The research with an emphasis on the effects of concrete,tensioning methods as well as stress differences between upper and lower fibers on creep deformation of track girders was carried out.
以实际工程的轨道交通预应力混凝土梁为原型,以跨中截面应力等效与施工工艺相似为原则,共设计6根1∶5大尺度模型梁,对其施工过程中的徐变性能进行了试验研究,重点考察混凝土种类、预应力筋张拉方式和截面应力差等因素对轨道梁徐变变形的影响。
Based on the available long-term deflection prediction data of Humen bridge,we analyze the creep deformation of prestressed concrete box girder of large span continuous rigid bridges in several stages theoretically by use of FEM so as to find out the relation between mid-span upper and lower edge stress dispersion and the structure creep def.
根据已测得的虎门大桥连续刚构桥挠度长期观测数据,建立有限元模型,分阶段对大跨连续刚构桥预应力混凝土箱梁的徐变变形进行理论分析,探讨主梁上下缘应力差与结构徐变的关系。
Increment method is the most effective method to calculate creep deformation and internal force in indeterminate structure on every constructed stage.
为了研究由徐变、收缩引起的变形对桥梁结构的影响,以力的增量形式推导出计算各施工阶段徐变次内力、徐变变形的递推公式,同时将本文的递推公式和传统的位移增量递推公式分别编制计算程序,利用有限元原理就奉化江大桥的施工结束阶段时徐变次内力和徐变变形进行模拟计算,并对两种计算结果进行了比较,提出一种有效计算混凝土桥梁徐变效应的方法。
In order to guarantee the stability and safety of trains driving, the post creep deformation of high-speed railway bridges must be strictly controlled.
为保证列车行驶的平稳性和安全性,高速铁路桥梁的后期徐变变形必须严格控制。
Shrinkage and creep of high-strength lightweight aggregate concrete;
高强轻骨料混凝土收缩和徐变试验
The sidewall fracture of the shaft and the creep of concrete;
井壁破裂与砼的徐变破坏
Long-period contraction creep forecast of concrete based on short-period test;
基于短期试验预测混凝土长期收缩徐变
Vertical deformation calculation of the high-rise concrete structure resulted from creeping
高层混凝土结构由徐变引起的竖向变形计算
Based on the background of Maocaojie Arch Bridge, a test study was made of the creeping of high-performance concrete by simulating the actual concrete percentage and sectional stress state of an actual section.
以茅草街钢管砼拱桥为背景,采用实桥混凝土配比,模拟截面应力状态,进行高强混凝土徐变试验研究;测试并绘出混凝土徐变发展曲线,与AC I209(82)、CEB-F IP(M C 78)、CEB-F IP(M C 90)公式计算结果进行对比,提出了高强混凝土徐变系数近似估算式。
In order to understand the factors influencing the creeping of concrete with compound ultra-fine fly ash (CUFA), the creep behavior of C50 concrete with CUFA and C50 ordinary portland concrete were tested by parallel experimental methods.
用对比实验方法系统研究了原材料组成、养护制度以及加载龄期等因素对强度等级为C50的复合超细粉煤灰(compound ultra fine fly ash,CUFA)混凝土和C50普通混凝土徐变的影响规律,并分析了相应的影响机理。
Analysis Method of Construction Process and Creep Shrinkage Effects in Mega-Frame Structure;
巨型框架考虑施工过程和混凝土收缩徐变影响的分析方法
The shrinkage and creep secondary internal forces in steel-concrete composite girders are discussed by the analysis method.
根据钢-混凝土结合梁的受力特点,考虑采用有支架施工方法,由力的平衡条件和变形协调条件,分析结合梁中由混凝土收缩徐变引起的内力重分布,以此为基础,进一步提出了连续结合梁内力重分布的计算方法。
The influence of concrete creep and shrinkage is considered a.
以由此确定的斜拉桥初始状态作为施工非线性倒拆分析的初始状态,倒拆分析的过程中需要考虑相应阶段的混凝土收缩、徐变影响,倒拆分析的结果作为斜拉桥施工阶段的斜拉索张拉力,即斜拉桥施工阶段的最终优化结果。
Study on Creep Deformation and Construction Technique of Tianjin-Binhai Light Railway Bridge;
津滨轻轨桥梁徐变变形分析与施工技术研究
Analysis on creep strain for ready-mixed concrete during shrinkage
商品混凝土收缩过程中的徐变变形分析
Analysis on the Contraction and Time Deformation of Long-spanned PC Cable-stayed Bridges
大跨度PC斜拉桥收缩和徐变变形分析的研究
Experimental Study on Creep Deformation of High-performance Concrete Bridge with Ballastless Track
无碴轨道桥梁高强混凝土徐变变形的试验研究
Vertical deformation calculation of the high-rise concrete structure resulted from creeping
高层混凝土结构由徐变引起的竖向变形计算
Freyssinet flat jacks may be required to compensate for distortions arising from creep and shrinkage.
弗涅新奈氏扁千斤顶可用以调整收缩与徐变产生的变形。
Whole structural concrete creep effect research based on deformed energy principle
基于变形能原理的高层混凝土整体结构徐变效应分析
DEFORMATION ANALYSIS AND APPLICATION OF THE AXIAL COMPRESSIVE PILLAR CONSIDERING THE CONCRETE CREEP
考虑徐变时轴压钢筋混凝土柱的变形分析及应用
The melody is lingering, and rich in variations.
旋律悠长徐缓，富于变化。
innumerable variations
无数的变化 [变形]
The concrete is said to creep.
我们称这时的混凝土产生了徐变。
Study of RCC gravity dam temperature creeping stress
碾压混凝土重力坝温度徐变应力研究
Study on Creep of Reinforced Concrete Beams Based on B3 Model;
基于B3模型的钢筋混凝土梁徐变研究
Experimental Research on Shrinkage and Creep of Prestressed Steel Reinforced Concrete;
预应力型钢混凝土收缩徐变试验研究
Research on Concrete Creep and Application in Pre-camber of Bridge;
混凝土徐变与桥梁的预拱度设置研究
The Creep Effects Analysis of Prestressed Concrete Rigid-Framed Arch Bridge;
预应力混凝土刚架拱桥徐变效应分析
A Research Into Land Use Change and Driving Factors;
徐州市土地利用变化及驱动因素研究
On the Thought Development of Xuxu s Stories;
论徐訏小说创作中的思想演变与发展