地域性区段建筑空间环境的有机再生技术研究

地域性区段的建筑空间环境是时间和空间共同作用下的有机整体,由于种种机缘,这个整体可能在一定阶段会受到破坏和损伤,需要修复。本文认为修复和再生的合理技术方式必然是有机的,有机再生技术是修复地域性区段建筑空间环境的有效方法。以此为前提,提出了地域性区段建筑空间环境有机再生技术路径,并基于格式塔心理学、建筑类型学等,做了理论及案例解析,提出二元耦合设计方法及要素解构重组方法等可操作性较强的设计方法。以期从更为理性的角度,去解决地域性区段的建筑空间环境的修复问题。     

基于剩余使用年限的结构生命周期性能设计方法

基于概率理论结构设计的基本目的是使结构在预定的使用期内满足设计所预期的结构可靠性,包括安全性、适用性、耐久性。影响结构可靠性的荷载效应(直接或间接作用引起的结构的各种内力)与结构抗力(指结构承受荷载和变形的能力)因受到各种因素的影响,都是随时间或空间而变动的随机函数。在目前的超高层建筑结构的设计过程中,有关是否需要考虑作用及抗力的时变性能以及如何考虑的规定十分笼统。为了更加明确考虑时变性能在结构设计中的影响,在引入剩余使用年限的基础上提出了基于剩余使用年限的结构生命周期性能设计方法。并以一个超高层建筑为例,阐述了其具体应用,为今后工程中基于时变性能的结构设计提供参考。     

Flow Behavior of SUS304 Stainless Steel Under a Wide Range of Forming Temperatures and Strain Rates

To determine the flow behavior of SUS304 stainless steel under different conditions, axisymmetric compression tests were conducted over a wide range of forming temperatures (25 °C to 400 °C) and strain rates (10⁻³ to 10 s⁻¹). Flow curves were obtained for different forming conditions to study the influence of the forming temperature and strain rate on the flow behavior. Moreover, electron backscatter diffraction analysis, X-ray diffraction analysis, transmission electron microscopy, and Feritscope were used to study the microstructure evolution of SUS304 stainless steel under different conditions for determining the underlying reasons for the variations in flow behavior. The experimental results indicated that the flow stress decreased with increasing the forming temperature. With increasing strain rate at 25 °C to 200 °C, the flow stress first increased and then decreased; however, the strain rate had little effect on the flow stress at 300 °C and 400 °C. By analyzing the variation in the phase transformation inside compressed SUS304 stainless steel samples under different forming conditions, the key factors affecting the flow behavior of stainless steel were identified. Finally, by examining the variation in the martensite content and the dislocation density, the dominant deformation mechanism under different forming conditions was determined.

     

数据融合技术在变压器状态评估中的应用

电力变压器是电力系统及变电站的最至关重要的设备之一。对电力系统进行运行维护时,监测并预报变压器运行状态并且能够有效地监测并判断变压器的故障情况具有非常现实的意义。基于设备状态信息融合技术,分析了D-S证据理论的基本原理、组合规则和决策过程。通过具体的实例论述了诊断方法的具体可行性,比较了单一诊断方法(只经神经网络判断的结果)与信息融合技术的正确率,并指出信息融合技术的发展优势和可实现性。     

考虑刚体稳定性约束条件的变形监测数据处理方法研究

在各种变形监测工程中,部分监测对象可以假设成为刚体进行处理,而刚体的稳定性始终没有被引入到变形监测数据处理中。本文旨在讨论变形监测数据处理时,如何引入刚体的稳定性,并获取整体位移信息。     

株洲市中心医院的结构设计

较详细地介绍了株洲市中心医院结构的设计过程,包括基础选型,超长地下室,钢结构屋盖设计,以及医疗设备用房相关的荷载取值,防辐射,直线加速器室,高压氧舱的设计要点等,相关设计方法可供同类项目参考。     

The impact of property price on construction output

The interaction between the construction market and the overall economy has attracted much attention, but few studies have investigated the influence of the property market on the construction market in terms of property price. The disaggregated data of Hong Kong’s housing and retail construction sectors are collected to investigate the impact of property price on construction output. The newly developed autoregressive distributed lag (ARDL) bounds testing approach and the error correction (EC)-based Granger causality test are employed. The bounds testing results suggest that there exist stable long-run relationships between construction output and property price for both housing and retail construction sectors. Specifically, a 1.00% increase in the housing price and retail price lead to a 0.55% and 0.42% increase in construction outputs for the two sectors respectively. In addition, the Granger causality tests confirm a distinct long-run causal flow from property price to construction output. Furthermore, the proposed ARDL approach provides an effective method for forecasting construction output.     

保障性住房的公共服务体系建构

通过对保障性住房目标人群的居住需求分析归纳出:居住需求可根据时间分为“永久性”与“非永久性”;居住空间可根据功能分考“核心”与非核心”功能空间:基于预期需求的住宅产品价值消费具有被动性特点.在此基础上,结合我国保障性住房建设的约束性条件,提出若干保障性住房的公共服务功能建设构想.     

高层建筑基本平面形式及布局对城市总体通风的影响研究

该文从平面的视角出发,对高层建筑基本平面形式选择、总平面布局对城市风环境带来的影响进行分析.高层建筑的不同基本平面形式,以及总平面布局中朝向、尺度、外部空间等方面的不同设计决策,对城市总体通风的影响有显著差异.根据定性分析,以及PHOENICS流体动力学软件的模拟结果,总结高层建筑设计中需要考虑的平面选型和布局策略,以保证城市风道畅通,提高城市总体通风效率.     

海南岛高速公路一般互通立交选型研究

通过对海南岛高速公路已建成的60座一般互通立交的分析,阐述了菱形立交、部分苜蓿叶形立交及单喇叭立交在不收费高速公路中的设置特点,并对其优缺点进行了比较,提出了选择四肢交叉形式,且最优立交形式为菱形立交或半苜蓿叶形立交的选型思路,并通过设计实例,阐述了该选型思路的运用技术。