斜截面抗剪强度的计算和最小配箍率的变化

钢筋混凝土结构设计规范从20世纪70年代初到现在,已经作了三次大的调整和修改。这里分别对三本钢筋混凝土结构设计规范的受弯构件斜截面抗剪强度的计算公式和最小配箍率的变化进行分析比较。每一次钢筋混凝土结构设计规范的修订,都更加符合国内钢筋混凝土的发展。     

盛夏话荷花

荷花以其清新、素洁,被认为是报身佛所居之"净土"。所以,佛教佛祖释迦牟尼、观世音菩萨的法相均坐于莲(荷)花之上。李时珍     

从信义大厦临街立面改造看高层烂尾楼问题

近年来,越来越多的烂尾楼改造工程受到重视,很多成功的经验表明,烂尾楼的再生利用可以取得显著的经济效益和社会效益。本文以重庆市渝中区朝天门地区信义大厦临街立面改造为例,分析烂尾楼改造的各种相关问题。     

Postbuckling and imperfection sensitivity analysis of structures in the plastic range. Part 1: Model analysis

In this paper, two simple models which complement one another in mirroring the plastic buckling properties of structures are analysed in detail to introduce a scheme for postbuckling and imperfection sensitivity analysis that is suitable for tackling real structures.

The variation of the size of the unloading area is used as the perturbation parameter and a special perturbation scheme is designed to deal with the moving boundary problems caused by plastic unloading, so that the extension of Koiter's theory of initial elastic postbuckling to the plastic range becomes possible.     

On the shear strength of reinforced concrete deep beam with web opening

An objective of this study is to establish the shear strength of reinforced concrete deep beam with web opening. Eighteen beams were tested with the variables of the steel ratio and strength of longitudinal bars, concrete strength, and shear span‐to‐depth ratio. It was observed that the opening is strengthened by longitudinal bars but the load‐carrying capacity of deep beams with openings can be largely improved by the increase in concrete strength. Modifying the softened truss model derived by Mau and Hsu and utilizing the results of this experiment carried out with the variables of concrete strength, cross‐section size, shear‐span‐to‐depth ratio, and the strength and steel ratio of longitudinal bars, this study proposes an improved model to predict the shear strength. Copyright © 2006 John Wiley & Sons, Ltd.     

浅议塑造建筑企业文化的途径

从国企企业文化建设中存在的问题入手 ,讨论了建筑企业塑造企业文化的重要性和有效途径 ,提出通过营造企业人气 ,建造一体化工作格局和重视创新观念等方式塑造企业文化的观点     

延续历史重整风貌--中英街沿街建筑改造设计简介

文章立足于中英街部分建筑的改造,分析了特殊历史地位和特殊地域的旧街道改造时所面临的问题和挑战.     

三轴深层搅拌桩止水帷幕在某基坑支护工程的应用

文章以某大楼基坑支护工程为例,主要介绍了三轴深层搅拌桩的施工工艺及质量保证措施,供类似工程参考。     

GTC——45型拆除机器人

介绍了GTC-45型拆除机器人的整机结构及技术性能，分析了GTC-45拆除机器人控制系统的工作原理、电气控制系统和无线遥控系统特点。由于采用遥控摄像无线数字视频红外监测系统及有线／无线遥控操作、负载反馈电液比例式驱动以及先进的破碎拆除工具，GTC-45型机器人与常规的拆除设备相比具有技术上的优势，具有良好的应用前景。     

高强粉煤灰砂浆的试验研究及分析

本文通过对掺入粉煤灰的高强水泥砂浆、高强石灰水泥砂浆与基准砂浆的对比试验,分析了粉煤灰对砂浆性能的影响。并在试验基础上,提出了较为合理的掺粉煤灰的水泥砂浆、石灰水泥砂浆的配比。