抗动载部分预应力混凝土梁正截面强度计算  

CROSS SECTION STRENGTH CALCULATION OF PARTIAL BONDED PRESTRESSED CONCRETE BEAM ON DYNAMIC LOADING

作　　者：李凤霞[1,2] 李砚召[3] 

机构地区：[1]西安建筑科技大学,西安710055 [2]洛阳理工学院土木工程系,河南洛阳471023 [3]洛阳水利工程技术研究所,河南洛阳471023

出　　处：《建筑技术开发》2009年第2期6-8,共3页Building Technology Development

摘　　要：预应力度是衡量预应力混凝土构件延性的一个重要指标。首先引入了预应力度和构件名义预应力配筋截面面积概念,然后在考虑静载下预应力混凝土构件的相对受压区高度对延性的影响的基础上,从部分预应力混凝土梁平面弯曲的平衡条件出发,推导出预应力混凝土梁单筋正截面强度计算公式,并给出了设计步骤和设计算例。结果表明该方法简捷方便。Degree of prestress is one of important index which measures the ductility of prestress concrete members. In this paper degree prestress and nominal prestress reinforced cross section area are brought forward. At the same time, it is considered that height of relate compress zone in prestress concrete memebers affects ductility of members under dead loads. Based on the equilibrium of prestressed concrete beam in flat bent, cross section strength calculation formula of partial bonded prestressed concrete beam on dynamic loading was deduced and example of design was given.

关 键 词：部分预应力 混凝土梁 预应力度 强度计算 设计方法 

分 类 号：TU378.2[建筑科学—结构工程]