超长混凝土框架裂缝控制计算关键技术  

Key technique of ultra-long concrete frame crack control calculation

作　　者：焦彬如[1] 杨军[2] 郭昌生[1] 李水明 

机构地区：[1]浙江大学宁波理工学院,浙江宁波315100 [2]杭州市城建设计研究院,浙江杭州310024 [3]宁波建工集团有限公司,浙江宁波315040

出　　处：《浙江大学学报（工学版）》2010年第10期2036-2040,共5页Journal of Zhejiang University：Engineering Science

基　　金：宁波市科技资助项目(2008C50015)

摘　　要：为了有效实现超长混凝土框架裂缝控制,研究超长混凝土框架结构在季节温差变形和自身收缩变形下弹塑性简便快捷的计算原理和方法.研究表明,计算中必须充分利用混凝土结构所具有的弹塑性性质;使在综合计算温差(包括季节温差和混凝土总收缩变形转化得到的当量计算温差之和)作用下产生的弹塑性附加作用力计算尽可能地简便快捷,并严格控制综合计算温差的总量;需要充分考虑季节温差应予遵循的3种影响因素和降低混凝土收缩值的3项技术措施的合理应用,使综合计算温差得到控制.A faster and easier calculation principle and method of the elastic-plasticity of ultra-long reinforced concrete frame under the deformation of seasonal temperature difference and self shrinkage was analyzed in order to effectively achieve the ultra-long reinforced concrete frame crack control. Results show that the calculation should fully use the elastic-plasticity feature of concrete structure, the calculation of elastic-plasticity additional acting force generating from the comprehensive calculation of temperature difference （including the addition of seasonal difference calculation and the equivalent of temperature difference calculation derived from the transformation of the contraction deformation of concrete） becomes easier and faster as far as possible, and the total volume of the comprehensive calculation of temperature difference should be strictly confined. Three influencing factors that temperature difference should follow and the rational use of three technique measures which can lower the concrete shrinkage values should be considered. Then the temperature difference of comprehensive calculation can he controlled.

关 键 词：超长混凝土框架 附加作用力 弹塑性计算 综合计算温差 截面设计 

分 类 号：TU375.4[建筑科学—结构工程]