[Tool]Grain size distribution curve [颗粒级配分布曲线]

Grain size distribution curve of soil [土的颗粒级配分布曲线]。To identify grain size characteristics of soils, grain size distribution curve is developed. First, sieve analysis is conducted. A variety of sieves with different openings are stacked, with the largest opening sieve on the top and smaller on the lower sections. When a relatively large percent passing through the sieve with 0.075mm opening (e.g., more than 10% as a guideline) is obtained from the sieve analysis, a hydrometer analysis is conducted. This program process the raw data from sieve analysis and hydrometer analysis to get the grain size distribution curve and other parameters like D10, D30, D50, D60, Cu and Cc. from 崔济东,崔济东的博客,www.jdcui.com, CJD, JidongCui

ETABS 2015人工波功能初步测试(二)

上一篇博文《 ETABS 2015人工波功能初步测试(一) 》初步测试了ETABS 2015中人工波功能,可以发现,ETABS2015在函数( function )模块增加的与指定反应谱匹配(Matched to Response Spectrum)的函数定义方法能生成与指定目标反应谱匹配的人工波。本节继续对生成的人工波特性做一下测试。峰值加速度(Peak Acceleration)和基线偏移特性(Baseline shift property)。from 崔济东,崔济东的博客,www.jdcui.com, CJD, JidongCui

ETABS 2015人工波功能初步测试(一)

ETABS 2015人工波功能初步测试。频域匹配(Spectral Matching in Frequency Domain)和 时域匹配(Spectral Matching in Time Domain)两种方法均能够获得与指定反应谱比较匹配的时程波。频域匹配(Spectral Matching in Frequency Domain)方法效率较高,但获得的地震波的反应谱与目标反应谱在短周期吻合效果不是特别好,时域匹配(Spectral Matching in Time Domain)计算量稍微大,获得的地震波的反应谱与目标反应谱在短周期吻合效果特别好。from 崔济东,崔济东的博客,www.jdcui.com, CJD, JidongCui

[Tool] Calculation of Concrete Damage and Plastic Deformation based on Chinese Code for Design of Concrete Structures [工具]基于中国规范的ABAQUS混凝土损伤与塑性变形计算软件

[Tool] Calculation of Concrete Damage and Plastic Deformation based on Chinese Code for Design of Concrete Structures [工具]基于中国规范的ABAQUS混凝土损伤与塑性变形计算软件。from 崔济东,崔济东的博客,www.jdcui.com, CJD, JidongCui

[Tool] OpenSees Fiber Section Viewer [工具][OpenSees纤维截面可视化工具]

OpenSees纤维截面可视化工具 (OpenSees Fiber Section Viewer)。程序基本功能是,解析OpenSees的.tcl文件,提取其中的纤维截面,显示具体的纤维截面剖分情况。OpenSees Fiber Section Viewer is a visualization program for fiber secion in OpenSees.编写这个程序的主要目的是,由于很多.tcl文件编写时,纤维截面的定义采用的是 OpenSees 提供的path和layer命令,这些命令容易编写却不方便查看,难以检查具体的纤维截面剖分是否正确。尤其是在阅读别人编写的 .tcl 文件时,由于编写命令的习惯不同,更加难以检查 纤维截面的定义是否合理。因此,如果有一个程序能将OpenSees的fiber、path和layer命令解析出来,并形成纤维图形直观显示,将大大提高初学者阅读和检查.tcl文件的效率,本博文提供的这个小程序很好的解决了这个问题。