聚丙烯纤维网加强混凝土在交通工程中的应用研究

阐述了聚丙烯纤维网对应用在交通工程中混凝土性能的影响，并与钢纤维、钢筋网等材料进行了对比；简要介绍了聚丙烯纤维混凝土的施工方法以及若干国内外典型的应用实例。     

钢纤维混凝土配合比设计方法

简明介绍钢纤维混凝土配合比的设计方法和对材料的基本要求。     

柔性纤维砂浆抗裂性能对比试验研究

研究柔性纤维对水泥砂浆裂缝的影响,通过对柔性纤维砂浆与普通砂浆进行对比试验研究,结果表明:柔性纤维砂浆与普通砂浆相比具有更优良的塑性收缩性能,分析了柔性纤维改善水泥砂浆塑性收缩干裂的机理以及不同柔性纤维对砂浆试件的阻裂效果.     

Development of the brake system design program for a vehicle

It is quite challenging to estimate the braking performance of a vehicle because the brake system is comprised of many parts, including a booster, master cylinder, and caliper. Calculation of characteristics such as braking force through vehicle tests requires much time and money. Therefore, the development of a method to estimate the braking performance of a vehicle using qualitative methods is beneficial. In this study, a program that can analyze the braking capabilities of a vehicle such as pressure, efficiency, and pedal travel is presented. The increase in disc temperature during braking as well as the properties of various boosters can be calculated using the proposed program. Dynamic characteristics of a vehicle equipped with a Load Sensing Proportional Valve (LSPV) were computed more precisely by obtaining the change in valve pressure according to the displacement of a suspension system. Since all input and output files are composed in the Microsoft Excel format, both design data management and database construction can easily completed.     

隧道钢筋混凝土结构的优化设计模型及应用

应用拉格郎日乘子法中不等式约束优化问题的基本理论，在建立隧道钢筋混凝土衬砌结构优化计算模型的目标函数基础上，推导出了相关计算公式，给出了其计算过程，并应用该方法对某个工程实例进行了分析比较。     

FRP增强砼缺口梁碳纤维薄板长度的优化方法

利用有限元软件和对比试验等方法,分析了碳纤维薄板增强砼缺口梁粘贴界面处过应力区的宽度与碳纤维薄板粘贴长度的关系。在现有加固规范提出的粘结延伸长度控制指标的基础上,提出了三点弯曲条件下增强砼缺口梁的碳纤维薄板合理粘贴长度表达式。     

Productivity evaluation method and design for manufacturability

Concurrent engineering was used to develop Nissan's new-generation V6 engine, with the aim of achieving high product quality and low cost. This involved close cooperation between product engineers and production engineers from the initial stage of development, and also the application of new approaches to design for manufacturability. This paper describes the “productivity evaluation method” that was developed at Nissan as a tool for managing the application of design for manufacturability, and the VQ development process which was based on this design concept.     

正交设计在加筋土边坡有限元分析中的应用

加筋土边坡稳定性受众多因素的影响,正交设计可安排多因素试验方案,从而较好地解决多因素试验问题。文中将模型参数看作随机变量,以安全系数为单指标采用正交设计进行分析。通过安全系数来研究参数的敏感性,从而得出最优方案设计。     

玻璃纤维土工格栅在高速公路路面工程中的应用

结合内蒙古东苏高速公路路面工程的施工，介绍了玻璃纤维土工格栅在高速公路路面工程中的应用技术。     

碳纤维修复补强技术在桥梁改建加固中的应用

通过采用碳纤维新材料新技术在桥梁修复施工中的应用范例分析，探讨了碳纤维补强技术的基本原理以及施工工艺和效果评价。     

旧路拓宽工程的路基拓宽设计方法浅议

本文通过对公路拓宽工程国内外相关资料以及上海、重庆等地实体工程的调查研究,对其典型病害和损坏机理进行了系统研究。在新老路基差异变形形成和其对路面结构响应方面作了深入分析的基础上,提出了以路基稳定为前提,新老路基不协调变形控制为核心的路基拓宽设计理论,并在实体工程中得到较好的验证。     

