Construction analysis on integral lifting of steel structure by the vector form intrinsic finite element

A newnumerical method based on vector form intrinsic finite element（VFIFE） is proposed to simulate the integral lifting process of steel structures. First, in order to verify the validity of the VFIFE method, taking the steel gallery between the integrated building and the attached building of Nanjing M obile Communication Buildings for example, the static analysis was carried out and the corresponding results were compared with the results achieved by the traditional finite element method. Then, according to the characteristics of dynamic construction of steel structure integral lifting, the tension cable element was employed to simulate the behavior of dynamic construction. The VFIFE method avoids the iterative solution of the stiffness matrix and the singularity problems. Therefore, it is simple to simulate the complete process of steel structure lifting construction.Finally, by using the VFIFE, the displacement and internal force time history curves of the steel structures under different lifting speeds are obtained. The results show that the lifting speed has influence on the lifting force, the internal force, and the displacement of the structure. In the case of normal lifting speed, the dynamic magnification factor of 1. 5 is safe and reasonable for practical application.

On the Construction of Plant Landscape Form in Urban Landscape Architecture

Design of plant landscape form is a critical part of plant landscaping, and it is an important direction of modern researches on urban plant landscaping to promote the development of plant landscape via the interaction between landscape form design and other means. By elaborating five major influence factors of landscape plants, namely "flexibility", "art", "subject", "mode", and "artistic conception", this paper explored the application of construction thinking in the construction of urban plant landscape form, in order to provide theoretical basis for the development of urban plant landscape form.

Research on the Construction Path of New Engineering+Curriculum Ideology and Politics

With the rapid development of science and technology and the transformation and upgrading of industry,new engineering construction has become the important direction of higher engineering education reform in our country.This research focuses on the“new engineering+curriculum ideological and political new form course construction path,”in order to meet the new requirements of talent training put forward by the development of new engineering.This paper analyzes the educational value and current situation of curriculum ideology and politics under the background of new engineering,and improves the ability of curriculum ideology and politics from the perspective of strengthening the teacher training system;optimizing curriculum ideological and political design,skillfully integrating into the ideological and political elements;and strengthening the cooperation between schools,enterprises,and family associations to enrich curriculum ideological and political resources.To build a collaborative education mechanism and form an all-round education pattern,the four aspects of the new engineering+curriculum ideological and political of the new form course construction path have been preliminarily explored,hoping to provide some references and guidance.

The Form Characteristics and Construction of the Public Space of the Oasis Traditional Settlements in Turpan

Based on the analysis of the form characteristics and construction of the public space of oasis traditional settlements in Turpan,and from the analysis and summary of the types,elements,scales and functions of the public space of the traditional settlements,this study put forward that the public space of the oasis villages can be divided into point space,line space and plane space,and the formation and evolution rules of the public space of oasis traditional settlements in Turpan were obtained.Explore the role of public space in the construction of traditional settlements’ overall space,so as to provide reference for the development and renewal of public space of the current similar oasis settlements.

The Construction of Formative Assessment Mode in Ethnic Minority Classes in Universities

From analyzing the current situations of formative assessment of ethnic minority students＇ college English in China and abroad, this paper gives the specific problems, the significance, and the research values of constructing the research. It tries to construct the formative assessment mode of ethnic minority class＇s college English on the basis of multimedia teaching, systematically and comprehensively investigates and analyzes the formative assessment＇s impacts upon the fostering of ethnic minority students＇ autonomous learning abilities, the impacts upon language learning and teaching, and the impacts upon the ethnic minority students＇ academic achievements and learning motives. The aim of this paper is to comprehensively enhance ethnic minority students＇ college English teaching qualities and the system of tests and assessments. The project based on relative theories and principals like language acquisition theory, humanism theory, constructivism theory, formative assessment, and summative assessment. According to the distinctiveness of ethnic minority college English teaching in science and technology, we are trying to construct the formative assessment system of ethnic minority college English teaching on the basis of multi-media network teaching mode. We comprehensively and systematically investigate and analyze the construction of the formative assessments＇ impact upon the cultivation of ethnic minority students＇ autonomous learning abilities, the impact upon language learning and teaching, the impact upon students＇ academic achievements, oral scores, and students＇ learning motivations.

Analysis on Pore-Forming Pouring Pile Construction Technology of House Building Project

Compared with the in-place pile, the pore-forming pouring pile is more simple and convenient, with a wider range of construction. In the actual construction process, it is able to pass through complex bottom layer and water layer underground without very high requirements in equipment. The actual bearing capacity of single pile is very strong, so that it can be better to adapt to the actual needs of different scales or the different geological conditions in building. And it has been promoted and used greatly in building construction work [1]. This paper introduces the concept of the pore-forming pouring pile technology, analyzes the pore-forming construction technology and the pile construction technology, then talks about prevention problems of the pore-forming pouring pile construction in House Building Project, at last draws a conclusion that the pore-forming pouring pile technology is the most basic construction technology and is the most effective and convenient way of construction.

