东南大学学报（自然科学版）
東南大學學報（自然科學版）
동남대학학보（자연과학판）
JOURNAL OF SOUTHEAST UNIVERSITY
2014年
1期
140-144
,共5页
波形钢腹板%动力性能%自振频率%模态分析%预应力钢束
波形鋼腹闆%動力性能%自振頻率%模態分析%預應力鋼束
파형강복판%동력성능%자진빈솔%모태분석%예응력강속
corrugated steel webs%dynamic behavior%vibration frequency%model analysis%exter-nally prestressed tendons
为了研究体外预应力对波形钢腹板箱梁动力特性的影响，推导了波形钢腹板箱梁在体外预应力作用下的自振频率计算公式．以5．2 m缩尺波形钢腹板试验梁为对象，利用有限元软件ANSYS建立了预应力波形钢腹板箱梁的模型，对其进行了模态分析．通过对试验梁模态试验的自振频率测试数据与理论计算值以及有限元分析数据进行对比，证明了理论公式推导的正确性，论证了有限元模型的适用性．采用理论计算和有限元数值计算相结合的方法，研究了体外预应力钢束拉力、锚固位置以及截面积对波形钢腹板自振频率的影响．研究结果表明：三者对波形钢腹板箱梁自振频率的影响均较小，在实际工程中可以忽略体外预应力对波形钢腹板箱梁动力特性的影响．
為瞭研究體外預應力對波形鋼腹闆箱樑動力特性的影響，推導瞭波形鋼腹闆箱樑在體外預應力作用下的自振頻率計算公式．以5．2 m縮呎波形鋼腹闆試驗樑為對象，利用有限元軟件ANSYS建立瞭預應力波形鋼腹闆箱樑的模型，對其進行瞭模態分析．通過對試驗樑模態試驗的自振頻率測試數據與理論計算值以及有限元分析數據進行對比，證明瞭理論公式推導的正確性，論證瞭有限元模型的適用性．採用理論計算和有限元數值計算相結閤的方法，研究瞭體外預應力鋼束拉力、錨固位置以及截麵積對波形鋼腹闆自振頻率的影響．研究結果錶明：三者對波形鋼腹闆箱樑自振頻率的影響均較小，在實際工程中可以忽略體外預應力對波形鋼腹闆箱樑動力特性的影響．
위료연구체외예응력대파형강복판상량동력특성적영향，추도료파형강복판상량재체외예응력작용하적자진빈솔계산공식．이5．2 m축척파형강복판시험량위대상，이용유한원연건ANSYS건립료예응력파형강복판상량적모형，대기진행료모태분석．통과대시험량모태시험적자진빈솔측시수거여이론계산치이급유한원분석수거진행대비，증명료이론공식추도적정학성，론증료유한원모형적괄용성．채용이론계산화유한원수치계산상결합적방법，연구료체외예응력강속랍력、묘고위치이급절면적대파형강복판자진빈솔적영향．연구결과표명：삼자대파형강복판상량자진빈솔적영향균교소，재실제공정중가이홀략체외예응력대파형강복판상량동력특성적영향．
In order to research the influence of externally prestressed tendons on the vibration fre-quency of a box girder with corrugated steel webs,the calculation formula for vibration frequency of the box girder with corrugated steel webs is deduced.Based on a 5 .2 m reduced scale experimental box girder model with corrugated steel webs,a finite element model is established by finite element analysis software ANSYS for modal analysis.The datum of dynamic testing,theoretical calculating and finite element analyzing verify the correctness of the proposed formula and the applicability of fi-nite element model.The theoretical calculation and the finite element analysis is combined to re-search the influence of the magnitude of the prestressing force,the anchor position and the size of the cross-sectional area on the vibration frequency of the box girder with corrugated steel webs.The re-sults show that all mentioned factors have little influence on the vibration frequency of the box girder with corrugated steel webs.And in the practical engineering,the influence of externally prestressed tendons on dynamic characteristics of the box girder with corrugated steel webs can be neglected.
