查询词典 concrete

Concrete three point bending notched beams with reinforcing bar placed at three different positions are used to study the effect of reinforcing bar on crack propagation of concrete.

4通过在跨中预制缝的混凝土三点弯曲梁内的三种不同位置分别布置钢筋，研究了钢筋在混凝土裂缝扩展过程中的限裂作用。

The size of the blast pit, the damage area, pressure contour and stress-time curve in concrete with or without steel composite were analyzed. Also, the damage mechanism of concrete-steel plate composition under explosive loading was studied.

通过实际算例，比较研究了混凝土敷设钢板与否对成坑大小、损伤区、压力云图以及应力时程曲线等的影响，进一步研究了有钢板加固时混凝土在爆炸荷载作用下的破坏机理。

Our company is now facing the country to seek co-production partners, and the other to provide foam concrete block production line equipment, and foam concrete block production technology transfer.

我公司现面向全国寻求合作生产伙伴，另提供泡沫混凝土砌块生产线配套设备，及泡沫混凝土砌块生产技术转让。

It is shown from the parallel experimental results that the water tight fly ash concrete can substitute for the rubber water tight board, and the water tight fly ash concrete has more impermeability than the rubber board under the circumstances that permeability pressure of the tunnel is not very high.

在寒冷地区，隧道漏水还会使隧道路面冻结，顶部产生冰柱，影响隧道交通。对维护费用较高的隧道，诸如穿越含污染水层的供水隧道、可能由流沙在衬砌形成空隙的隧道、装有电气设备的隧道、以及要求美观的隧道如人行通道和地铁车站，都应采取防水措施。

In this paper, bond and anchorage stress conditions between concrete and high-strength smooth wire for pre-tensioned concrete members are discussed.

本文讨论和分析了在先张预应力混凝土构件中混凝土和光面高强钢丝之间的握裹和锚固应力的情况。

The article finally through analyzing of the Zhejiang YiwuBinwang bridge temperature load, obtained the CFST arch bridge temperature stress rules with the temperature load which is including from top to bottom and from margin to core of arch-rib when the temperature value、 steel pipe wall thickness value and marking value of concrete change. The rule is that the axial force、 bending moment, as well as the shearing force elevates along with the change of temperature increases, so the control section stress which is linear relationship is. The article further proved the change of steel pipe wall thickness and marking value of concrete is not remarkable influence on temperature stress and internal force of arch ribs control section.

文章最后通过对浙江义乌宾王大桥温度荷载分析，得出了在由上至下和由周边向核心呈梯度变化的温度荷载作用下钢管混凝土拱桥结构应力随温度值、钢管壁厚值和混凝土标号值变化时的规律，即：轴力、弯矩以及剪力随着温度变化值增大而增大；钢管混凝土拱桥主拱肋的控制截面应力值亦随之增大，基本呈线性关系；并通过计算论证了拱肋各截面应力、内力值同钢管壁厚的变化、核心混凝土标号变化无关。

Based on a bounding surface model of the concrete and elastic-plasticity constitutive relationship of steel, this paper establishes the finite element model of the self-stressing concrete filled steel tube short column under axial load and eccentric load. the mechanical performances are analyzed.

对本课题组共进行的37根轴压短柱的试验结果分析，采用分解分析的方法，回归出钢管自应力免振混凝土轴压结构核心混凝土的等效单轴本构关系，与传统的弹性、塑性、断裂、损伤等力学模型相比具有简单实用的特点，便于进行工程计算。

In order to improve the high-performance concrete quality of longer brittleness, lower tensile strength, particularly the less descending branch in stress-strain curve compared with that of ordinary concrete. The breakthrough of this thesis lies in the mixture of short carbon fiber. Four factors such as water-binder ratio, volume ratio of short carbon fiber and blending value of high efficiency water-reducing admixture were selected as variable. Experiment was carried out by utilizing uniform design. Regression equation was established by regression analysis of the compression strength and the split tensile strength separately utilizing SPSS software. The process of optimization was obtained with the aid of MATLAB. Finally the optimized ratio was acquired.

为了改善高强混凝土由於水泥自缩、湿涨造成的脆性大、抗拉强度低，特别是应力－应变曲线的下降段不及普通混凝土的特点，本文以掺入短碳纤维为突破口，选取水胶比、砂率、短碳纤维的体积比、高效减水剂掺量四个因素作为变量，利用均匀设计安排试验，用SPSS软件对抗压强度和劈拉强度分别进行回归分析而得到回归方程，用MATLAB进行优化处理，进而求出最优配比。

So,in the construction of breast wall concrete,a series of technique measures are taken in quality contral points as moldboard design, installation of embedded parts ,crack prevention of mass concrete and detail treatment,and achieve go.

为此 ，在戊码头的胸墙施工中，针对模板设计、预埋件安装、大体积砼防裂以及细部处理等质量控制点采取了一系列的综合性技术措施，并取得了良好的效果。

To reduce the brittleness of concrete, improve the wear resistance of concrete

降低混凝土的脆性，提高混凝土的耐磨性能

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了