摘要
超静定结构中预应力的存在会引起结构次内力,本文对预应力杆单元进行了分析,提出通过直接计算等效结点荷载的方法来计算预应力对超静定结构所产生的次内力,根据虚功原理,引入杆单元的形函数,推导了能计算具有任意预应力筋曲线形状及沿预应力筋纵向具有任意分布的预应力所产生的杆端等效结点荷载的积分表达式。
Secondary internal force will occur in hyperstatic concrete structure when being pre-stressed. By andlysis for prestressed concrete structural element, a method to compute the secondary internal force due to prestressing in hyperstatic structure by directly calculating the equivalent node load has been suggested. According to the principle of fictitious work, a formula for calculating the equivalent node load due to prestressing with various initial shape of prestressing cable and with any distribution of prestress along the cable has been developed by using the shape function of a unit of structural element.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
1993年第2期35-40,共6页
Journal of Hefei University of Technology：Natural Science
关键词
超静定结构
预应力杆
次内力
Hyperstatic structure
prestressed concrete element
secondary internal force
Displacement method
Equivalent node load
