预应力结构小比例模型设计方法探讨  

Similitude Law for Small-scale Model of Pre-stressed Concrete Structures

作　　者：任祥香 卢文胜[2] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2014年第6期10-17,共8页Structural Engineers

基　　金：国家科技重大专项(2013ZX06005004-002-001)

摘　　要：以某预应力大悬挑混凝土框架-剪力墙结构为例,在现有结构模型相似理论的基础上,对预应力结构小比例模型设计方法进行了研究。该模型比例较小,同时满足模型整体结构和预应力构件的相似要求是对模型设计的较大挑战;提出基于"预应力作用效应"相似的设计方法,对结构悬挑部位的预应力构件进行相似设计,即用量纲分析法获得模型整体结构相似常数,进而推导预应力构件作用效应的相似方法,进行该结构小比例预应力构件设计。通过实例设计分析,证明该设计方法的合理性和有效性。Taking a large-span, cantilever pre-stressed structure as an example, the similitude law for its small-scaled model was studied based on the existed model experimental similitude theory. Generally, for the pre-stressed members, similarity expressions of the global structure are not compatible to the ones of the specif-ic local components. Therefore, the innovative similitude law and design procedures were proposed according to the cantilever pre-stressed structural behavior. Corresponding similitude constants were thus achieved. To verify the effectiveness and rationality of the aforementioned structures similitude law, the design of a small-scaled model of a pre-stressed concrete structure were accomplished and evaluated.

关 键 词：预应力结构 小比例模型 相似设计方法 结构效应 

分 类 号：TU398.2[建筑科学—结构工程] TU205