南昌市2010年规划中心城区建筑密度遥感研究   总被引：2，自引：0，他引：2  

林子瑜  唐清连  徐金山 《华东地质学院学报》2002,25(1):27-31,T001

论述了南昌市建筑密度调查的技术方法，阐明了城市建筑密度的现状分布和分区，分析了建筑密度对 城市发展的影响，探讨了城市规划中存在的问题和对策。  相似文献   

建筑物震害及其抗震设计的初步研究--以姚安6.5级地震震区建筑物破坏为例     

樊跃新  非明伦  崔建文  包一峰 《地震研究》2002,25(4):391-397

对2000年1月15日姚安6．5级地震极震区（Ⅷ度）及姚安、大姚、南华和牟定等县城内的建筑物与结构物的震害做了系统的调研。本作为系列研究之二，分析了各类建筑物的地震破坏现象与相关设计，以及地震的破坏机理，讨论了地震区城镇建设中防震减灾应引起重视的有关问题；提出了在设计与施工中出现的若干问题及在这次地震灾害中获取的经验与教训。对今后多震区的城市规划、建筑物设计有一定的参考价值。  相似文献   

单层钢筋混凝土柱厂房的抗震鉴定和可靠性评定实例     

任锡泰  何钧  冯志泽 《华北地震科学》2002,20(1):49-53

对一大型老旧工业厂房，在依据《建筑抗震鉴定标准》（GB50023－95）进行抗震鉴定的基础上，进一步用《工业厂房可靠性鉴定标准》（GBJ144－90）进行了可靠性评定，提出抗震性能鉴定结果和建议，供同类工作参考。  相似文献   

Investigation of earthquake mechanisms and their impact on certain basic concepts in earthquake engineering and seismology     

Fulu Men 《地震工程与工程振动(英文版)》2002,1(2):281-291

In this paper, mantle circulation flow, continental drift, earthquake origin and other mechanical principles are examined as they apply to earthquake engineering, seismology and dynamics of fluid saturated porous medium. The relationship of mantle flow to earthquakes is examined and clarified, and a new model, different from Haskell’s, is proposed for the earthquake mechanism. The proposed new model is based on the discovery that two pairs of jump stress and jump velocity will start to act from the fault plane. Records obtained directly from recent earthquakes nearby and right on the fault break show a very large velocity impulse, which verify, indirectly, the new mechanism proposed by the author. Further, at least two physical parameters that characterize the seismic intensity must be specified, because according to the discontinuous (jump) wave theory, at the earthquake source, the stress jump and the velocity jump of particle motion should act simultaneously when a sudden break occurs. The third key parameter is shown to be the break (fracture) propagation speed together with the break plane area. This parameter influences the form of the unloading time function at the source. The maximum seismic stress in and displacement of a building are estimated for two unfavorable combinations of the building and its base ground in terms of their relative rigidity. Finally, it is shown that Biot’s theory of wave propagation in fluid saturated porous media is valid only when fluid flow cannot occur.  相似文献   

Bulk transfer coefficients of the atmospheric momentum and sensible heat over desert and Gobi in arid climate region of Northwest China   总被引：4，自引：0，他引：4  

张强  卫国安  黄荣辉  曹晓彦 《中国科学D辑(英文版)》2002,45(5):468-480

By utilizing the data of the intensive observation period (May-June, 2000) of Dunhuang land-surface process field experiment that belongs to "Land-atmosphere Interactive Field Experiment over Arid Region of Northwest China", the bulk momentum transfer coefficient Cd and bulk sensible heat transfer coefficient Ch between surface and atmosphere over desert and Gobi in the arid region are determined according to three different methods. The result shows that, though these bulk transfer coefficients are different, they are in the same order. Especially, the means of Cd and Ch are close. Moreover, through analyzing the wind direction, the interference of the building near the observational station with the data is eliminated. From this, the relation between the bulk transfer coefficients and the bulk Richardson number and the range of the typical values of the bulk transfer coefficients over desert and Gobi in the typical arid region are obtained.  相似文献   

