摘要
采用基于数字化摄影测量技术的试验方法,对不同长宽比（L/B）矩形基础地基的承载特性、位移场、应变场发展规律及破坏模式进行深入研究。研究结果表明：矩形基础地基极限承载力随着基础长宽比的增大而减小,并逐渐趋于稳定;L/B较小矩形基础地基最大剪应变沿基础长度方向形成贯通的应变泡,基础正下方弹性变形区呈三角形,地基呈整体破坏模式;L/B较大矩形基础地基沿基础长度方向最大剪应变局限于板边附近,未能形成贯通的应变泡,基础正下方弹性变形区呈倒梯形,地基沿基础长度方向呈局部破坏模式;不同长宽比矩形基础下地基沿着基础宽度方向呈整体破坏模式。
The bearing capacity characteristic,displacement field,strain field and failure mode of rectangular foundation with different length-width ratios were studied by the test method based on digital photogrammetry technique. The research results showed that ultimate bearing capacity of rectangular foundation decreased with the increase of length-width ratio and gradually turned to be stable. The maximum shear strain of rectangular foundation with smaller length-width ratio was developed into a continuous strain bubble under the plate,the elastic deformation zone along the length direction presented a triangle,and the rectangular foundation presented general shear failure.The maximum shear strain of rectangular foundation with large length-width ratio was limited near plate edges and failed to form a continuous strain bubble,the elastic deformation zone presented an inverted trapezoidal,and the rectangular foundation presented local shear failure. The rectangular foundations with different length-width ratios presented the general shear failure along the width direction.
出处
《工业建筑》
CSCD
北大核心
2018年第2期100-103,共4页
Industrial Construction
基金
国家自然科学基金资助项目(51408254)
江苏省自然科学基金项目(BK20130419)
关键词
基础工程
摄影测量
承载力
位移场
破坏模式
foundation engineering
photogrammetry
bearing capacity
displacement field
failure mode
