水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2014年
1期
92-95,104
,共5页
横张预应力%能量变分法%剪力滞效应%迭加原理
橫張預應力%能量變分法%剪力滯效應%迭加原理
횡장예응력%능량변분법%전력체효응%질가원리
cross-prestress%energy variation method%shear lag effect%superposition principle
结合横张预应力简支箱型梁的构造特点，根据能量变分法所推导的对称单箱单室箱梁桥剪力滞效应理论、剪力滞叠加原理及等效荷载法，分析了跨中截面的剪力滞系数。结果表明：横张预应力混凝土简支箱梁中钢束布置形式以及有效预应力是影响恒载与预应力荷载共同作用下简支箱型梁剪力滞效应的重要因素；同时在结构跨径及构造形式一定的情况下，剪力滞系数与预应力布置形状及恒载作用存在一定的规律性。
結閤橫張預應力簡支箱型樑的構造特點，根據能量變分法所推導的對稱單箱單室箱樑橋剪力滯效應理論、剪力滯疊加原理及等效荷載法，分析瞭跨中截麵的剪力滯繫數。結果錶明：橫張預應力混凝土簡支箱樑中鋼束佈置形式以及有效預應力是影響恆載與預應力荷載共同作用下簡支箱型樑剪力滯效應的重要因素；同時在結構跨徑及構造形式一定的情況下，剪力滯繫數與預應力佈置形狀及恆載作用存在一定的規律性。
결합횡장예응력간지상형량적구조특점，근거능량변분법소추도적대칭단상단실상량교전력체효응이론、전력체첩가원리급등효하재법，분석료과중절면적전력체계수。결과표명：횡장예응력혼응토간지상량중강속포치형식이급유효예응력시영향항재여예응력하재공동작용하간지상형량전력체효응적중요인소；동시재결구과경급구조형식일정적정황하，전력체계수여예응력포치형상급항재작용존재일정적규률성。
Combining with the construction features of cross-prestressed simply-supported box beam ,the shear lag coeffi-cient of mid-span section is analyzed based on the shear lag effect theory and shear lag superposition principle derived from the existing energy variation method of symmetrical single cell box girder bridge as well as the equivalent load method .The results show that the steel beam arrangement and effective prestress of cross-prestressed concrete simply-sup-ported box girder are the important factors to affect the shear lag effect of the simply-supported box beam under the joint action of dead load and prestressed load ;when the structural span and constructed form are constant ,there is a certain regularity between the shear lag coefficient and prestress layout shape form as well as the dead load .
