混泥土预应力桥设计桥梁工程专业

I I第一章方案比选及细部尺寸拟定 1 1 2 2 5 6第一节全桥结构计算图式的确定 6 7 7 9 9 1好，刚度大，可保证工程本身安全，同时行车性连续刚构：一般做成薄壁墩，墩的刚度小，难2343.普通钢筋：钢筋采用R235、HRB335钢筋，其标准应符合GB13013-1991和变截面a变截面b(m2)0.85940.8594Asx(m2)0.4550.4550.53210.5741Asy(m2)0.29150.29150.6330.5192(m4)0.01620.01620.04940.0403(m4)0.40160.40160.4805(m4)0.19180.19180.20210.2403Cyp(m)Cym(m)12345变截面20.57410.85150.51920.04030.19610.24030.28122.088956全桥长223米，主梁采用T梁截面。本桥的基本设计资料有以下几点：1.设计荷载为采用盆式橡胶支座.6施工分界点、边界处及支座处。当出现位移不连续的7CS2、CS3、CS4、CS5、CS6、CSCS2:本阶段为将两跨30米梁的现浇段连接，并安装CS3：本阶段为将30米梁的临时支座去掉并张8个计算截面，并在施工分界点、边界处及支座处在定义施工阶段时，充分考虑了先简支后连续模9加力，混凝土收缩、徐变和温度变化等引起的结构次内力。组合，从中挑选最大设计内力，依此进行配筋设计和应力验算。在G1G2恒载内力S。G密切关系。特别在大、中跨预应力混凝土超静定梁桥G1G1L后加上去的，与施工方法无关，这部分内力桥面铺装层及栏杆采用普通钢筋混凝土，=24KN/m3。在使用阶段，结构已成为最终体系，其纵向的力学计计算分为两部分：第一部求某一主梁的最不利荷载横向分布系数m；第二部，应用主i制条件下，使Σmpy物线形的内力影响线，可直接使用等代荷载表计算S=（1+μ）.ξ.ΣmpyS=（1+μ）.ξ.m.k.Ωpp计算荷载的横向折减，但折减后的效应不得小于m——荷载横向分系数，计算主梁弯矩可用跨中荷载横向分布系数m代替全跨各ciiS=N.D.ξΣpyD——动力放大系数，本设计取D=1.15。即S=3.082Σpy在计算活载内力时，由于本设计采用的是程序自要将荷载按横向分布系数进行折减。标准荷载一致，但由于每车道上的活载同时出现最不利加载就是按最不利原则布置标准活载，通过位置N（kN）Fy(kN)Fz(kN)T(kN)My(kN*m)Mz(kN*m)1I3.67E-010.00E+004.63E+010.00E+000.00E+000.00E+00J2.65E+000.00E+004.71E+010.00E+006.85E+020.00E+00I-5.60E+000.00E+00-4.23E+020.00E+000.00E+000.00E+00J-2.95E+000.00E+00-3.80E+020.00E+00-8.29E+010.00E+002I7.85E-010.00E+004.70E+010.00E+006.85E+020.00E+00J2.74E+000.00E+007.04E+010.00E+000.00E+00I-7.80E+000.00E+00-3.80E+020.00E+00-8.29E+010.00E+00J-5.52E+000.00E+00-3.39E+020.00E+00-1.66E+020.00E+003I8.07E-010.00E+007.04E+010.00E+000.00E+00J8.07E-010.00E+009.89E+010.00E+000.00E+00I-1.88E-010.00E+00-3.39E+020.00E+00-1.66E+020.00E+00J-1.88E-010.00E+00-2.99E+020.00E+00-2.49E+020.00E+004I5.09E-010.00E+009.89E+010.00E+000.00E+00J5.09E-010.00E+000.00E+002.03E+030.00E+00I-1.91E-010.00E+00-2.99E+020.00E+00-2.49E+020.00E+00J-1.91E-010.00E+00-2.62E+020.00E+00-3.32E+020.00E+005I3.32E-010.00E+000.00E+002.03E+030.00E+00J3.32E-010.00E+000.00E+002.24E+030.00E+00I-1.88E-010.00E+00-2.62E+020.00E+00-3.32E+020.00E+00J-1.88E-010.00E+00-2.26E+020.00E+00-4.15E+020.00E+006I4.69E-020.00E+000.00E+002.24E+030.00E+00J4.69E-020.00E+000.00E+002.35E+030.00E+00I-3.88E-020.00E+00-2.26E+020.00E+00-4.15E+020.00E+00J-3.88E-020.00E+00-1.93E+020.00E+00-4.98E+020.00E+007I0.00E+000.00E+000.00E+002.35E+030.00E+00J0.00E+000.00E+002.22E+020.00E+002.35E+030.00E+00I0.00E+000.00E+00-1.93E+020.00E