浅谈高速公路附属房建工程的总体规划与设计

结合广珠西线高速公路（二期）房建工程,对高速公路附属房建工程的建筑规模、施工图设计与审查以及造价控制等进行探讨。     

低周循环加载历史对碳纤维混凝土断裂特性影响的试验研究

研究了疲劳加载历史对碳纤维混凝土断裂能及断裂韧度的影响规律，对三点弯曲梁预先施加等幅和变幅疲劳荷载然后通过稳定的断裂试验测得各试件的荷载－－加载点位移全曲线及荷载－裂纹嘴张开位移全曲线。最后与未加疲劳荷载的准静载试验测得的碳纤维混凝土断鲜明参数作了对比。试验结果证明：当预疲劳荷载的幅值超过某一特定值后，碳纤维混凝土的断鲜明参数降低，即碳纤维混凝土垢断裂参数是与循环加载幅值有关的物理量。     

加筋土挡墙设计与施工技术要点

内蒙古呼伦贝尔市绥满国道主干线牙克石至海拉尔一级公路经过鄂温克旗大雁街区,设置互通立交,引道路基两侧单位较多,为减少征地拆迁,方便施工,采用了加筋土挡墙工程技术.文章介绍了工程设计、结构计算方法及施工技术要点.     

桥用混凝土的系数配合比设计法

阐述了混凝土系数配合比的设计方法与步骤 ,并通过设计示例指出 ,系数配合比设计要比常规的算法更简洁、准确、可靠     

公路工程地基承载力设计方法分析

为了合理确定公路工程地基承载力,将公路工程地基承载力问题分为桥台与挡墙地基承载力、公路涵洞地基承载力、公路填方路堤地基承载力三类分别论述。通过分析提出的涵-土共同工作弹簧模型,认为极限地基承载力理论不适用于公路涵洞地基承载力设计,并建议性地提出了涵洞下地基承载力等于涵侧土体下地基承载力的设计原则和涵洞与两侧土体沉降差尽量小的验算原则。通过试验,对比分析了填方路堤地基沉降随荷重发展的规律及其与载荷板试验的区别,并提出了用分层总和法设计地基承载力的方法。     

Development of a systematic and practical methodology for the design of vehicles semi-active suspension control system

In this paper, a novel systematic and practical methodology is presented for design of vehicle semi-active suspension systems. Typically, the semi-active control strategies developed to improve vehicle ride comfort and stability have a switching nature. This makes the design of the controlled suspension systems difficult and highly dependent on an extensive trial-and-error process. The proposed methodology maps the discontinuous control system model to a continuous linear region, where all the time and frequency design techniques, established in the conventional control system theory, can be applied. If the semi-active control system is designed to satisfy some ride and stability requirements, an inverse mapping offers the ultimate control law. At the end, the entire design procedure is summarised in six steps. The effectiveness of the proposed methodology in the design of a semi-active suspension system for a Cadillac SRX 2005 is demonstrated with road tests results. Real-time experiments confirm that the use of the newly developed systematic design method reduces the required time and effort in real industrial problems.     

工程地质、水文地质对工程设计质量的影响

通过对建成公路沿线工程地质、水文地质的调查,综合分析研究了公路工程与工程地质环境之间相互制约、相互影、相互作用的规律。指出,工程地质选线与地质勘探是影响工程设计质量的关键因素。     

一款小型电动环卫车的开发与设计

本文通过借鉴国内外整车开发经验,对一款箱式电动环卫车开发流程中的市场调研、整车方案设计与造型设计、整车各系统的结构设计与优化、样车试制与测试几个环节进行一定的介绍,为类似车辆的开发提供一定参考。     

Superpave沥青混合料设计方法的探讨

通过沥青混合料传统马歇尔设计方法与Superpave沥青混合料设计方法对比,总结出沥青混合料马歇尔设计方法不足之处和Superpave全新的设计理论。