溫度降低引起的拉應力,起到良好的補償收縮作用,能提高混凝土的抗裂防滲能力,常用於配製膨脹混凝土或抗裂防滲混凝土,廣泛地應用於防水、抗滲、修補等工程中。If the surface is covered or watered after casting of concrete, the influence resulted from change of environmental temperature and relative humidity on concrete will decrease to some extent. then the shrinkage stress will also decrease and the probability of cracking will be reduced as well
混凝土澆注完后對表面進行覆蓋或澆水養護,可以很大程度上地減少外界溫濕度變化對混凝土內部的影響,減小了混凝土的收縮應力,從而降低混凝土開裂的可能性。Recently, train is running faster and faster, and considering the stability and security, seamless welded rails ( swr ) are used as the train orbits gradually. the temperature of the rails will vary with weather. so that the rails may release the energy due to the metal characteristic of expanding or contracting with temperature, there is some badly distortion in the swr, worsly occurring accidents on expanding orbits. the portrait thermal stress ( pts ) of the swr should be monitored in some parts regularly, as to avoid such accident
近年來,隨著火車的提速造成的穩定和安全問題,軌道逐步轉為採用無縫焊接鋼軌,隨著鋼軌溫度的變化,無縫鋼軌可能會因為熱脹或冷縮的金屬特性並且在扣件阻力小而且路基較差的路段釋放能量,可能會發生鋼軌嚴重變形,更甚者會發生脹軌跑道等嚴重鐵道事故,為了避免發生如此事故,有必要定期對鋼軌的溫度應力進行檢測。( 3 ) this thesis deduces the predigestion calculating method for calculating the section stress redistributed by the effects of concrete shrinkage, creep and difference temperature of pre - stressed lager cantilever composite beam with corrugated steel webs
( 3 )推導了預應力波形鋼腹板組合挑梁關于徐變、收縮及溫度效應下的截面應力分佈簡化計算方法。In this thesis, the new structure of pre - stressed cantilever composite beam with corrugated steel webs on steel - concrete composite spine girder was brought forward for the first time, a series of experimental researches and theoretical analyses relating to this new structure are conducted, including load transverse distribution rule, shrinkage and creep effect, temperature difference effect, and ultimate bearing capacity
本文提出大懸臂預應力波形鋼腹板挑梁這一新的構造形式,對其橫向分佈規律、收縮徐變、溫差效應以及承載能力等方面的受力特徵進行了分析和試驗研究。In order to monitor on - line expansion difference during operation for lai cheng power plant in shandong province, this paper not only describes the realization of data acquisition, but also gives curve of rotor thermal stress according to stress caculation. furthermore improve traditional warming process. it can be observed that by means of the on - line system the start - up duration has been decreased for no. 1 unit of lai cheng power plant start up
並依據萊城電廠機組的實際情況,經過理論計算給出了機組不同溫升率下的熱應力曲線,對傳統暖機過程進行了一定的改進,可縮短啟機時間,經萊城電廠1機組大修后冷態啟動檢驗完全符合實測值,證明本系統在實際運用中具有廣泛的推廣價值。The next this text is based on the appearance theories, according to the characteristics that the temperature dispersion of super thick mass concrete planceer of high - rise building primarily is an even difference in temperature and an even constringency, suppose the level shears are line with the displacement, adopting a big physical volume concrete of planceer in flexibility foundation for plank computing model, from theoretically deducing the difference in temperature of mass concrete contracting should basic formula of dint, and analysis the crack rule and the influence factor of mass concrete temperature contract, and bringing up the theory calculation method about temperature stress of mass concrete and the biggest whole method that sprinkle the length, at the same time according to basic formula of the temperature stress of mass concrete and the concrete construction experience, bringing five technique measures to prevent the temperature crack of mass concrete
