城市勘测
城市勘測
성시감측
URBAN GEOTECHNICAL INVESTIGATION & SURVEYING
2012年
4期
173-176
,共4页
基坑支护%支撑体系%支点刚度系数%迭代算法%非对称荷载
基坑支護%支撐體繫%支點剛度繫數%迭代算法%非對稱荷載
기갱지호%지탱체계%지점강도계수%질대산법%비대칭하재
Relaining and proleeting for foundation excavation%bracing system%stiffness coefficient of fulcurm hearing%iterated algorithm%asymmetric load
规范推荐的基坑支撑体系的水平刚度系数计算前提之一是基坑两侧荷载对称,基坑内支撑结构在两侧非对称荷载下,其水平刚度系数和结构内力、变形均与对称荷载条件下不同。支撑结构在两侧不对称荷载下将产生附加变形,从而引起内力重分布,最终达到受力平衡。本文分析基坑的支撑体系在非对称荷载条件下的变形特征,采用迭代计算得到内支撑结构的刚度,并进而求解出基坑支护的内力及变形,并对计算结果进行了讨论,其计算结果与按对称荷载的计算相比更显合理。
規範推薦的基坑支撐體繫的水平剛度繫數計算前提之一是基坑兩側荷載對稱,基坑內支撐結構在兩側非對稱荷載下,其水平剛度繫數和結構內力、變形均與對稱荷載條件下不同。支撐結構在兩側不對稱荷載下將產生附加變形,從而引起內力重分佈,最終達到受力平衡。本文分析基坑的支撐體繫在非對稱荷載條件下的變形特徵,採用迭代計算得到內支撐結構的剛度,併進而求解齣基坑支護的內力及變形,併對計算結果進行瞭討論,其計算結果與按對稱荷載的計算相比更顯閤理。
규범추천적기갱지탱체계적수평강도계수계산전제지일시기갱량측하재대칭,기갱내지탱결구재량측비대칭하재하,기수평강도계수화결구내력、변형균여대칭하재조건하불동。지탱결구재량측불대칭하재하장산생부가변형,종이인기내력중분포,최종체도수력평형。본문분석기갱적지탱체계재비대칭하재조건하적변형특정,채용질대계산득도내지탱결구적강도,병진이구해출기갱지호적내력급변형,병대계산결과진행료토론,기계산결과여안대칭하재적계산상비경현합리。
Synunelrieal load was one of the premises in the stiffness ealculalion of bracing strueture in deep excavation in the technical specification, h was difference for the bracing structure with Ihe internzd three and the deiormation under the asymmetric load for tire stiffness coefficient of fulcurm bearing was changed. The bracing structure will deform under tire asymmetrie load,caused the inlernal force varied and lead to force balanced. The characteristic of deformation in tire bracing structure was analysis; iterated algorithm was adupted to solve the stiffness,the internal force and the deformation. The result was discussed and it was more reasonable,compare with the result under the symmetric load.
