摘要
讨论了高强钢筋混凝土梁在疲劳荷载作用下裂缝开展的情况,采用考虑静载作用下的裂缝宽度和混凝土应变增大系数来建立缝宽度的计算公式,并在此基础上由解析刚度法建立了疲劳刚度的计算方法,并对这些公式进行了合理简化和统一,使之更适合工程实际.最后用9根高强钢筋混凝土梁的试验数据进行了验算,结果表明试验值和计算值吻合良好.
Crack Development of high strength reinforced concrete beams under fatigue load is discussed in the paper. With the strain increase coefficient of concrete, calculation formula of crack width is set up according to crack with under static load.Calculation method of fatigue stiffness is put forward by parse rigidity means. These formulas are simplified and unified to fit engineer practice.Finally calculated values have good agreement with test datum of 9 high-strength reinforced concrete beams.
出处
《河北建筑工程学院学报》
CAS
2004年第1期1-6,共6页
Journal of Hebei Institute of Architecture and Civil Engineering
基金
铁道部科技计划项目
