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By using the mathematical method of curve integrals,it derives the mathematical formula to calculate the cross-section ductile coefficient of RC ring section member.

从钢筋混凝土正截面承载力计算时的基本假定出发,建立了环形截面上各种应力图形的函数表达式,利用曲线积分的数学方法,推导出计算钢筋混凝土环形截面构件截面延性系数的数学公式。

Ferroconcrete circle form is the main pressure pipelines type mostly adopted in built power stations from 1970"s to 1980"s in our country. During long running process, there are many factors such as design faults, bad materials, manufacturing deficiencies, improper constructions, environment factors, function changed, load increase, material aging, damage and so on which lead to all kinds of problems containing deficiency, crack, lack of strength and structure destroyed .

在我国七八十年代建成的电站压力管道,大多采用的是钢筋混凝土圆形结构,在长期运行过程中由于其设计失误、材质恶劣、制作偏差、施工不当、环境因素、功能改变和荷载增加等因素及材质本身的老化、损害等而导致钢筋混凝土压力管道产生各种各样的缺陷、损伤、裂缝过大、承载力不足或结构破坏等问题。

According to the fractional derivative model of viscoelastic damper and force-deformation-slip relation of friction element,a precise finite element model of FVD is constructed,and the method for forming element stiffness matrix and control force vector of FVD is deduced.

针对粘弹性材料的分数导数模型和摩擦单元的力-位移-滑移量的矩阵关系式,建立了FVD精确的有限元模型,推导了FVD单元刚度矩阵和控制力向量计算公式和求解方法;根据钢筋混凝土框架结构的非线性特性,建立了设置FVD非线性钢筋混凝土框架结构地震反应时程分析的控制方法。

The whole process of moment-curvature relationship for RC beam was analyzed with the relative depth of compressive zone of the beam about 0.15 using the strip integral method and computer programme. The relationships between moment and strain of concrete, strain of steel, depth of compressive zone were got.

采用条带积分法,应用计算机编程,对相对受压区高度为0.15左右的钢筋混凝土梁的弯矩-曲率关系进行全过程分析,得出弯矩-曲率关系曲线,并给出弯矩与混凝土应变、钢筋应变及梁的相对受压区高度的对应关系。

The material about damage to structures of Chi-Chi earthquake is collected and based on it the isoseismal is plotted using the method of mean damage index.(2) Three kinds of structures as for masonry structures, RC frames and RC shear wall frames are chosen for their generally popularization.

2选取了量大面广,且震害资料丰富的砌体、钢筋混凝土框架和钢筋混凝土框架剪力墙三类结构,计算了它们在多种地震动作用下的地震损伤,并研究了这三类结构的损伤与地震动幅值、频率、持时和能量特性等15个地震动参数之间的关系,以确定地震动参数与结构损伤之间的相关性,进而探求地震动的破坏势。

First, the modal perturbation method based on Ritz vectors is applied to solve the dynamic characteristics of Timoshenko deep beam including the effects of shear deformation and rotational inertia.

首先建立了钢筋混凝土深梁的求解方程,然后提出了求解Timoshenko梁特征值问题的模态摄动法,最后通过算例,说明不同含钢率下钢筋混凝土深梁的自振特性的变化情况。

Performance of corroding reinforced concrete structures has been studied home and abroad recently.

本文简介了这方面研究的现状,其中包括研究的方法、受腐蚀钢筋混凝土结构的抗弯性能、抗剪性能、钢筋和混凝土的粘结性能、使用荷载作用下的性能和动力性能,并对需要重点加强研究的方面提出了建议。

In order to meet the current rapid development of the construction industry, reinforced concrete structure of the growing number of situations, to meet the requirements of a large number of steel connections, my company and the Beijing Architecture Design and Research Institute of the success of research and development with international and domestic advanced level reinforced rib peeling rolling straight thread forming series of mechanical and connecting sleeve, bar straight screw connection technology has the following characteristics: 1, on the neutral good, stable performance, high joint strength.

为适应当前建筑业的迅速发展,钢筋混凝土结构日益增多的形势,满足大量钢筋连接的要求,我公司与北京建筑设计研究院成功研制、开发了具有国际国内先进水平的钢筋剥肋滚轧直螺纹成型系列机械和连接套筒,钢筋直螺纹连接技术具有以下特点: 1、对中性好、性能稳定、接头强度高。

Also, triple-line skeleton curve was obtained, which provide base for analyzing this kind of shear walls.

其次通7片纵横配筋的高强砌块配筋砌体高悬臂剪力墙的恢复力试验,考查了竖向荷载、剪跨比、水平配筋对该种剪力墙破坏形态的影响,以及该种墙片的强度、刚度、延性性能及能量耗散能力,并且与钢筋混凝土剪力墙相比较,得出配筋砌体剪力墙抗剪时与钢筋混凝土剪力墙的破坏形态、延性等相近的结论,由试验得出的骨架三折线,也为今后分析该种墙体的抗震性能提供了依据。

Based on equilibrium equations and stress strain relationships, an effective theory and computational method for the analysis of RC beams strengthened with FRP plates are presented.

该文基于钢筋混凝土结构设计理论中的截面平衡方程和应力应变关系,为 FRP板加固的钢筋混凝土梁的计算提供了行之有效的理论和方法。

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