水泥混凝土路面伸缩缝(又称伸缩缝装置)的耐久性问题是一个涉及技术、经济和社会效益的综合性问题,在我国交通公路建设中一直受到足够重视.国内外对此的研究虽然已有数十年的历史,但就其耐久性问题却很少得到足够的重视,因而研究成果也不多.伸缩缝装置的耐久性,首先表现在耐久性设计方面,目前国内尚没有统一、全面而又系统的设计规范;其次,在使用过程中,由于人为或环境因素的影响,伸缩缝装置经常出现破坏和变形、裂缝、磨耗等现象.这就要求设计人员在设计中考虑到各方面因素,包括荷载、温度变化、环境条件、防水和排水要求等,对其进行科学合理的设计和施工;最后,在使用过程中,要加强养护及维修保养工作.水泥混凝土路面伸缩缝是道路交通设施中极为重要的组成部分之一.其损伤不但会影响到车辆行驶的平顺性和安全性,还会引起诸如交通事故等一系列的严重后果.据不完全统计,每年因水泥混凝土路面伸缩缝损坏造成的交通事故占到了总交通事故总数的70%以上.

鉴于环保PPP项目类型多样,各类型项目的核心矛盾和内在规律差异较大,导致可持续影响因素及其权重的不同.为提高环保PPP项目建设的可持续性,以项目类型角度为切入,运用扎根理论中数据收集和数据分析方法对其可持续影响因素进行识别,结合问卷调查和熵权法计算权重,最终得到具有项目类型特征的可持续发展影响因素及其重要程度.利于提高环保PPP项目的管理效率,对症优化可持续建设措施.

在工程项目群建设中,项目之间的关联性容易使风险事件引起的负面影响在项目群系统中扩散传染,导致项目之间发生连锁失败效应,影响系统稳定.为了构建风险传染分析模型,防范和应对风险传染问题,首先依据复杂系统理论,对项目群风险传染机理进行分析,提出包括项目组件物理结构和风险因素因果逻辑结构的双重风险传染概念模型.然后,基于此概念模型,采用超邻接矩阵改进的决策实验室法构建网络分析模型,并给出因素传染度、重要度、原因度和关键传染路径的评价指标计算方法.最后,结合实际案例进行模型验证,得出各风险传染主体的传染度排序,确定各传染主体的重要度和原因度属性,以及识别出2条风险传染关键路径.研究结果表明,工程项目群中存在多类型风险传染主体、多类型传染关系并存的风险传染机制,由网络模型分析得到的评价指标适用且有效.研究结果不仅有利于项目群管理者制定针对性的风险防范措施,提高风险管理效率,还可以进一步用于风险传染动态过程的研究.

装配式建筑的机电工程具有着专业性强、技术要求高以及辐射面广等特点,因此更加适合利用BIM技术来展开深化设计.基于此,本篇文章通过分析BIM技术的特点,结合装配式建筑与传统建筑机电工程的区别,提出了几点深化应用建议.

为研究预应力加筋碳纤维板(SCFRP)在实际加固工程中的应用情况,选用受损的混凝土梁和完好的试验梁分别进行加载,分析加固后损伤混凝土梁和无损混凝土梁的承载能力特性,并与普通预应力碳板加固梁进行对比.通过试验研究发现,预应力加筋碳纤维板加固受损混凝土梁能有效封闭梁的裂缝,提高梁的承载能力,在屈服荷载后期,梁的变形能力大,延性性能较好,碳纤维板的利用效率高.和普通预应力碳纤维板加固相比,预应力加筋碳纤维板加固效果优势明显,锚固可靠,值得在实际加固工程中大力推广使用.

近年来BIM技术在我国建筑行业运用广泛,各企业所采用BIM软件不尽相同,使得建筑设计阶段不同软件基于BIM的工程量信息存在一定差别且信息不能通用,导致与后期施工模型工程量信息对接和传递存在一定误差.通过工程实例,以广联达土建算量软件计算结果为标准,对比了不同建模软件工程量信息,分析了误差原因并提出了BIM设计阶段建模建议.

广西钦州坭兴陶拥有着悠久的历史和地域文化特色,面临时代的发展和变革,坭兴陶制品需要突破固有的产品设计和生产模式.通过分析坭兴陶的材料特性、成型方式及市场上已有的陶类小家电产品,明确其适合的小家电产品类型的设计方向,从而扩大坭兴陶产品的种类和应用范围.使其产品更符合时代的发展和市场的需求.

随着我国的信息化高速发展,市场上对于BIM专业人才的需求量逐渐增加,因此,对于应用型本科工程管理专业BIM人才培养模式进行探索和研究是非常有意义的.

顶推施工关键是导梁的设计和整个施工过程各构件的受力情况.本文结合某特大桥顶推施工中导梁的设计,用迈达斯软件模拟分析钢导梁在顶推过程中的各个工况,符合设计计算要求,得出该导梁的尺寸要求符合施工需求.钢梁顶推施工各个工况符合要求,满足施工需要,为此类工程施工提供借鉴经验.

本文针对于广西某幼儿园建筑,采用Ecotect对室内光环境进行模拟,并分析判断其室内主要功能空间的采光效果是否达到《绿色建筑评价标准》GB/T50378-2014要求[1].

