卸载动效应分析思路及其在土木工程中的应用  

ANALYTIC APPROACH FOR DYNAMIC EFFECT OF UNLOADING AND ITS APPLICATION IN CIVIL ENGINEERING

作　　者：黄庆丰[1] 王大富[1] 

机构地区：[1]华侨大学土木工程学院,福建泉州362021

出　　处：《建筑技术》2010年第1期79-83,共5页Architecture Technology

基　　金：国家自然科学基金资助(10872072);华侨大学科研基金项目(05B0013)

摘　　要：根据卸载作用的特点,提出了结构动力响应计算的卸载动效应分析思路,该思路采用补充方程描述结构的计算状态与实际状态偏移量,并通过消除计算状态的偏移量提高计算精度和稳定性。列举该思路在开挖工程施工技术、小扰动效应分析、结构弹塑性动力响应时程分析及变结构体系运动稳定性分析等方面的应用实例。该分析思路计算过程较为简便和灵活,某种意义上说是结构稳定性基本概念在开挖工程施工、结构振动控制和计算分析等领域的推广和应用。In this paper, according to the characteristic of unloading action, a method which is called the analytic approach for dynamic effect of Unloading is summarized for the calculating of dynamic response of structure. This method establishes a supplementary equation to describe the excursion between the calculating movement state and the actual movement state of structure, and by eliminating the excursion to improve the calculating precision and stability. Several application has been introduced, includes optimizing technique for excavation of deep channel or pit, the analysis of small perturbation effect, the elasto-plastic time-history analysis of dynamic response for structure and the analysis of movement stability of variable structure. The computation process is convenient, some kinds of significance, it is an extending and application of the conception of the structural stability in the area of civil engneering.

关 键 词：卸载作用 能量分布 计算扰动量 计算稳定性 

分 类 号：TU311.3[建筑科学—结构工程]