水利水电科技进展
水利水電科技進展
수이수전과기진전
ADVANCES IN SCIENCE AND TECHNOLOGY OF WATER RESOURCES
2014年
2期
31-35
,共5页
应力图形法%非杆件体系结构%配筋计算%钢筋混凝土%有限元法
應力圖形法%非桿件體繫結構%配觔計算%鋼觔混凝土%有限元法
응력도형법%비간건체계결구%배근계산%강근혼응토%유한원법
stress graphic method%non-member concrete structure%reinforcement calculation%reinforced concrete%finite element method
介绍了水工混凝土结构设计规范中应力图形法的演变过程,对比分析了4种规范配筋计算公式的差异,以承载板、泄洪深孔、升船机上闸首等实际工程为例计算配筋量。计算结果表明：应将SL 191-2008中允许混凝土承担的拉力不宜超过总拉力的30%修正为15%；SL 191-2008修正后,SDJ 20-1978计算的配筋量最大,SL 191-2008居中,DL/T 5057-2009最小；当承载板、泄洪深孔和升船机上闸首结构按平面问题计算时,DL/T 5057-2009和DL/T 5057-1996计算的配筋量相近,最大仅相差4.1%；计算应力场未考虑温度作用时,通常混凝土承担的拉力取零,通过增加配筋量限制裂缝宽度。
介紹瞭水工混凝土結構設計規範中應力圖形法的縯變過程,對比分析瞭4種規範配觔計算公式的差異,以承載闆、洩洪深孔、升船機上閘首等實際工程為例計算配觔量。計算結果錶明：應將SL 191-2008中允許混凝土承擔的拉力不宜超過總拉力的30%脩正為15%；SL 191-2008脩正後,SDJ 20-1978計算的配觔量最大,SL 191-2008居中,DL/T 5057-2009最小；噹承載闆、洩洪深孔和升船機上閘首結構按平麵問題計算時,DL/T 5057-2009和DL/T 5057-1996計算的配觔量相近,最大僅相差4.1%；計算應力場未攷慮溫度作用時,通常混凝土承擔的拉力取零,通過增加配觔量限製裂縫寬度。
개소료수공혼응토결구설계규범중응력도형법적연변과정,대비분석료4충규범배근계산공식적차이,이승재판、설홍심공、승선궤상갑수등실제공정위례계산배근량。계산결과표명：응장SL 191-2008중윤허혼응토승담적랍력불의초과총랍력적30%수정위15%；SL 191-2008수정후,SDJ 20-1978계산적배근량최대,SL 191-2008거중,DL/T 5057-2009최소；당승재판、설홍심공화승선궤상갑수결구안평면문제계산시,DL/T 5057-2009화DL/T 5057-1996계산적배근량상근,최대부상차4.1%；계산응력장미고필온도작용시,통상혼응토승담적랍력취령,통과증가배근량한제렬봉관도。
The evolution of the stress graphic method in four kinds of design codes for hydraulic concrete structures is introduced, and the reinforcement calculation formulas in different codes are compared and analyzed in this paper. Reinforcement calculation was conducted in practical engineering projects, including a bearing plate, a flood-discharging deep orifice, and the upper lock head of a ship lift. The calculation results are as follows:In the code SL 191-2008, it is recommended that the maximum proportion of the tensile force that the concrete can bear to the total tensile force be less than 15%, rather than 30%. After the code SL 191-2008 is revised, the amount of reinforcement by the code SDJ 20-1978 is the largest, the reinforcement by the code SL 191-2008 is moderate, and the reinforcement by the code DL/T 5057-2009 is the smallest. When the bearing plate, the flood-discharging deep orifice, and the upper lock head of the ship lift are regarded as plane problems, their amounts of reinforcement by codes DL/T 5057-2009 and DL/T 5057-1996 are close, with a maximum difference of only 4. 1%. When the effect of temperature is not considered, the tensile force that the concrete can bear is usually zero, and we can increase the amount of reinforcement to limit the crack width.