其次本文以唯象理論為基礎,根據高層建築超厚底板大體積混凝土承受的溫差主要是均勻溫差和均勻收縮的特點,闡述了大體積混凝土溫度應力理論計算的簡化方法和最大整澆長度的計算方法,同時根據大體積混凝土溫度收縮應力基本公式和大體積混凝土結構施工經驗,提出了防止大體積混凝土溫度裂縫的五項技術措施。最後本文以廈門郵電大廈3 . 5m超厚底板施工為實例,從大體積混凝土溫度應力計算、混凝土保溫材料厚度計算、混凝土配合比的確定,鋼筋工程、模板工程、混凝土的泵送和澆築以及大體積混凝土內部溫度的監測和後期養護等方面進行了理論應用。In this paper, plasma - enhanced chemical vapor deposition ( pecvd ) technique was used to deposit the dielectric p - sio2 films and p - sion films on the silicon wafer under the conditions of low temperature and low pressure with teos organic sourse. this research was focused on the evaluation of film growth, hardness, stress, resistance and refractive index, by changing the experimental parameters including rf power, substrate temperature, chamber pressure, and the flow rates of teos, o2, n2. the results showed that the p - sio2 film was smooth, dense, and structurally amorphous
實驗結果顯示,用pecvd法淀積的p - sio _ 2膜是一表面平坦且緻密的非晶質結構的薄膜,與矽片襯底之間有良好的附著性;在中心條件時生長速率可控制在2600a / min左右;在基板溫度410時有最大的硬度可達16gpa ;其應力為壓縮應力,可達- 75mpa ;薄膜的臨界荷重為46 . 5un 。According to an engineering practice in pudong, shanghai, both the theoretical analysis and in - situ test are studied
結合上海浦東某實際工程,從理論上和實測中對支撐軸力中收縮和溫度應力進行研究。It is necessary to consider the influence of shrinking and temperature stresses when using reinforced stress to measure reinforced concrete strut axial forces
採用鋼筋應力計量測鋼筋混凝土支撐軸力時,收縮應力和溫度應力修正是必要的。Abstract : it is necessary to consider the influence of shrinking and temperature stresses when using reinforced stress to measure reinforced concrete strut axial forces
文摘:採用鋼筋應力計量測鋼筋混凝土支撐軸力時,收縮應力和溫度應力修正是必要的。In the account and analyses, we take into account the temperature stress in the cases : the base course is not cracking and the base course has been cracked. according to case of the base course cracked, the stress intensity factor of crack tip has been counted. according to case of the base course not cracked, the bend experimentation, the snap experimentation, the fatigue experimentation and the compress experimentation have been done, in addition, according to the latter, the finite element analyses have been done to demonstrated the temperature stress and the prime location of the glasgrid
在分析計算中,主要考慮基層開裂前和基層開裂后兩種情況下的溫度應力場,對基層開裂后,裂縫尖端的應力強度因子進行了計算;對基層開裂前的溫度應力場進行了室內小梁彎曲實驗、劈裂實驗、疲勞實驗、壓縮實驗,結合有限元分析結果,論證了基層開裂前的溫度應力場及格柵的最佳鋪設位置;研究成果在寧夏古王路上進行了驗證。The major reason of coming into being crack is the temperature shrinking stress by bringing of difference in temperature
由內外溫差引起的溫度收縮應力是致產生裂縫的主要原因。They cause the corresponding stresses which are ihe main factors to from crack in the mass concrete structures. it is obvious for crack to destroy the completeness, anti
由此而產生的溫度和收縮應力是導致混凝土出現裂縫的主要因素,從而影響基礎的整體性、防水性和耐水性,成為結構的隱患。Based on these theoretical studies, the temperature stress and shrinkage stress of plain concrete slab and reinforced concrete slab are calculated using finite element analysis software adina, and the differences between them are also made
在此理論研究的基礎上,通過有限元分析軟體adina來計算素混凝土平板構件和配筋混凝土樓板的溫度應力和干縮應力,比較其抗裂性能的區別。Then according to temperature gradient and humidity gradient, which are the essential factors inducing concrete cracks, distribution of thermal and moisture within young concrete and numerical methods to calculate temperature stress and shrinkage stress are systematically analyzed
然後針對引起混凝土開裂的本質因素即混凝土內部的溫濕度梯度,系統地分析了混凝土溫濕度場的變化規律及溫度應力和干縮應力的數值計算方法。Through project practice and many examinations, it is proved again that the temperature stress calculate formula provided in the text is fit for the fact, it is proved again that five technique measures to prevent the temperature crack of mass concrete provided in the text is useful
經過工程實踐表明,大體積混凝土溫度收縮應力計算公式是符合實際的,本文闡述的防止大體積混凝土溫度裂縫的五項技術措施是行之有效的。分享友人