+00-4.98E+020.00E+00J0.00E+000.00E+00-1.62E+020.00E+00-5.81E+020.00E+008I0.00E+000.00E+002.22E+020.00E+002.35E+030.00E+00J0.00E+000.00E+002.55E+020.00E+002.25E+030.00E+00I0.00E+000.00E+00-1.62E+020.00E+00-5.81E+020.00E+00J0.00E+000.00E+00-1.33E+020.00E+00-6.64E+020.00E+009I0.00E+000.00E+002.55E+020.00E+002.25E+030.00E+00J0.00E+000.00E+002.87E+020.00E+002.06E+030.00E+00I0.00E+000.00E+00-1.33E+020.00E+00-6.64E+020.00E+00J0.00E+000.00E+00-1.06E+020.00E+00-7.47E+020.00E+00I7.12E-020.00E+002.87E+020.00E+002.06E+030.00E+00J7.12E-020.00E+003.20E+020.00E+000.00E+00I-1.96E-020.00E+00-1.06E+020.00E+00-7.47E+020.00E+00J-1.96E-020.00E+00-8.22E+010.00E+00-8.29E+020.00E+00I4.77E-010.00E+003.20E+020.00E+000.00E+00J4.77E-010.00E+003.52E+020.00E+000.00E+00I-8.60E-020.00E+00-8.22E+010.00E+00-8.29E+020.00E+00J-8.60E-020.00E+00-6.06E+010.00E+00-9.12E+020.00E+00I6.97E-010.00E+003.52E+020.00E+000.00E+00J6.97E-010.00E+003.84E+020.00E+000.00E+00I-7.74E-020.00E+00-6.06E+010.00E+00-9.12E+020.00E+00J-7.74E-020.00E+00-4.16E+010.00E+00-9.95E+020.00E+00I0.00E+003.84E+020.00E+000.00E+00J0.00E+004.16E+020.00E+006.11E+020.00E+00I-6.14E-020.00E+00-4.16E+010.00E+00-9.95E+020.00E+00J-6.14E-020.00E+00-2.51E+010.00E+00-1.15E+030.00E+00I0.00E+004.16E+020.00E+006.11E+020.00E+00J0.00E+004.46E+020.00E+002.77E+020.00E+00I-7.31E+000.00E+00-2.51E+010.00E+00-1.15E+030.00E+00J-9.15E+000.00E+00-1.13E+010.00E+00-1.41E+030.00E+00I0.00E+004.46E+020.00E+002.77E+020.00E+00J3.16E-020.00E+004.68E+020.00E+006.43E+010.00E+00I-5.83E+000.00E+00-1.13E+010.00E+00-1.41E+030.00E+00J-7.09E+000.00E+00-2.59E+000.00E+00-1.68E+030.00E+00位置N（kN）Fy(kN)Fz(kN)T(kN)My(kN*m)Mz(kN*m)I6.44E-010.00E+005.50E+010.00E+000.00E+000.00E+00J0.00E+005.55E+010.00E+009.64E+020.00E+00I-7.94E+000.00E+00-5.96E+020.00E+000.00E+000.00E+00J-6.44E+000.00E+00-5.60E+020.00E+00-9.47E+010.00E+00I0.00E+005.55E+010.00E+009.64E+020.00E+00J2.66E+000.00E+006.37E+010.00E+000.00E+00I-1.24E+010.00E+00-5.60E+020.00E+00-9.47E+010.00E+00J-1.03E+010.00E+00-5.23E+020.00E+00-1.94E+020.00E+00I0.00E+006.37E+010.00E+000.00E+00J0.00E+008.55E+010.00E+002.69E+030.00E+00I-1.55E-010.00E+00-5.23E+020.00E+00-1.94E+020.00E+00J-1.55E-010.00E+00-4.87E+020.00E+00-2.94E+020.00E+00I9.48E-010.00E+008.55E+010.00E+002.69E+030.00E+00J9.48E-010.00E+000.00E+003.40E+030.00E+00I-1.77E-010.00E+00-4.87E+020.00E+00-2.94E+020.