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加筋高性能砂浆加固RC梁抗弯性能及承载力计算

, PP. 67-74

Keywords: 桥梁工程,加筋高性能砂浆,抗弯性能试验,加固,承载力计算

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Abstract:

?为统一中国对加筋高性能砂浆加固RC梁抗弯性能的认识,以中国学者所做95根加筋高性能砂浆加固的钢筋混凝土梁抗弯性能试验研究为基础,分析加固梁的受力性能和破坏机理,在此基础上考虑一次受力、二次受力、持载程度、加固筋类型、加固筋数量、混凝土强度等级等因素影响,建立加固梁抗弯承载力计算公式、刚度计算公式和裂缝宽度计算公式,并与试验数据进行了对比。结果表明:该加固技术采用高强钢绞线、钢筋网、钢丝网作为受力材料,虽然三者受力性能存在显著差异,但加固构件力学性能和破坏机理相似,可按统一计算公式进行承载力设计;公式计算值与试验结果符合良好,可用于实际工程计算。

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[72]  0.183 0.267 0.913 0.890 0.231 0.308 1.157 1.028 0.183 0.267 0.913 0.890 0.231 0.308 1.157 1.028 点焊
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[76]  0.255 0.367 1.276 1.222 0.238 0.336 1.190 1.120 0.239 0.326 1.193 1.088 0.255 0.383 1.276 1.276 0.238 0.350 1.190 1.167 0.239 0.339 1.193 1.130 0.252 0.350 1.260 1.167 0.239 0.339 1.193 1.130 0.228 0.319 1.140 1.064 0.255 0.367 1.276 1.222 0.238 0.336 1.190 1.120 0.239 0.326 1.193 1.088 0.255 0.383 1.276 1.276 0.238 0.350 1.190 1.167 0.239 0.339 1.193 1.130 0.252 0.350 1.260 1.167 0.239 0.339 1.193 1.130 0.228 0.319 1.140 1.064 人工
[77]  编制
[78]  钢丝网 BSA-BB1 BSA-BB2 BSA-BC1 BSA-BC2 BSA-BB1 BSA-BB2 BSA-BC1 BSA-BC2 文献
[79]  0.196 0.285 0.981 0.951 0.204 0.286 1.020 0.952 0.205 0.303 1.026 1.011 0.212 0.294 1.061 0.979 0.196 0.285 0.981 0.951 0.204 0.286 1.020 0.952 0.205 0.303 1.026 1.011 0.212 0.294 1.061 0.979 点焊
[80]  钢丝网 BSB-B1 BSB-B2 BSB-C1 BSB-C2 BSB-C3 BSB-B1 BSB-B2 BSB-C1 BSB-C2 BSB-C3 文献
[81]  0.193 0.292 0.967 0.974 0.181 0.278 0.903 0.926 0.191 0.287 0.956 0.956 0.190 0.295 0.950 0.985 0.190 0.293 0.951 0.975 0.193 0.292 0.967 0.974 0.181 0.278 0.903 0.926 0.191 0.287 0.956 0.956 0.190 0.295 0.950 0.985 0.190 0.293 0.951 0.975

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