大悬挑钢结构雨篷的设计与施工

通过某具体工程,运用3D3S结构分析软件对大悬挑雨篷的结构计算进行分析并对施工的主要步骤进行介绍。结果表明该雨篷设计及施工能够满足结构安全及使用功能的要求。     

Seismic design and engineering practice of a 10-story self-centering precast concrete wall structure

The increasing expectation of structures capable of fulfilling the requirements of minimizing post-earthquake repair or re-occupancy has led to the emergence of damage-control technologies. In recent years, self-centering precast concrete wall systems that are characterized by low damage as well as full prefabrication have become a popular topic. Previous research has shown that the system is not only capable to reduce the construction time but also has the characteristics of small residual displacement and quick restoration of normal service function after a major earthquake event. Nevertheless, there is still much to be studied for high-rise buildings and practical engineering applications. This paper introduces the process of self-centering precast concrete wall systems from conceptual design to detailing and construction aspects of a 10-story case study building. Specifically, the hybrid type of unbonded post-tensioned wall is adopted with mild steel functioning as the energy-dissipating component. The design and construction of mild steel take into account the requirements of both building function and replaceability. In addition, the lateral resisting system is decoupled from the gravity system using isolated joints for wall-to-floor connection. Various factors such as higher mode effects, torsional effects, and wind loads are considered in the design process in order to achieve the overall high performance of the structure. Finally, the numerical model of the designed structure is established and analyzed under both static and dynamic loading. Results show that the self-centering wall structure studied in this paper has satisfactory seismic performance, i.e., each component and joint can work to achieve the function as expected, and has broad engineering application prospects in the future.     

Severe rail wear detection with rail running band images

Rail wear occurs continuously owing to the rolling contact load of trains and is fundamental for railway operational safety. A point-based manual rail wear inspection cannot satisfy the increasing demand for rapid, low-cost, and continuous monitoring. This paper proposes a depth-plus-region fusion network for detecting rail wear on a running band, which is a collection of wheel–rail interaction traces. The following steps are involved in the proposed method. (i) A depth map estimated by a modified MiDaS model is utilized as guidance for exploiting the depth information of the running band for rail wear detection. (ii) The running band of a rail is segmented and extracted from images using an improved mask region-based convolutional neural network that uses the scale and ratio information to perform instance segmentation of the running band images. (iii) A two-channel attention–fusion network that classifies rail wear is constructed. In this study, we collected real-world running band images and rail wear-related data to validate our approach using a high-accuracy rail-profile measurement tool. The case-study results demonstrated that the proposed method can rapidly and accurately detect rail wear under different ambient light conditions. Moreover, the recall rate of severe wear detection was 84.21%.     

北斗精准定位在城镇燃气管道管理中的应用

本文阐述了北斗精准定位如何在城镇燃气管道管理中进行全面的应用。利用北斗精准定位技术,对管道高风险点进行快速精准定位,并把管道高风险点的地理位置数据和状态数据进行融合,解决城镇燃气管道管理精准性位置服务需求,实现管道运营管理过程的精细化和精准化管理。     

英国新拉纳克世界文化遗产整体性保护策略与管理方法

世界工业遗产地作为一种新的世界遗产类型,其保护的重要意义已经得到国际性的高度关注和广泛认同。通过对英国新拉纳克世界工业遗产地开发的代表性实例分析,从整体性设计理念的角度,分析探讨世界工业遗产地保护与管理的发展方式,以及对于达成城市经济、社会和文化整体可持续性发展的重要作用,以期为我国世界工业遗产地的保护与管理工作提供较为科学的发展思路。     

复式住宅设计心得

分别对有跃层的地下室住宅、完全跃层住宅、顶层设跃层的住宅等的设计形式作了介绍，并对各住宅的功能进行了分析，表明了形式和功能之间的关系在住宅空间设计上得到了充分的体现。     

上海铁路南站主站屋钢结构安装

由上海市机械施工有限公司承建的上海铁路南站主站屋钢结构,系直径为278m、高为42m、重约7000t的圆形建筑。针对地下通道遍布、钢结构安装在已建混凝土平台上、南北广场同步施工、沪杭线从轴线间通行等复杂施工工况,研制了一套“600t履带吊定点就位、123m旋转龙门吊安装到位”的施工方法,取得了较好的效果,对今后类似工程具有借鉴作用。     

岩溶地区城市地下浅埋隧道工程技术研究

结合广州地铁二号线三元里折返线工程的设计施工,深入分析研究岩溶地区浅埋隧道工程的设计施工技术,尝试采取的各种水文、地质、物探等试验及勘察手段,简便可行,结论真实,能够全面客观反映该复杂地层的工程水文地质特征,对采取相应工程处理措施提供了充分可靠的依据。     

现阶段我国城镇建设的发展规划

城市是国民经济的主要载体,是经济和社会发展的重要依托,是对外开放的窗口。随着工业化和现代化进程的加快,城市对于改革开放和现代化建设的导向、带动作用越来越重要,城市发展的水平体现了一个地区经济、社会发展的综合实力。城镇建设和发展对于建立和完善社会主义市场经济体制,促进社会经济发展关系重大。在这样的形势下,城市规划工作面临着新的机遇,要求也更高。     

对文物古建筑消防保护资金匮乏及对策的思考

文物古建筑的保护,是一项系统而又复杂的工程。而文物古建筑长期得不到有效保护的根本问题就是资金匮乏。要切实解决这个问题,需紧紧依靠当地政府,加大投入,充分发挥各个职能部门的作用,全面吸引个人投资,拓宽保护资金的来源渠道,开辟出一条政府领导、齐抓共管、专群结合、群防群治的文物保护之路