全跨和半跨荷载组合下荷载效应函数模型研究  

RESEARCH ON LOAD EFFECT FUNCTION MODEL UNDER FULL-SPAN AND HALF-SPAN LOADING

作　　者：蒋友宝[1] 贺艺华[2] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410004 [2]长沙理工大学物理与电子科学学院,湖南长沙410004

出　　处：《工程力学》2011年第2期123-128,共6页Engineering Mechanics

基　　金：湖南省教育厅项目(08C108)

摘　　要：研究了全跨和半跨荷载组合下荷载效应函数的特性。首先分析了荷载效应函数为非线性的原因。然后在多个实例分析的基础上,提出了一个全跨和半跨荷载组合作用下荷载效应函数的一般模型。该模型无论是在构件层次上还是在体系层次上都具有较高的精度。最后根据此函数模型,讨论了荷载效应曲线的非线性程度。结果表明荷载效应曲线为抛物线或双曲线。这为结构可靠度计算提供了参考。The characteristics of load effect function are studied under full-span and half-span loading conditions.First,the reason for the nonlinear load effect function is discussed.Then a general model of load effect function is proposed through the ultimate load analysis of some examples under full-span and half-span loadings.It is indicated that the function model is accurate at both the structural member level and system level.Finally based on the approximate function model,the nonlinear degree of the load effect curve is discussed.The results show that the curve is a parabola or hyperbola.It provides some references on structural reliability calculation.

关 键 词：结构工程 荷载效应函数 数值拟合 全跨荷载 半跨荷载 非线性 极限承载能力 

分 类 号：TU312[建筑科学—结构工程]