Identity Construction Discourse in the Perspective ofInter-Subjectivity-The Case of Address Forms

In daily social communication,people mainly construct their own and others'identities through discourse,and the most representative and widely used of identity-constructing discourse is address forms.In this paper,we focus on the identity-constructing function of address formsand the cognitive collaboration of their subordinate categories at the conceptual level,where different forms of address formshave obvious selection preferences in expressing specific discourse functions.Addressing has a discourse function other than the referential function,and inter-subjectivityis its underlying motivation.

PRACTICE AND KNOWLEDGE ABOUT RECONSTRUCTION DESIGN OF TRADITIONAL BUILDINGS AND GARDENS

In this paper,the author sums up some essential knowledge from the practiceabout rebuilding traditional buildings and gardens in which the author has been engagedrecently.The view points are that one should discard the dross and select the essential,re-tain the symbolic form,grasp the overall style,embody local characteristics and space outthe distance of time and space between the new and old buildings.Finally,the author con-siders that the traditional form of buildings should not be used indiscriminately at allplaces in modern times.

Construction of Thin Concrete Lined Walls for Three Gorges Shiplock

With high rock slope in shiplock area, thin reinforced concrete lining walls are constructed for the shiplock system. The construction technology involves much complicated structures in formwork, frequent interference due to crossover working procedures, tight time schedule, high quality of reinforced concrete and showcase appearance requirements, hidden troubles affecting construction safety. With above-mentioned factors in consideration, a single-side-separated sliding formwork technology advanced from past sliding formwork experiences has been developed and applied successfully. This new technology is beneficial in quick and safe operation, capable to assure best quality and appearance of shiplock concrete works, and has filled up the gap in terms of construction sliding formwork in our country.

Construction Strategies of Public Activity Spaces in Residential Districts Based on Children's Activities

The relationship between children's activities and public spaces was analyzed and summarized from three perspectives, namely, children's demands on outdoor activity spaces, factors infl uencing children's behavior requirements, and planning strategies. The paper provided theoretical support for exploring the relationship between children's activities and public spaces, and proposed planning strategies for improving use effi ciency of urban outdoor public spaces and facilities, and creating public spaces capable of meeting children's psychological needs.

Research on the Separable and Combinable Object NP Construction

There is a separable and combinable object NP construction in modern Chinese.The modifier or the central part of it can be moved forward to the beginning as the topic.The combined construction delivers the objective expression,while the separated construction implies the subjective understanding.The transformation is driven by pragmatic factors.Firstly,the article discusses the combined and the separated constructions meanings.Secondly,the article analyzes the form differences which are caused by their meanings.At last,the article discusses the discourse function variation caused by the form transformation and introduces the objective and subjective differences of human natural language expression.

Logics of Constructing Chinese Form of Human Civilization Facing the Future:CPC and Development of Chinese Culture

As one of the oldest human civilizations,the Chinese nation once created brilliant ancient and classical culture.However,in transition to modernity,as China became a late comer of modernization,the Chinese nation has chosen the Party as the leading force in constructing its modern culture.Guided by Marxism,the Communist Party of China(CPC)has advanced

A Comparative Analysis of Owner-Contractor Agreements in the Turkish and US Construction Industry

Successful and cost-effective construction relies upon appropriate communication of the participants of the construction project. Hence, it is important to define the rights and responsibilities of the parties, and relationships among them. In this context, well-designed and complete agreement is essential and necessary for the successfully completion of a construction project within the desired time, quality and budget. In this paper, it is aimed to analyze and compare the owner-contractor agreements in the Turkish and the US construction industry. First, the importance of construction contracts and contractual elements of an agreement is determined, and then, the standard owner-contractor agreement which is used in the Turkish construction industry is analyzed and compared with the US standard owner-contractor agreement. Finally, the differences between these agreements are put forward, the lack and deficiencies of Turkish standard agreement form are determined, and appropriate suggestions are improved.

“信号与系统”新形态教材建设与教学应用的思考

教材作为教师组织教学活动和学生开展学习活动的重要载体,是达成教学目标的基本依据。以纸质教材为核心,以信息技术和互联网技术为手段,将数字资源与纸质教材充分融合的新形态教材,以其特有优势引领了教育信息化时代教材建设的新趋势。分析了近年来“信号与系统”新形态教材的主要特点,结合教学团队课程理念及建设资源,提出“信号与系统”课程新形态教材的建设路径,坚持内容为本、立足翻转课堂、融合信息技术、强化知识连通、促进泛在学习、赋能教学评价,并探讨新形态教材在教学中的应用成效。

