Discussion on Construction Technology and Welding Deformation of High-Rise Steel Frame Structure

Because of urbanization,land resources in China’s cities has become increasingly scarce.Therefore,modern buildings are becoming taller,making high-rise steel frame structures the new favorite of the construction industry.However,the construction of high-rise steel frame structures requires advanced technology.If the construction technology is effectively implemented and the welding techniques of the construction personnel align with the requirements for high-rise steel frame structures,it can help mitigate deformations in the steel structure,thus preserving the overall construction quality of high-rise steel frame structures.To enhance the applicability of steel frame structures in high-rise buildings,this paper focuses on analyzing the optimization path for the construction process of high-rise steel frame structures.It introduces a tailored approach to control welding-induced deformations in steel frame structures,aiming to make a valuable contribution to the advancement of China’s construction industry.

The Construction Technology of Freeform Surface Spatial Bending-Torsion Steel Structure

Taking the construction project of the National Cybersecurity Talents and Innovation Base as an example,this paper studies the construction technology of freeform surface spatial bending-torsion steel structure based on structural design model transformation,including the parametric modeling of deepening design model,computer-aided bending and torsion frame production,flexible docking in the bending-torsion combination unit,and welding stress deformation,in hope to provide reference for similar projects in the future.

Analysis of Soundproof Technology of Assembled Steel Structure Houses

The problem of noise has always been highlighted in assembled steel structure houses.Therefore,it is necessary to use effective soundproof measures where steel beams intersect with the reserved line pipe openings,doors,windows,elevator shafts,and other locations.In this paper,we will investigate the areas with subpar soundproof performance in an assembled steel structure residential project and propose suitable noise control measures to address this issue.

Comparative study of microbial community structure in different filter media of constructed wetland

Comparisons of microbial community structure, in eight filter media of zeolites, anthracite, shale, vermiculite, ceramic filter media, gravel, steel slag and bio-ceramic, were undertaken by analyzing the phospholipid fatty acid （PLFA） composition. A total of 20 fatty acids in the range of C18to C20 were determined but only 13 PLFAs were detected in steel slag. They consist of saturated fatty acids, branched fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids. The variation of fatty acids was revealed in the relative proportions of these fatty acids in different media. The aerobic prokaryotes were the predominant group in all media. The PLFA composition showed significant differences among the eight different media by Tukey＇s honestly test. It was found that steel slag was significantly different in the microbial community as compared to other filter media, probably due to its alkaline effluent. Steel slag alone is probably not a good choice of substratum in constructed wetlands. The principle components analysis （PCA） showed that zeolites, bio-ceramic, shale and vermiculite had a similar microbial community structure while steel slag and ceramic filter media were distinct from other media.

A Virtual Erection Simulation System for a Steel Structure Based on 3-D Measurement Data

he virtual erection simulation system was explained for a steel structure including ship and ocean plant blocks. The simulation system predicted the erection state to optimize any gap or overlap of blocks based on 3-D measurement data. The blocks were modified （cut） on the basis of the simulation result on the ground before erecting them by crane. The re-cutting process was not required and the blocks were erected into a mother ship speedily. Therefore, the erection time is reduced, increasing the dock turnover.

Research on Construction Process of Steel Box Girder Bridge and Its Stress Analysis

The paper introduce the construction method of large segment hosting and its difficulty, and drawing up corresponding liner and stress monitoring plan. The paper gives the calculation method of shear area for such a big cantilever thin-walled steel box girder section, namely the shear coefficient computation theory of Professor Hu Haichang, and the use of this shear area perfect beam element model, structure model and the experiment prove that the shell model is more consistent, given a certain reference for similar section project.

