摘要
温度变化对基坑支护系统受力和变形的影响受到越来越多的人的重视。为改进基坑支护系统中温度应力的计算方法,基于Winkler地基梁模型,采用弹性抗力法,提出等效弹簧刚度的概念,并推导了由于温度升高引起的支撑轴力和水平位移的计算公式,并且把计算结果和前人进行了对比。结果表明:与迭代法相比,省去了迭代过程,计算量大大减少,可用于估算实际工程中由于温度升高引起的水平支撑的温度应力和水平位移。
The influence of temperature change on the stress and deformation of support system of foundation pits attracts more and more people's attention. Based on the Winkler foundation model and the elastic resistance method, the equivalent spring stiffness is proposed to improve the method for calculating the temperature stress in the horizontal strut of a foundation pit. A formula for calculating the change of axial force and horizontal displacement of strut due to temperature change is derived. Compared with the pre-method, the proposed method is simpler. Besides, it can also be used to estimate the change of axial force and horizontal displacement of strut due to temperature rise.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2015年第S1期61-64,共4页
Chinese Journal of Geotechnical Engineering
基金
国家重点基础研究发展计划("973"计划)资助项目(2010CB732106)
国家自然科学基金项目(51108312)
关键词
基坑支护结构
水平支撑
温度应力
水平位移
pit-retaining structure
horizontal strut
temperature stress
horizontal displacement
