通港大道分离立交30m预应力砼组合矮箱梁预应力钢绞线张拉理论伸长量计算表钢束编号惠安N1N2N3N4南安N1N2N3N4555414745121131475010518147558923146751705450000.269177778450000.233733333450000.198288889300000.0568333330.00150.00150.00150.00150.250.250.250.2514.74514.7514.75514.6756956956955561950009695251950009695251950009695251950007756209274459315019355817617412112122132154224244264304444146801389514695122881471010681145801797450000.308777778450000.273066667450000.237355556300000.05990.00150.00150.00150.00150.250.250.250.2514.6814.69514.7114.58556556556556195000775620195000775620195000775620195000775620738385741628744890761505209210211214418420422428每束根数一联边跨半跨钢束总长(mm)曲线长度(mm)曲线半径(mm)θkradμ(m)(mm2)MpaNNmmmmxApEpPPp△L2△L