Numerical Analysis of the Structure of High-Strength Double-Layer Steel Plate Concrete Shaft by Drilling Method of Water-Bearing Weak Rock Formation

In order to ensure the safety of coal mine shaft construction, a double-layer steel plate concrete composite shaft wall structure was proposed. However, fewer studies were conducted on this structure, which made engineers too confused to fully recognize its feasibility of this structure. Hence, based on the previous experimental research on the Taohutu mine construction project in Ordos in Inner Mongolia, this research paper aims to provide a widely deep numerical analysis by the usage of the finite element software, in fact, to establish the corresponding numerical analysis model and make a comparison with the experimental data to get the rationality of the verified model. The influence of the composite characteristics of the steel plate and concrete on the ultimate bearing capacity and stress field of the shaft wall structure is studied here through the method of multi-factor analysis. Also, the optimal design scheme of the double-layer steel plate and concrete composite shaft wall structure is proposed in this research paper.

Information Construction Technology of Free-Form Surface Steel Grid

Taking the construction project of National Network Security Talents and Innovation Base Exhibition Center as an example,the application of building information model in the construction process of free-form surface steel structure is analyzed in this paper.The results show that the application of Building Information Modeling(BIM)technology to the construction of free-form surface structure improves the work efficiency of the construction team in multi-disciplinary collaboration,surface component manufacturing,and construction process design,and subsequently improves the construction speed and construction quality.

Construction Technology for New Arched All-Steel Earth-inserted Tunnel

According to the influence of climatic conditions on vegetable production in the Yangtze River Basin,the existing arched tunnel was improved through investigation to provide guidance for the construction of arched steel tunnels in this area.

Tekla Structures软件在油气田地面工程加工设计中的应用

为提高油气田地面工程建设质量和效率,工程详细设计完成后进行加工设计十分必要。文章结合中石化胜利油建工程有限公司在伊朗和加纳的油气田地面工程项目,详细介绍了应用Tekla Structures软件进行钢结构加工设计的优越性和具体做法。该软件能快捷、准确地创建结构3D模型,且自动生成所需的图纸和各种精确报表,便于发现加工设计中的问题从而进一步优化设计,对节约工程成本和缩短工期具有重要意义。

Design and Construction Strategy of Arched Continuous Rigid-frame Bridge

With the current rapid development of urbanization in China,people's living standards have been greatly improved.In the context of such a development background,the requirements for road traffic are getting more stringent,especially for bridge projects.The arched continuous rigid-frame bridge was developed under this social background.The advantage of the bridge lies in the design of a bridge model that integrates various functions such as transportation,landscape,and sightseeing.Based on the above,this paper first refers to the case to analyze the design and construction strategy of the arched continuous rigid-frame bridge,in hope of providing a valuable reference for relevant personnel.

新质生产力背景下装配式钢结构建筑标准化施工策略研究

随着新质生产力的快速发展,装配式钢结构建筑作为一种绿色、高效的建筑方式,正逐渐受到广泛关注。本文在分析了其优势与面临的挑战后,提出了新质生产力背景下装配式钢结构建筑的标准化施工策略,为相关领域的实践和研究提供参考。

超高层建筑钢结构施工的关键技术和措施

随着城市化的不断推进,超高层建筑的兴建成为城市发展的一种趋势。在超高层建筑中,钢结构因其轻质、高强度等特点,成为超高层建筑的首选方案。文中通过对钢结构特征的分析,深入剖析了超高层建筑中的钢结构施工流程及影响因素。在此基础上,详细讨论了柱基础检查、钢柱吊装和钢柱连接等关键技术与应用措施,包括了施工过程中的质量监控、安全管理和技术检测等方面,旨在为超高层建筑钢结构施工提供可行的解决方案。

大跨斜撑钢结构预应力基础施工全过程受力分析

大跨斜撑钢结构被广泛应用于大型遗址保护工程,基于此,对钢结构基础预应力施工全过程进行研究,发现在结构自重和施工荷载的作用下,柱脚会产生较大的水平推力。由于桩基础的水平承载能力有限,在桩帽之间安装预应力基础梁,以平衡上部结构的水平荷载分量。通过数值模拟对工程实例进行施工分析,以确保关键构件的应力和桩顶位移在极限范围内。

