Earthquake Engineering [地震工程] / ETABS & SAP2000 / Finite Element Method [有限元法] / Programming [编程] / Structural Engineering [结构工程]

SAP2000截面设计器中截面分析实例 [Sectional Analysis Example in SAP2000 Section Designer]

符东龙 师弟 整理的SAP2000截面分析资料 ！！！ 🙂 🙂 算例与博文《Sectional Modeling and Analysis Example of CAD to XTRACT Program [CAD to XTRACT 插件开洞截面建模与分析实例]》一致，以一个开洞截面为例，介绍在SAP2000上建模分析结构截面的过程包括弯矩曲率分析，PMM分析，还有一个十分具体的Step by Step过程。from 崔济东，崔济东的博客，www.jdcui.com, CJD, JidongCui

Geotechnical Engineering [岩土工程] / My Software [我的软件] / Programming [编程]

[下载][软件][土力学] 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

Earthquake Engineering [地震工程] / My Software [我的软件] / OpenSees / Programming [编程] / Structural Engineering [结构工程]

[Tool][工具][科研] OSFSV 2017: OpenSees Fiber Section Viewer [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。

My Software [我的软件] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Research [科研] / Structural Design [结构设计] / Structural Engineering [结构工程]

[软件应用][HLA][FAQ]滞回环分析程序 HLA 应用问题之 — Invalid Floating Point Operation

滞回环分析程序HLA应用问题之 — Invalid Floating Point Operation。许多网友在使用 本站 的滞回环分析程序（http://www.jdcui.com/?p=2216）时，都遇到过这样的一个问题 —— 无效浮点数操作错误（invalid floating point operation）。为此这篇博文主要讲一下一般是什么原因引起这个问题，怎么去做些处理，让程序可以进行滞回环的分析计算。以此帮助更多有需要的朋友。

Dynamics [动力学] / Earthquake Engineering [地震工程] / MATLAB / Programming [编程] / Structural Design [结构设计] / Structural Engineering [结构工程]

Tripartite Plot of Response Spectra [三联反应谱]

地震反应谱是结构抗震分析与设计中的重要工具。结构抗震设计中常用的反应谱主要包括位移谱Sd（Displacement Reponse Spectra）、伪加速度谱Spa（Pseudo-Acceleration Response Spectra）及伪速度谱Spv（Pseudo-Velocity Response Spectra）。当谱加速度为常数时，谱速度和周期之间呈线性关系，为沿45°斜直线方向；当谱位移为常数时，谱速度和周期之间呈线性关系，为沿-45°斜直线方向；利用上述关系，可以将位移谱Sd（Displacement Reponse Spectra）、伪加速度谱Spa（Pseudo-Acceleration Response Spectra）及伪速度谱Spv（Pseudo-Velocity Response Spectra）统一表述到4对数坐标系（Four-Way Logarithmic Graphs）中，相应的反应谱称为三联反应谱（Response Spectra Tripartite Plot）。

Dynamics [动力学] / Earthquake Engineering [地震工程] / Earthquake isolation and reduction [隔震减震] / Finite Element Method [有限元法] / My Software [我的软件] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[Tool][软件][动力学]NSDOF v2016: A Tool for Nonlinear Dynamic Analysis of SDOF System (NSDOF: 单自由度系统动力非线性分析工具)

SDOF是一个基于微软的windows窗口程序，用于单自由度结构的动力非线性分析。结构可是弹性也可以是弹塑性。动力荷载可以是施加在结构基座的地震加速度，也可以是施加在结构顶部的动力荷载。程序使用逐步积分法求解增量非线性运动方程。SDOF is a Microsoft Windows based application for the dynamic analysis of single degree of freedom structural systems. The structure may be modeled as elastic, elastic-plastic. The dynamic loading may be input as an earthquake accelerogram acting at the base of the structure, or as a dynamic force applied at the roof of the structure. The program uses a step-by-step method to solve the incrementally nonlinear equations of motion.

