age to thermal 中文意思是什麼
age to thermal
解釋
慢化到熱中子能的中子齡-
Thermal deposits mainly formed during middle - late yanshanian age, related to extension structure, with main mineralization in qingfeng competent deformation zone, western shennongjia fault arch, northern huangling fault arch, xianfeng anticline of enshi platforman fold bundle
熱液型鉛鋅礦床主要形成燕山中晚期，與滑脫拆離構造密切相關，礦化主要集中於青峰強變形帶、神農架斷穹西部、黃陵斷穹北部、恩施褶皺束咸豐背斜、長陽褶皺束走馬坪背斜中。 -
Emu oil has since been shown to have significant improvements on virtually every skin condition, including psorias, eczema, acne, rosacea, keloids, age spots, stretch marks, radiation burns, thermal burns, dermatitis, dry skin, chapped lips, itching, sunburn, blistering and peeling, softening calluses, rashes, warts, minor cuts and scratches, dry cuticles, and bug bites
鴯油從那以後被顯示有重大改善在實際上每個皮膚條件，包括psorias ， eczema ，粉刺， rosacea ，蟹狀腫，年斑點，舒展標記，輻射燒，上升暖流燒，皮炎，乾性皮膚，破裂的嘴唇，發癢，曬斑，起水泡並且剝皮，軟化老繭，疹，疣，未成年人切開和抓痕乾燥表皮，和臭蟲叮咬。 -
Early age cracking of concrete has re - emerged as an important issue all over the world in recent years. the stress, due to restrained volume change related to thermal deformation and shrinkage in the early age concrete, is the main driving force for the deleterious cracking in the construction stage. during the development of the stress, creep, a very important property of concrete, is always developing. creep contributes to 40 ? - 50 ? reduction of the elastically induced stress in the restrained specimen. ring test, a qualitative test, can provide information to assess the potential for cracking of different concrete. an overview of ring test developed in recent years and mechanism of uniaxial tensile creep test is described in this paper at first. then, an innovative test equipment based on ring test is outlined
近年來混凝土早期裂縫問題再次引起全球工程界的廣泛關注.早期混凝土由於體積變形受到約束而產生的應力是導致混凝土開裂的主要因素.在混凝土應力發展的同時，混凝土徐變也在同時發生著變化.有研究表明，徐變能減少40 ? - 50 ?的早期應力.圓環試驗是用於定性評價混凝土材料抗裂性能的試驗方法之一.本文首先分析了圓環試驗和單軸拉伸徐變試驗的原理，創造性地將圓環試驗用於測量早期混凝土的干縮徐變，並設計了試驗方案 -
Creep stress is a key part of temperature stress. in the course of computation of thermal - creep - stress, elastic modulus of concrete is related to the age of concrete ; creep of concrete not only is related to the age of concrete, but also loading duration and the relation is complex
徐變應力是溫度應力的重要組成部分，在溫度徐變應力計算過程中，混凝土的彈性模量與加載齡期有關，混凝土的徐變度不但與加載齡期有關，還與持荷時間有關，而且關系相當復雜。 -
All concrete structures are exposed to volume changes caused by hydration reactions in the early age. if the volume changes are restrained, stresses is generated which will cause cracking when it overcomes the tensile strength. as the mechanical properties of early age concrete vary with time, especially the creep degree depends on the time elapsed and the time at loading, to calculate the stress of concrete structure is a complex nonlinear problem. the finite element method ( fem ) can take account of the evolution of the stiffness properties, the development of thermal strain, creep, shrinkage and so on. in this paper, a general approach for numerically simulating this type of behaviour is presented firstly. then, how to solve this problem is introduced by the general finite element software ansys using the initial stress method. finally, a detailed description of an example calculation that demonstrates the potential of the numerical simulation strategy follows
早期混凝土由於水化反應都會產生體積變化.如果體積變形受到約束就會產生應力，一旦超過混凝土的抗拉強度就會產生裂縫.由於早期混凝土的力學性能是隨時間變化的，特別是徐變，它不僅與加載時間有關而且同時隨齡期而變化，因此計算早期混凝土結構應力是較為復雜的問題.有限單元法不僅可以考慮混凝土剛度的變化，而且可以考慮溫度、徐變、收縮等因素.本文利用初應力法對通用有限元軟體ansys進行了二次開發，通過工程實例計算了高層建築地下室側墻早期混凝土應力的變化過程，並提出了相應的抗裂措施
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