高烈度区多层长悬挑钢结构设计

长安乐传媒港是十四届全运会重要配套项目,为南侧带3层大悬挑的不规则复杂结构,最大悬挑长度38.5m。主体结构采用钢结构框架-支撑体系,悬挑部分采用钢桁架结构。针对大悬挑结构设计难点开展了分析和研究;重点介绍了整体结构方案选型、结构整体分析结果以及结构抗震性能化设计结果;也重点介绍了单人行走激励和人群激励下悬挑钢桁架舒适度分析,考虑长悬挑结构安装过程、卸载顺序和楼板刚度形成次序的施工模拟分析,以及长悬挑对基础设计的影响。结果表明,本工程的多层长悬挑构结构具有较高的安全储备,整体结构具有良好抗震性能;长悬挑结构设计中需要特别关注施工过程的影响,基础设计时应考虑竖向构件受拉的不利影响。

杭州电竞中心车辐式索承网格屋盖结构设计

索承网格结构是一种新型空间结构形式,广泛应用于大跨度空间结构中。针对杭州电竞中心车辐式索承网格屋盖结构进行分析和设计,采用MIDAS有限元软件进行索张拉施工方案设计与仿真,采用ABAQUS有限元软件进行稳定性分析和大震动力弹塑性分析。分析结果表明:在施工过程各个阶段,屋盖钢结构构件应力比始终小于1,索拉力小于索破断力的30%;施工完成时,与设计值相比,屋盖结构最大竖向位移和索内拉力的误差分别为6%和4%;屋盖结构稳定安全系数为9.63,单层网壳结构稳定安全系数为31.2,均大于规范规定的2.0,屋盖结构稳定性满足要求;初始缺陷对本工程单层网壳的影响很小;在大震作用下,屋盖结构构件均未出现塑性变形,且预应力拉索不退张。

基于改进HFACS模型的钢结构施工安全事故人因分析

为探究导致钢结构工程施工安全事故发生的主要人为原因,以收集整理我国2019年以来的105份钢结构施工安全事故调查报告为样本,构建改进的适用于钢结构施工安全事故的HFACS模型。对改进的HFACS模型中的致因因素进行频率分析,使用SPSS软件对各致因因素进行相关性分析。并利用网络层次分析法(ANP)确定各致因因素的权重。结果表明:“管理缺陷、监管不足、工人状况不佳、工人违规操作”是各层级中导致事故发生的高频因素,“管理缺陷-违规监督-工人状况不佳-工人技能失误”是导致事故发生的主要致因路径,组织影响层是导致事故发生的关键层级。针对高频因素、关键致因路径及关键致因层级分别提出预控建议。

深水FPSO吸力锚建造工艺

以某深水浮式生产储卸油装置(FPSO)的吸力锚建造为例,对吸力锚的钢制筒体、顶盖结构、内部切泥板、铸造吊耳及锚链等主要结构预制安装流程与吸力锚整体装船工艺进行阐述。研究结果表明:深水FPSO吸力锚在建造过程中通过制定合理的施工顺序、严格控制组对尺寸公差和焊接参数等措施,对整个项目的质量管控和工效提升至关重要,也为后期同类大型管状结构物的建造提供了有益的参考。

基于应用型人才培养目标的钢结构课程教学改革与实践

钢结构系列课程是土木工程专业的核心专业基础课,在人才培养方面具有突出的作用。文章立足土木工程应用型人才培养目标,结合钢结构系列课程自身的特点,给出了多元化的课程教学改革措施。教学改革实践表明,多元化课程教学改革措施,有效解决了钢结构系列课程在传统教学过程中客观存在的问题,锻炼了学生的工程实践能力,提高了课程的教学质量,并取得了显著的教学成果。多元化课程教学改革方案可以为相关课程的教学改革提供借鉴。

工业遗产项目钢结构施工关键技术研究

通过大运河杭钢工业旧址综合保护项目的实施,对钢结构加固、新建工程施工难点及其对应关键技术进行了深入研究及总结,主要包括大型钢结构斜桥的分段拆除安装、老旧钢结构管道保护施工、高炉炉体的高空大面积炉体防腐施工及室内大型幕墙龙骨安装。通过上述技术研发与应用,项目钢结构得以顺利实施,为其他项目提供了参考。