Earthquake Engineering [地震工程] / Finite Element Method [有限元法] / My Software [我的软件] / OpenSees / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Structural Engineering [结构工程]

[下载][Tool][软件] OSMatTest: OpenSees Material Test [OpenSees单轴材料测试工具]

[App]OpenSees Material Test.A small program to test the uniaxial materials in OpenSees.OpenSees Material Test将OpenSees ( Open System for Earthquake Engineering Simulation )中常用的单轴本构关系（钢及混凝土本构）提取出来，通过自行设计的界面进行测试，为今后更加深入的研究奠定基础。

My Software [我的软件] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Research [科研] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[加固改造] CAD2XTRACT 插件复杂嵌套截面建模实例(外包钢板加固改造案例)

CADtoXTRACT 插件复杂嵌套截面建模实例。许多第一次使用插件的用户不太知道如何入手建模，其中使用者提问得比较多的是对于复杂嵌套截面的建模问题。为此，这里以一个外包钢板加固型钢混凝土柱嵌套截面的XTRACT建模为例，对此类问题进行说明。对于其他嵌套截面的建模，用户可以参考照这个例子举一反三。

My Software [我的软件] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Structural Design [结构设计] / Structural Engineering [结构工程]

[软件][编程] CAD2XTRACT: XTRACT截面转换插件 [AutoCAD转任意截面到XTRACT]

CAD to XTRACT插件，其利用了AutoCAD强大的绘图功能，在工程师熟悉的AutoCAD上绘制好截面，然后转换成XTRACT模型。CADtoXTRACT插件结合AutoCAD的绘图功能，通过Shape和Rebar的不同组合可以十分方便的建立工程中常用的截面和形状复杂的异性开洞截面。Based on this consideration, I developed a AutoCAD plugin — CAD to XTRACT for rapid creating section , which is simple and powerful. You can draw the section in AutoCAD and used the CAD to XTRACT plugin to export the XTRACT files.

Civil Engineering Test [土木工程试验] / Earthquake Engineering [地震工程] / My Software [我的软件] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Research [科研] / Structural Engineering [结构工程]

[科研][Tool][软件][试验] HLA v2016: Hysteretic Loop Analysis Program [HLA: 滞回环分析工具]

Hysteretic Loop Analysis [滞回环分析]。构件的滞回曲线分析，获得滞回环面积、刚度退化参数、等效粘滞阻尼系数。适合于做构件抗震性能试验的同学。

SPECTR-1
Earthquake Engineering [地震工程] / My Software [我的软件] / Programming [编程] / Structural Engineering [结构工程]

[软件][工具] SPECTR: A program for Response Spectra Analysis [SPECTR地震波反应谱计算程序 v1.0]

地震反应谱是地震工程中重要的概念，我们经常需要将地震加速度时程转换为反应谱。SPECTR 是一个简单易用的反应谱计算程序。Seismic Response Spectra is an important concept in earthquake engineering, we often need to evaluate seismic response spectrum on the basis of a given time-acceleration record. SPECTR constitutes an easy way to evaluate Seismic Response Spectra, featuring a user-friendly visual interface.

My Software [我的软件] / Programming [编程] / Structural Design [结构设计] / Structural Engineering [结构工程]

[软件][混凝土][科研][工具]MCSR: Mander Confined Strength Ratio Calculator [MCSR: Mander混凝土本构约束强化系数]

Mander Confined Strength Ratio Calculator. Mander混凝土本构约束强化系数计算软件。上一篇博文《Mander Confined Concrete Model 资料整理》总结了Mander模型参数的计算方法，其中该模型十分关键的一个参数为约束混凝土的峰值强度fcc’。关于fcc’的确定，Mander模型原文（Ref. 1）给出的方法为：首先确定两个方向的约束系数，然后通过查图得到约束强度系数（Confined Strength Ratio），进而得到fcc’（博文《Mander Confined Concrete Model – Confined Strength Ratio [Mander混凝土本构约束强化系数]》也提到），不方便使用。