預應(yīng)力混凝土梁橋預應(yīng)力損失及有效預應(yīng)力計算表1預應(yīng)力損失計算1.1控制應(yīng)力本設(shè)計預應(yīng)力鋼筋的張拉控制應(yīng)力σ1.2各項預應(yīng)力損失及計算原則JTG3362-2018《公路鋼筋混凝土及預應(yīng)力混凝土橋涵設(shè)計規(guī)范》規(guī)定，預應(yīng)力混凝土構(gòu)件在正常使用極限狀態(tài)計算中，采用后張法張拉預應(yīng)力鋼束時應(yīng)考慮以下五種引起預應(yīng)力損失的情況：（1）預應(yīng)力筋與管道壁間摩擦引起的應(yīng)力損失（σl1（2）錨具變形、鋼筋回縮和接縫壓縮引起的應(yīng)力損失（σl2（3）混凝土彈性壓縮引起的應(yīng)力損失（σl4（4）鋼筋松弛引起的應(yīng)力損失（σl5（5）混凝土收縮和徐變引起的應(yīng)力損失（σl6在預加應(yīng)力階段，預應(yīng)力筋中的有效預應(yīng)力為：σ在使用階段,預應(yīng)力筋中的有效預應(yīng)力,即永存預應(yīng)力為：σ2計算結(jié)果為了節(jié)省篇幅，輸出控制截面的損失值，以N1、N2、N3鋼束為例，分階段輸出：表8.1：預應(yīng)力張拉階段預應(yīng)力損失單元位置應(yīng)力(考慮瞬時損失)A(MPa)彈性變形損失B(MPa)比值(A+B)/A徐變/收縮損失(MPa)松弛損失(MPa)應(yīng)力(考慮所有損失)/應(yīng)力(考慮瞬時損失)1I1179044.94222233.16021.0019-6285.4044-13329.93490.98531J1187339.36971724.48711.0015-6796.5018-13870.77060.98405I1225254.12943252.33811.0027-11686.7755-16422.52430.97975J1243474.91393336.30701.0027-11876.2839-17695.13730.978910I1270986.01054276.96121.0034-14416.8111-19674.72300.976510J1265589.60844636.64091.0037-15290.2044-19280.71880.976315I1228138.80564785.20341.0039-15029.9947-16622.21550.978115J1216692.49474868.77561.0040-15219.3558-15835.08880.978519I1187615.01534370.63851.0037-18657.4438-13889.01330.976319J1172776.98494172.74041.0036-19358.5172-12928.91400.976023I1124380.03584341.51331.0039-19763.5732-9938.70440.977423J1105344.17024411.00351.0040-19619.2679-8804.29600.978326I1067105.37704579.98191.0043-19391.3106-6642.44980.979926J1065915.67744584.98831.0043-19379.7995-6577.47820.979931I1005604.17552776.55841.0028-13379.5694-3451.52790.986031J989163.89232561.20241.0026-12100.8723-2658.44760.987736I958901.423443.77971.0000-12464.5465-1263.19350.985736J952593.5130595.70161.0006-11659.1345-982.07650.987441I888221.5872904.65211.0010-18235.54140.00000.980541J872912.13671157.92711.0013-19781.77050.00000.978745I841546.59811277.41691.0015-21221.83450.00000.976345J832033.16231151.75381.0014-20909.01570.00000.976349I773718.66571196.31341.0015-21123.49140.00000.974249J763572.69011610.49951.0021-19036.52130.00000.977253I738783.35101924.89321.0026-15503.09310.00000.981653J743675.44731963.55781.0026-15717.24720.00000.9815表8.2：橋面鋪裝階段預應(yīng)力損失單元位置應(yīng)力(考慮瞬時損失)A(MPa)彈性變形損失B(MPa)比值(A+B)/A徐變/收縮損失(MPa)松弛損失(MPa)應(yīng)力(考慮所有損失)/應(yīng)力(考慮瞬時損失)1I1179044.9422-6774.74470.9943-24080.6424-24628.05520.95291J1187339.3697-5251.78410.9956-23710.1063-25627.28970.95405I1225254.1294-8050.01970.9934-35094.0045-30341.84630.94005J1243474.9139-10199.28990.9918-37463.1815-32693.09440.935410I1270986.0105-14793.22250.9884-46327.2506-36350.52750.923310J1