摘要
针对双级无台阶加筋土结构上下层高度最优比值的确定,考虑筋材需用量对该结构稳定性与经济性的双重效应,以所需筋材总长度这一具体指标为目标函数,来构建设计的优化方案。通过算例,分析等效加筋土边坡坡角、填土内摩擦角及地震系数等对上下层高度最优比值的影响。结果发现:等效加筋土边坡坡角和填土内摩擦角对上下层高度的最优比值作用明显,因而在设计的优化过程中需特别关注这2个参数;水平地震荷载虽然对上下层高度最优比值有一定的作用,但考虑到地震发生及发生等级都存在较大的不确定性,因此建议在设计优化过程中,忽略地震荷载对该最优比值的影响。
The optimal ratio of upper and lower heights in two-stage stepless reinforced soil structures is determined by considering the dual effects of reinforcement requirements on the stability and economy of the structure.The total length of the required reinforcement is used as the objective function for constructing the design.Through case analysis,the effects of the equivalent reinforced soil slope angle,internal friction angle of the fill,and seismic coefficient on the optimal ratio of upper and lower heights are examined.The results show that the equivalent reinforced soil slope angle and the internal friction angle of the fill have significant impacts on the optimal height ratio,necessitating special attention to these parameters during design optimization.Although the horizontal seismic load has some influence on the optimal height ratio,its impact is recommended to be ignored in the design optimization process due to the considerable uncertainty in earthquake occurrence and magnitude.
作者
王宏威
罗玉珊
阮晓波
WANG Hongwei;LUO Yushan;RUAN Xiaobo(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;Shanghai Shen Yuan Geotechnical Engineering Co.,Ltd.,Shanghai 200031,China)
出处
《建筑施工》
2024年第11期1743-1747,共5页
Building Construction
基金
上海市启明星(B类)(21QB1404400)。
关键词
双级无台阶加筋土结构
筋材长度
筋材拉力
等效加筋土边坡坡角
填土内摩擦角
two-stage stepless reinforced soil structure
length of reinforcement
reinforcement tension
equivalent reinforced soil slope angle
internal friction angle
