满足裂缝宽度限值条件下纵向受拉钢筋的配筋量分析  

Analysis of Amount of Reinforcement of Longitudinal Tensile Steel Bars under the Condition of Meeting the Limiting Crack Width

作　　者：张晓燕[1] 刘许超[2] 

机构地区：[1]华北水利水电学院,河南郑州450011 [2]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《华北水利水电学院学报》2012年第4期48-51,共4页North China Institute of Water Conservancy and Hydroelectric Power

摘　　要：运用SL/T 191—96规范设计时,钢筋用量会出现由裂缝宽度限值控制的情况,为此新规范SL/T191—2008对裂缝宽度公式做了适当调整,降低了混凝土保护层厚度对裂缝宽度的影响.计算结果表明,在满足裂缝宽度限值的条件下,"2008规范"计算所需的纵向受拉钢筋的配筋量比"96规范"有所降低.通过两种规范的对比,给出了"2008规范"较"96规范"纵向钢筋配筋量的减少率,为工程设计提供了参考.The amount of reinforcement is controlled by the limiting crack width when designing by SL/T191--96 standard. Thus, the formula of crack width is modified properly in SL/T191--2008 standard and influences of the concrete cover thickness on the crack width decrease. Under the condition of meeting the limiting crack width, the required amount of reinforcement calculated by SL/T191--2008 standard decreases than SL/T191--96 standard. By means of the comparison of SL/T191--2008 standard and SL/T191--96 standard, the reducing rate about amount of reinforcement of longitudinal tensile steel bars is presented to he a reference for engineering design.

关 键 词：裂缝宽度限值 混凝土保护层厚度 纵向受拉钢筋的配筋量 减少率 

分 类 号：TU375[建筑科学—结构工程]