张弦金属薄板空间结构模型试验研究

基于大跨空间结构“围护+结构”合二为一的设计理念,提出张拉金属薄板空间结构体系。金属薄板具有强度高、面内刚度大的特点,但其面外刚度较弱,对于大跨空间结构,在面外荷载作用下金属薄板变形控制难度大。因此,通过对金属薄板施加面内预应力提高其面外刚度,同时将索结构与预应力金属薄板结构相结合,构成新的张拉金属薄板空间结构体系,实现围护与结构在大跨空间结构设计上的统一;进行了平面尺寸为6m×4.5m的张弦金属薄板空间结构的模型试验,研究了该结构金属薄板间的连接、预应力施加、结构成形过程、静力加载特性等,并将试验结果与数值模拟结果进行了对比,最后对采用新结构体系的工程实例进行了数值分析。结果表明:张弦金属薄板空间结构体系在成形后具有良好的力学性能,能够充分发挥围护与结构相统一的优点,在各类大跨度料场封闭工程中具有广泛的应用前景。

马来西亚砂拉越日拔大桥主桥施工控制

马来西亚砂拉越日拔大桥主桥为(4.9+108.4+267.6+108.4+4.9)m双塔双索面混凝土梁斜拉桥,主梁采用双边肋π形截面,在塔处设三向约束,在过渡墩处利用竖向预应力进行墩梁固结。主梁施工采用前支点挂篮悬臂浇筑工艺,悬臂施工阶段不张拉纵向预应力钢束。为保证结构安全和施工控制精度,采用MIDAS Civil软件建立主桥有限元模型进行施工过程仿真分析,并引入挂篮单元,确定成桥目标状态。施工控制时,采取主梁线形和应力控制、斜拉索中间张拉、斜拉索三张时超张拉、边中跨不对称施工时边跨斜拉索分次张拉、全桥合龙后斜拉索放张等施工控制关键技术。结果表明:主梁高程误差为-51~28 mm,主梁最大拉、压应力均未超限,索力误差在±10.0%以内,满足设计要求。

先进设计与制造课程群及新形态教学资源建设与实践

在“中国制造2025”战略的引领下,制造行业对高素质复合型人才的培养提出更高要求。传统教学存在课程内容不成体系、教考分离、动手实践资源少等共性问题,难以满足高素质复合型创新人才的培养要求。课程群建设是专业建设与课程建设的桥梁,可以系统性协同规划完备的知识体系,在高等院校课程建设中运用得越来越广泛。在“互联网+教育”时代,构建多样化新形态课程教学资源,是提升创新型人才实践能力培养的必由之路。基于此,提出将产品创新设计与实践、互换性原理与技术测量、机械制造技术基础、现代设计方法和机械制造装备设计5门课程有机融合,形成一个具有系统性、整合性和协同性的知识体系。通过开展课程的数字化资源建设研究,持续完善课程的新形态教学资源,提高学生的学习积极性,促进教学质量的提高和学生创新实践能力的培养。

A Study on the Quality Control of Concrete during the Slip Form Erection of Pylon

The construction market of super-high-rise buildings and long-span bridges has recognized unprecedented expansion owing to the development of high performance and high strength materials and the advances achieved in the design and construction technologies. In parallel to the lengthening and enlargement in scale of the structures, securing quality control technology of concrete while reducing the construction duration using improved construction methods emerges as a critical problem for concrete structures. In the erection of concrete pylons, slip forming represents the latest method offering the advantage of reducing drastically the construction duration compared to other methods by adopting automated slip-up of the forms and enabling 24-hour continuous placing. This study determines the slip-up time of the slip form by evaluating the early strength through the surface wave velocity and develops lightweight GFRP form in order to secure the quality of concrete during the slip form erection of pylons. A slip form system is fabricated and mockup test is conducted to verify the performances of the developed techniques through the construction of 10 m-high pylon with a hollow section.

Development of an Efficient Tapered Slip-Form System Applying BIM Technology

Slip-form system constitutes the latest technology for the erection of elevated concrete pylons. This paper investigates the design of slip-form system applying BIM technology for the efficient development of the slip-form system. The considered pylon has a height of 10 m and presents the rectangular hollow section generally adopted in cable-supported bridges. The slip-form was thus designed to accommodate the tapered cross-section and changing thickness considering the continuous placing of concrete. In addition, the safety of the system was examined with regard to the various loads applied on the slip form along the construction. The design results could be verified visually through BIM and the applicability of the designed slip-form was validated in advance through virtual assembly and construction.

地外建造研究进展与科学技术挑战

随着深空科学与深空探测技术的不断发展,NASA、ESA以及其他一些国家纷纷提出地外空间中长期驻留设想及其地外建造相关计划。该文梳理了国内外地外建造相关战略,系统分析了地外建造的概念内涵及其发展;总结了地外建造结构设计、材料制备和建造工艺装备三方面研究进展;进而分析指出地外建造关键科学技术挑战。期待更多的学者关注地外建造这一新的研究领域,为我国深空探测贡献土木工程学科智慧。