设计规范中钢混无腹筋梁受剪承载力计算公式对比分析

为了比较《混凝土结构设计规范》（GB50010—2010）和《公路钢筋混凝土及预应力混凝土桥涵设计规范》（JTGD62—2004）中受剪承载力计算公式的异同，分析了国内外528根跨高比不小于5的无腹筋梁剪切试验数据，得出当梁的有效高度大于600mm或纵筋率小于1．5％时，《混凝土结构设计规范》（GB50010—2010）预测结果偏于不安全。《混凝土结构设计规范》（GB50010—2010）预测结果离散型大，而《公路钢筋混凝土及预应力混凝土桥涵设计规范》（JTGD62—2004）预测结果相对保守。

CONTRASTIVE ANALYSIS ON CALCULATION FORMULAS FOR BEARING CAPACITY OF REINFORCED CONCRETE BEAM WITHOUT WEB REINFORCEMENT IN DIFFERENT DESIGN CODES

To compare the difference among design formulas for shear bearing capacity in Code for Design of Concrete Structure （GB 50010 -201 O） and Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Cul- verts （JTG D62 -2004）, shearing test data are analyzed for 528 pieces of beams without web reinforcement whose span - height ratio is not less than 5 at home and abroad. It is found that When the effective height of beam is higher than 600mm or percentage of longitudinal reinforcement is less than 1.5% , the calculation result of Code for Design of Concrete Structure （GB 50010 -2010） is probably unsafe. 1~he result of GB 50010 -2010 is obviously divergent and the result of JTG D62 - 2004 is relatively conservative.