撑杆式预应力钢压杆最佳初始预拉力完备理论解  

PERFECT THEORETICAL EQUATION OF OPTIMUM INITIAL PRESTRESS OF STAYED STEEL COLUMN

作　　者：唐柏鉴[1] 朱晶晶[1] 

机构地区：[1]江苏科技大学土木工程系,镇江212003

出　　处：《工程力学》2011年第9期143-148,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(50948035);江苏省自然基金项目(BK2009723)

摘　　要：初始预拉力取值是撑杆式预应力钢压杆的关键技术。基于撑杆式预应力钢压杆一般力学模型,通过静力平衡方程,建立最佳初始预拉力与最大屈曲临界荷载关系式;基于预应力钢压杆完备屈曲形态函数,通过能量方程,建立最大屈曲临界荷载求解式;最终建立最优初始预拉力完备理论公式。进一步通过三个数值模型,变化拉索直径和撑杆长度,从数值试验上验证了上述理论公式的可靠性。Initial prestress value is the key parameter when designing stayed steel column. Based on general mechanical model of stayed steel column, static equilibrium equation was introduced, further the relationship between optimum initial prestress and maximum critical load was set up. Based on complete buckling mode function, the equation of maximum critical load was founded with energy method, thus perfect theory on optimum initial prestess was achieved. Finally numerical analysis based on three models was performed to verify the precision of the proposed theory.

关 键 词：结构工程 屈曲荷载 能量方程 预应力钢压杆 初始预拉力 形态函数 

分 类 号：TU323.2[建筑科学—结构工程]