【作者】 张建文； 曹双寅；

【Author】 Zhang Jianwen~1 Cao Shuangyin~2 (1.Department of Civil Engineering,Nanyang science and technology university,473004,China) (2.Department of Civil Engineering,Southeast University,210096,China)

【机构】 南阳理工学院土木工程系； 东南大学土木工程学院；

【摘要】 基于简单叠加法,考虑型钢对混凝土的约束,提出了型钢轻骨料混凝土梁抗弯承载力的改进叠加法计算公式。改进叠加法在混凝土承载力项中引入了混凝土抗弯承载力修正系数α_rc,对8个型钢轻骨料混凝土梁和8个型钢普通混凝土梁的抗弯承载力修正系数进行了分析。分析结果表明:当总含钢率与纵筋配筋率的比值在3.4%～10.8%时,α_rc和该比值成正比,α_rc的范围为1.0～2.0,改进的公式和钢筋混凝土梁抗弯承载力计算公式相衔接。试验结果对比表明:改进叠加法具有足够的精度,同时适用于型钢轻骨料混凝土梁和型钢普通混凝土梁。更多还原

【Abstract】 Improved superposition method of flexural strength of steel reinforced lightweight aggregate concrete beams is proposed considering the steel restraint to concrete based on simple superposition method.Correction coefficientα_rc of flexural strength is introduced in the improvement superposition method and is analyzed for eight steel reinforced lightweight concrete beams and eight steel reinforced common concrete beams.Analyses show thatα_rc is in proportion to ratio of the total steel ratio to longitudinal reinforcement steel ratio and ranges from 1.0 to 2.0 when the ratio ranges between 3.4% 10.8%.The improved method can be connected with flexural strength formula of reinforced concrete beams.It has enough accuracy and is suitable for both steel reinforced lightweight aggregate concrete beams and steel reinforced common concrete beams comparison with tests results.更多还原