以柳州市某地下车库独立基础加防水板抗浮设计为例,分析了独立基础和防水板受力特点和设计原则,并利用盈建科结构设计软件进行建模分析,提出可行的设计方法及所需注意的事项,为设计人员遇到类似工程参考借鉴.

By using the self-developed CFRP-PCPs, the mounted reinforcement was conducted on RC beams .A correction formula of deflection was deduced base on current Chinese codes , the calculated value is in good agreement with the experimental value .The experimental results show that compared with the mounted reinforcement of concrete beams by prestressed CFRP tendons , the embedded reinforcement of concrete beams by CFRP-PCPs not only effectively improves the structure of the force performance and deformation capacity , but also solves the problems of complex construction process of post-tensioned anchoring device , high costs, etc.

To study the anti-crack performance of concrete beam strengthened with near surface mounted carbon fiber reinforced plastics prestressed concrete prisms ( CFRP-PCPs), experimental studies on five concrete beams under monotonic loads were carried out, and the anti-crack perform-ance of concrete beam was analyzed. The results showed that the cracking load of reinforced concrete beam was improved; that the height and width of the crack are less than those of unreinforced beam;that the development of the crack in the reinforced beam had been effectively prevented with the in-crease of prestressing. Based on the analysis, the elastic modulus of CFRP-PCPs was modified, a numerical method for cracking moment of concrete beam strengthened with near surface mounted CFRP-PCPs was presented, and the average ratio of the calculated and experimental values was 0. 966. Comparisons show that the calculated values agree well with the experimental results.

Deflection tests of seven self-developed new CFRP -PCPs composite reinforced concrete beams were carried out .It was found by comparison that the deflection of CFRP -PCPs composite reinforced concrete beams of all the forced stages was smaller than ordinary prestress CFRP reinforced concrete beams .The deflection of the CFRP-PCPs composite reinforced concrete beams was related to the tension control stress and the cross -sectional area of the composite bar .With the increase of composite prestress and the area , the deflection of the members decreased to some extent .Based on the principle of equivalence of CFRP -PCPs composite reinforcement , the formula of short-term stiffness which suitable for prestressed reinforced concrete beams in “Code for Design of Concrete Structures”was revised.A suggested formula was put forward which applies to the new type concrete beams of CFRP -PCPs, and the proposed formula was used to compare the five test beams with CFRP-PCPs composite bar .The result shows that the calculated values were accordance well with the experimental values .

Based on the flexural experimental research of five reinforced concrete beams strengthened with near surface mounted carbon fibre reinforced plastics(CFRP)-prestressed concrete prisms(CFRP-PCPs composite reinforcement)of different control tension stress,the characteristics of mean crack width and maximum crack width were acquired with comparison and analysis of crack distribution and development under static loading.The results indicate that this type of the unique composite reinforcement has an inhibitory effect on development of crack width and crack height.Based on the calculation method for crack width in the current national standard and experimental data,the suggested maximum crack width of the reinforced concrete beams strengthened with near surface mounted CFRP-PCPs reinforcement under static loading was given.And the calculated values are revealed to be in reasonable matching the tested value.

Normal section of RC reinforced were analyzed. Through beam strengthened with Near-Surface Mounted （NSM） prestressed FRP the analysis method of the normal section of the coordination between the strain strength, cracking moment ,yield moment and ultimate moment formula were derived and optimized. Simple and practical formula was obtained. The calculated result agrees well with the experimental result, which is provided for future reference in research and design.

Civil engineering is a strong practical application of discipline,by integrating experiment projects of existing professional courses,to set up a separate re-design,integrated and open experiment course,students conducting their own experiments in the open lab,in order to train students’ability to experiment and innovation,to develop students’ abilities of hands-on and problem-solving and an initial understanding of the academic research,developing rigorous scientific approach and attitude.Measures taken and problems are discussed in implementation of the curriculum,Proposed organization and implementation of measures about the open experimental teaching.

By the tensile test,studied damage form,modulus of elasticity of elongation and other basic mechanical properties and average bond strength of Carbon fiber(CFRP) anchor with different anchoring length 240、300、350 mm.Based on the tensile test slip curve,using the finite element numerical simulation of ANSYS establish nonlinear spring element COMBIN39 element model to analysis CFRP band and the bonding medium epoxy mortar between the bond and slip,studying on the stress of anchorage segments with the anchoring depth variation and different anchorage length of anchoring segment stress analysis,for the research on the anchoring segment stress evolution has great significance.

For the complicated geographical condition in karst areas, The form of the rational choice c,f foundation is very important. To the author＇ s knowledge, in karst area punching pile is the most effective method of drilling. Through the Pro- ject, from the roof of the stable point of view, On the single pile bearing capacity of karst cave was analyzed, and Construction Technology of hole- drilled bored Dries were summarized.

Based on research of Carbon Fiber Reinforced Polymer(CFRP) in the anchor bolt at home and abroad,the application development and current situation of CFRP were described in the anchor bolt,analyzed on the basis of existing research results,and the lack of existing research were analyzed and compared,discussed research and application of ideas of CFRP in the anchor bolt.