本章主要介绍轴向荷载作用在构件截面重心时,构件的破 坏特征及强度计算、构造要求,并对螺旋箍筋构件的核心混 凝土强度分析及强度计算作详细介绍

第一节纯扭构件 5.1.1矩形截面纯扭构件的开裂扭矩 弹性材料(P92,5-5a):Tmax=2,(3.03≤≤4.79) 塑性材料:Tmaxyy2,(2.0≤y1≤3.0)

第一章钢筋混凝土结构的基本概念 第一节的概念 钢筋混凝土是由两种力学性能不同的材料一钢 筋和混凝土结合成整体,共同发挥作用的一种建 筑材料

概述 斜裂缝、剪跨比及斜截面受剪破坏形态 斜截面受剪破坏的主要影响因素 斜截面受剪承载力的计算公式与适用范围 斜截面受剪承载力计算方法和步骤 保证斜截面受弯承载力的构造措施

轴心受拉构件从加载到破坏,其受力过程分 为三个阶段:从加载到砼受拉开裂前,砼开裂后 到钢筋即将屈服,受拉钢筋开始屈服到全部受拉 钢筋达到屈服。 轴心受拉破坏时混凝土裂缝贯通,纵向拉钢筋达 到其受拉屈服强度,正截面承载力公式如下:

3.1.1结构上的作用 直接作用:荷载 间接作用:混凝土的收缩、温度变化、基础的差异沉降、地震等作用在结构上并使结构产生内力(如弯矩、剪力、轴向力、扭矩等)、变形、裂缝等作用称为作用效应或荷载效应

结构的功能要求与极限状态、作用与抗力、荷载与材料强度取值、结构的可靠度 一、结构的功能要求与极限状态 二、作用与抗力 三、荷载与材料强度取值 四、结构的可靠度

With a longitudinal axis of steel stirrups and the general failure mode of compression members, bearing capacity; Longitudinal and spiral reinforcement with stirrups failure modes of axial The concept of stability factor and its influencing factors; Analysis of the core concrete strength and strength calculation; Ordinary hoops column, spiral column reinforcement stirrup features and construction requirements

bias components are the mechanical characteristics of cross sections and two failure modes, Boundaries and determine the size of bias conditions; Familiar with eccentric compression of the second-order effect and calculation; Eccentric rectangular cross-section bearing capacity of compression members is calculated, Including the formula, the formula of the applicable conditions of reinforcement and non-symmetrical Design and reinforcement of the cross-section symmetrical cross section for review; I-shaped, T shaped eccentric compression AND CIVIL ENGINEERING Calculation method; Circular section eccentric compression member cross section design and review; Eccentric compression reinforcement of the structure and reasonable layout requirements

Computation of Stress, Crack width and Reflection of RC Flexural Members  Characteristics of use of reinforced concrete beam during the calculation.  The concept of transformed section and the geometric characteristics.  The stress state of reinforced concrete short-term checking.  Flexural members of the cracks and the maximum width of crack.  Deformation of flexural members.  Durability of concrete structures