查询词典 concrete

This paper analyzes the deviation of cambered form witch is composed of batten and sheet in concrete construction,and then educes a relationship between width of sheet,deviation of cambered form and curvature radius of camber,in order to solve the problem of assemble spline form work and increase construction quality of concrete curved surface.

分析了用板条和铁皮组装而成的曲面模板在曲面混凝土施工中的误差情况，同时给出了施工中板条宽度、曲面误差、曲面曲率半径之间的关系，以解决好拼装样条模板的问题，从而提高混凝土曲面的施工质量。

In the research of high cycle fatigue of concrete, the test means of cyclic loading between the set constant or various upper limit and low limit of force or stress has been extensively used. But this kind of test means can't be used to study the behavior of concrete low cycle fatigue under large strain.

同时高周疲劳问题研究中使用的在设定的力或应力的上下界限之间重复受力的试验方法已无法用于混凝土高应变低周疲劳性能的试验研究。

It was found that the low cycle fatigue character has close internal relations with the high cycle fatigue character. In the research of high cycle fatigue of concrete, the test means of cyclic loading between the set constant of force or stress has been extensively used. But this kind of test means can't be used in studying the behavior of concrete low cycle fatigue under large strain.

在研究中发现低周疲劳特征与高周疲劳特征有着密切的内在联系，但高周疲劳问题研究中使用的是在设定的力或应力的上下界限之间重复受力的试验方法，这种方法已无法用于混凝土高应变低周疲劳性能的试验研究。

Based on Three Gorges Project, the following aspects about the three typical embedding manners are studied:(1) The border condition of cyclic symmetry is applied to the finite element models with contact among cushion layer, penstock and concrete. The effects of elastic modulus, thickness and placement extent of cushion layer on the stress of its around concrete are analyzed. It is suggested that the ratio of thickness to elastic modulus can be used as an important parameter in the design of cushion layer.

因此，本文结合三峡工程建设实践，在收集和总结前人经验的基础上，以大型通用有限元分析软件ANSYS为平台，对不同埋设方式的巨型蜗壳结构进行以下几个方面的研究：(1)引入循环对称边界条件，考虑垫层-钢板-混凝土之间的接触摩擦，建立有限元模型；并对垫层敷设范围、垫层厚度和弹性模量等设计关键参数进行了优化，并把"垫层弹性模量与垫层厚度之比"作为参考指标进行设计。

The Company are the production and sale of concrete pump, pump fittings Professional manufacturer, has 31 major products, in conjunction, Chutian various brands and specifications of the concrete cylinder, master cylinder, swing cylinder, gate valves, etc..

本公司是生产和销售混凝土输送泵、泵车配件专业厂家，主要产品有三一、中联、楚天等各种品牌和规格的砼缸、主油缸、摆动油缸、闸板阀等。

The assessment formula for shear capacity was established as well, and in which various impact factors of shear strength was considered comprehensively.3. Directed against the main forms of transverse connection in concrete beam bridges, model test and finite element analysis were carried out to find the impact laws of damage on concrete T-beam bridges, in which the three ways of hinged joint, flange rigid connection and cross slab rigid connection were considered. Transverse distribution and degenerate state of transverse connection were studied under various damage conditions. Based on the analysis of test and simulation results, the rule of live load adjustment coefficient of T-beam bridge was put forward, as well as the calculation formula.4. In view of the influence of the damaged transverse connections to load effect, the load effect model was amended by live load adjustment coefficient.

依据损伤出现频率与重要性等级，提出典型损伤混凝土梁式桥按体系损伤、构件损伤和材料损伤三个层次进行评定的原则。2、基于构件和材料层次损伤评估研究成果，对比分析损伤机理和适用条件，提出了《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D62-2004)抗弯承载力修正计算公式、抗剪承载力修正计算公式以及综合考虑抗剪强度影响因素的抗剪承载力评定公式。3、针对混凝土梁式桥主要横向连接形式，分别按铰结、翼缘刚接和横隔梁刚性连接损伤对T桥梁桥承载能力的影响进行了模型试验和有限元分析，研究了不同损伤工况对T梁桥荷载横向分配的影响及横向连接状态退化情况。

This article has analyzed the concrete dehiscence origin, and proposed can prevent the concrete dehiscence the effective action.

本文分析了混凝土开裂的成因，并提出了能预防混凝土开裂的有效措施。

Mechanism of chemical attack of the deicer on concrete were investigated by measuring strength, expansion and the amount of scaling of concrete, and XRD, DTA analysis.

通过测定混凝土强度、膨胀和剥落量，应用XRD、DTA分析，研究了除冰盐(NaCl或CaCl2 )对混凝土化学侵蚀的机理。

To create a unitized rapid method to measure the chloride penetration resistance of concrete, the influence of test duration and electrolyte solution on the charge passed and depth of chloride penetration of concrete were studied.

为了建立统一的混凝土抗氯离子侵入性快速试验方法，进行了通电时间和电解质溶液对混凝土电量值及氯离子渗透深度影响的研究。

Corrosion resistance of concrete exposed to salt lakes is of special importance because of the extremely harsh weather in salt lake regions. Aiming at the desiccate environment of salt lake regions, in which the relative humidity ranges within 30%～50%, High Performance Concrete accommodated to the circumstance were proportioned on bases of field investigations, incorporated with proportion principals of HPC, cracking prevention effects of fibers and shrinkage compensation functions of expansion agent.

我国大西北有4大盐湖区共上千个盐湖，其中，新疆盐湖区有102个，青海盐湖区有33个，内蒙古盐湖区有370多个，西藏盐湖区有220多个。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。