高层建筑风振监测的实践与初步分析     

姜晨光  盖玉松  丁杰东  于绍峰  吕国栋 《四川测绘》2002,25(3):126-129

叙述了高层建筑风振监测的基本方法及监测过程，以大量的实际监测数据为基础，初步总结出了高层建筑的风振规律。  相似文献   

Numerical Modelling of the Turbulent Flow Developing Within and Over a 3-D Building Array, Part I: A High-Resolution Reynolds-Averaged Navier—Stokes Approach     

Fue-Sang Lien  Eugene Yee 《Boundary-Layer Meteorology》2004,112(3):427-466

A study of the neutrally-stratified flow within and over an array of three-dimensional buildings (cubes) was undertaken using simple Reynolds-averaged Navier—Stokes (RANS) flow models. These models consist of a general solution of the ensemble-averaged, steady-state, three-dimensional Navier—Stokes equations, where the k-ε turbulence model (k is turbulence kinetic energy and ε is viscous dissipation rate) has been used to close the system of equations. Two turbulence closure models were tested, namely, the standard and Kato—Launder k-ε models. The latter model is a modified k-ε model designed specifically to overcome the stagnation point anomaly in flows past a bluff body where the standard k-ε model overpredicts the production of turbulence kinetic energy near the stagnation point. Results of a detailed comparison between a wind-tunnel experiment and the RANS flow model predictions are presented. More specifically, vertical profiles of the predicted mean streamwise velocity, mean vertical velocity, and turbulence kinetic energy at a number of streamwise locations that extend from the impingement zone upstream of the array, through the array interior, to the exit region downstream of the array are presented and compared to those measured in the wind-tunnel experiment. Generally, the numerical predictions show good agreement for the mean flow velocities. The turbulence kinetic energy was underestimated by the two different closure models. After validation, the results of the high-resolution RANS flow model predictions were used to diagnose the dispersive stress, within and above the building array. The importance of dispersive stresses, which arise from point-to-point variations in the mean flow field, relative to the spatially-averaged Reynolds stresses are assessed for the building array.  相似文献   

挤扩支盘桩在地下建筑抗浮设计中的应用   总被引：2，自引：3，他引：2  

方崇  张信贵  闭历平 《岩土工程技术》2005,19(6):281-283,310

对目前地下建筑的各种抗浮措施进行了分析,根据挤扩支盘桩的受力特征,提出了采用挤扩支盘桩作为抗浮桩的新思路,给出了挤扩支盘桩单桩承载力的计算公式和构造要求,阐述了该方法的施工要点,并结合工程实例进行了技术经济分析。工程实践表明,采用挤扩支盘桩解决地下建筑抗浮问题是一种比较经济、合理的新方法。  相似文献   

对现代化医院建筑设计的几点认识与思考   总被引：3，自引：0，他引：3  

李则昂 《中国勘察设计》2005,(8):11-14

本文结合实际建成的医院范例简要介绍了国内外现代化医院建筑设计的过程及特点,论述了设计过程与方法在医院建筑设计中的重要性。从设计前期、总体规划设计、单体设计几个阶段的设计工作方法、需要解决哪些问题等几方面阐述了作者的认识与观点。  相似文献   

超高层建筑采用复合地基和浅基础的设计与施工     

庞伟明 《探矿工程》2005,32(9):1-5

广州市淘金家园二期B5-4~7栋超高层建筑工程地下室底部置于全风化与强风化的泥质粉砂岩上，按地基土压板试验情况，设计采用天然地基与复合地基上的浅基础。由于该工程的试验、设计与施工紧密配合，施工措施可靠，成为广州市超高层建筑采用复合地基和浅基础的成功实例。介绍其试验情况、设计思路、施工要点和实施效果。  相似文献