265589.6084-16136.94890.9872-49132.9895-35622.57510.920315I1228138.8056-15469.60700.9874-48032.0960-30710.79070.923315J1216692.4947-15405.04160.9873-48309.5240-29256.51520.923619I1187615.0153-13127.66160.9889-52323.3734-25660.99450.923319J1172776.9849-12825.17720.9891-53313.7275-23887.13900.923223I1124380.0358-11757.58690.9895-52941.6087-18362.50240.926123J1105344.1702-10752.01790.9903-51736.9105-16266.59770.928826I1067105.3770-8950.21680.9916-49784.7632-12272.42460.933526J1065915.6774-8990.79950.9916-49811.8140-12152.38470.933431I1005604.1755-16283.74630.9838-45560.4977-6376.95680.932231J989163.8923-15912.20960.9839-42906.4528-4911.68140.935636I958901.42343301.82041.0034-27361.0816-2333.84470.972536J952593.5130-274.48150.9997-28874.2791-1814.46000.967541I888221.5872-2977.21380.9966-43223.16740.00000.948041J872912.136735.29161.0000-43357.94300.00000.950445I841546.59812435.62941.0029-43722.73660.00000.950945J832033.16231932.51991.0023-43607.78230.00000.949949I773718.66571461.39851.0019-44698.74570.00000.944149J763572.6901-179.05570.9998-42274.52010.00000.944453I738783.3510-2733.62950.9963-38101.32790.00000.944753J743675.4473-2623.75260.9965-38403.67390.00000.9448表8.3：收縮徐變階段預應(yīng)力損失單元位置應(yīng)力(考慮瞬時損失)A(MPa)彈性變形損失B(MPa)比值(A+B)/A徐變/收縮損失(MPa)松弛損失(MPa)應(yīng)力(考慮所有損失)/應(yīng)力(考慮瞬時損失)1I1179044.9422-5928.41510.9950-77289.7131-24628.05520.90851J1187339.3697-4458.41630.9962-76684.6643-25627.28970.91015I1225254.1294-6227.39570.9949-97410.4172-30341.84630.89075J1243474.9139-7998.73280.9936-101676.1574-32693.09440.885510I1270986.0105-11389.46780.9910-117622.2439-36350.52750.869910J1265589.6084-12298.68790.9903-122589.2364-35622.57510.865315I1228138.8056-11638.22300.9905-120432.6484-30710.79070.867515J1216692.4947-11545.39330.9905-120985.7350-29256.51520.867019I1187615.0153-8870.23790.9925-128069.1363-25660.99450.863119J1172776.9849-8529.04780.9927-130042.1673-23887.13900.861523I1124380.0358-7887.53440.9930-129931.4752-18362.50240.861123J1105344.1702-7147.28920.9935-127845.3107-16266.59770.863226I1067105.3770-5499.67040.9948-123993.1859-12272.42460.867126J1065915.6774-5510.16520.9948-124003.1069-12152.38470.867131I1005604.1755-12007.04860.9881-115489.7507-6376.95680.866931J989163.8923-11815.07890.9881-110522.3144-4911.68140.871436I958901.42346032.14291.0063-81619.8998-2333.84470.918736J952593.51302518.78281.0026-84612.0962-1814.46000.911941I888221.58721531.69331.0017-110570.77430.00000.877241J872912.13674127.18911.0047-111058.97510.00000.877545I841546.59816007.07771.0071-112340.72880.00000.873645J832033.1