您要查找的是不是：
- average crack width 平均裂缝宽度
- Viscosified acid has been shown to provide wider crack width and improved acid retardation over that from thin fluid when used in carbonate acidizing. 巳被增稠的酸显视出较宽的裂缝和更好的酸阻滞性能,这就比稀酸液用于碳酸(盐)的酸化效果更好。
- Solving the corresponding differential equation, an analytical solution for the surface crack width of concrete covers is derived. 通过求解相应的微分方程，导出混凝土保护层表面裂缝宽度的解析解；
- It shows that finite element analysis could replace experiments to study the crack width of reinforced concrete beams in a way. 说明有限元分析在某种程度上可以代替试验对钢筋混凝土梁裂缝宽度进行研究分析。
- Based on the experimental research, a method to calculate the ultimate bearing capacity, the short-term stiffness and the crack width is put forward. 在试验研究的基础上，给出了缓粘结预应力混凝土梁的极限承载力、短期刚度及裂缝宽度的计算方法。
- The maximum pressure in crack tip increases with an increase in pressurization rate and decreases with increase in crack width. 裂纹尖端压强与裂纹入口压强比的最大值也受增压和几何条件的影响，增压越大，裂纹越窄，该压强比越大。
- In addition, contrasted in the experimental foundation has analyzed presently about the composite beam hogging moment area crack width formula. 此外，在试验的基础上，对比分析了现行关于组合梁负弯矩区裂缝宽度的计算公式。
- Based on crack width check formula,equations calculating the diameters of verticalreinforcement in random section of cantilever retaining wall are deduced. 从裂缝宽度验算公式出发,推导出计算悬臂式挡墙任意截面竖向钢筋直径的方程式。
- Maximum crack width of mortars with PC and CLS would be reduced, but the development rate of maximum crack width of mortars with PNS is faster in comparison with control mortars. 掺聚羧酸类和掺木质素系减水剂都减小了砂浆的最大裂纹宽度，而掺萘系则加快了砂浆最大裂纹宽度的发展速度。
- Using the longitudinal prestress t echnology,the bottom crack width of a 8 meters high sigle piece exterior cantile ver reinforced concrete wall at the height of 60 meters has been controlled to t he limitation of concrete rode. 通过采用竖向预应力技术 ,解决了 60m高度处单片 8m高悬臂钢筋混凝土墙根部裂缝宽度超过规范限值的问题 ;
- Abstract: Simplifying the formula in Code for Concrete Structure Design(GBJ10-89), we obtaine the appoximate formula of crack width, that is used to the beam of rectangular section in design. 文摘:对《混凝土结构设计规范》(GBJ10-89)中的裂缝宽度计算公式进行化简，得出矩形截面梁裂缝宽度实用计算公式，供工程设计时使用。
- Based on the design code of concrete structure(GBJ10-89), the paper gives the nominal tensile stress method of controlling crack width in prestressed concrete structure of punchy bars. 以混凝土结构设计规范(GBJ10-89)为基础，建立了强力钢筋做预应力筋的预应力混凝土结构用名义拉应力控制裂缝宽度的方法。
- Calculated expressions including reinforcement ratio are deduced,which are applied to calculate flexural strength,deflection and maximum value of crack width of RC beam with rectangular section. 推导了含有配筋率的用于钢筋混凝土矩形梁正截面抗弯承载力、挠度及最大裂缝宽度计算的表达式。
- Based on the traditional crack theory of reinforced concrete (RC) beams, the crack width prediction for RC beams strengthened with carbon fiber reinforced polymer (CFRP) sheets is studied. 摘要根据传统的钢筋混凝土裂缝宽度计算理论，对CFRP布加固混凝土梁的裂缝宽度计算方法进行了分析研究。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- The average output of the factory is 20 cars a day. 该工厂的平均产量是每天20辆汽车。
- His income is well below the average. 他的收入大大低于平均水平。
- A little crack detracts from the value of the vase. 小小的裂痕减损那个花瓶的价值。
- We fail one student per year on average. 我们平均每年有一个学生不及格。
- Meals average out at 5 per head. 膳食平均每人5英镑。