00E+00J-1.77E-010.00E+00-4.52E+020.00E+00-3.94E+020.00E+00I6.53E-010.00E+000.00E+003.40E+030.00E+00J6.53E-010.00E+000.00E+004.01E+030.00E+00I-1.67E-010.00E+00-4.52E+020.00E+00-3.94E+020.00E+00J-1.67E-010.00E+00-4.18E+020.00E+00-4.93E+020.00E+00I4.97E-010.00E+000.00E+004.01E+030.00E+00J4.97E-010.00E+000.00E+004.52E+030.00E+00I-1.67E-010.00E+00-4.18E+020.00E+00-4.93E+020.00E+00J-1.67E-010.00E+00-3.86E+020.00E+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MAX-6.53E+034.82E+02-2.41E+03JcLCB11FX-MIN-6.53E+033.12E+02-2.71E+03JcLCB11FZ-MAX-6.53E+034.82E+02-2.41E+03JcLCB11FZ-MIN-6.53E+033.12E+02-2.71E+03JcLCB11MY-MAX-6.53E+034.82E+02-2.41E+03JcLCB11MY-MIN-6.53E+033.12E+02-2.71E+03JcLCB12FX-MAX-6.53E+035.11E+02-2.00E+03JcLCB12FX-MIN-6.54E+038.38E+01-2.76E+03JcLCB12FZ-MAX-6.53E+035.11E+02-2.00E+03JcLCB12FZ-MIN-6.54E+038.38E+01-2.76E+03JcLCB12MY-MAX-6.53E+035.11E+02-2.00E+03JcLCB12MY-MIN-6.54E+038.38E+01-2.76E+03位置位置组合名称类型I--1.58E+00-2.20E+02IFX-MAX-1.56E+004.67E+01IFX-MIN-1.58E+00-6.99E+02IFZ-MAX-1.56E+004.67E+01IFZ-MIN-1.58E+00-6.99E+02IMY-MAX-1.56E+004.67E+01IMY-MIN-1.58E+00-6.99E+02I--1.58E+00-2.10E+02IFX-MAX-1.56E+005.49E+01IFX-MIN-1.58E+00-6.90E+02IFZ-MAX-1.56E+005.49E+01IFZ-MIN-1.58E+00-6.90E+02IMY-MAX-1.56E+005.49E+01IMY-MIN-1.58E+00-6.90E+02I--1.31E+00-1.74E+02IFX-MAX-1.30E+009.31E+01IFX-MIN-1.32E+00-6.52E+028.65E+03IFZ-MAX-1.30E+009.31E+01IFZ-MIN-1.32E+00-6.52E+028.65E+03IMY-MAX-1.30E+009.31E+01IMY-MIN-1.32E+00-6.52E+028.65E+03I--1.31E+00-1.64E+02IFX-MAX-1.30E+00IFX-MIN-1.32E+00-6.44E+028.43E+03IFZ-MAX-1.30E+00IFZ-MIN-1.32E+00-6.44E+028.43E+03IMY-MAX-1.30E+00IMY-MIN-1.32E+00-6.44E+028.43E+03I--7.57E+03-1.53E+02-1.16E+03IcLCB10FX-MAX-7.57E+03-1.22E+012.47E+03IcLCB10FX-MIN-7.57E+03-3.85E+02-2.26E+03IcLCB10FZ-MAX-7.57E+03-1.22E+012.47E+03IcLCB10FZ-MIN-7.57E+03-3.85E+02-2.26E+03IcLCB10MY-MAX-7.57E+03-1.22E+012.47E+03IcLCB10MY-MIN-7.57E+03-3.85E+02-2.26E+03IcLCB11FX-MAX-7.57E+03-6.94E+018.29E+02IcLCB11FX-MIN-7.57E+03-2.82E+02-1.87E+03IcLCB11FZ-MAX-7.57E+03-6.94E+018.29E+02IcLCB11FZ-MIN-7.57E+03-2.82E+02-1.87E+03IcLCB11MY-MAX-7.57E+03-6.94E+018.29E+02IcLCB11MY-MIN-7.57E+03-2.82E+02-1.87E+03IcLCB12FX-MAX-7.57E+034.50E+014.11E+03IcLCB12FX-MIN-7.57E+03-4.87E+02-2.65E+03IcLCB12FZ-MAX-7.57E+034.50E+014.11E+03IcLCB12FZ-MIN-7.57E+03-4.87E+02-2.65E+03IcLCB12MY-MAX-7.57E+034.50E+014.11E+03IcLCB12MY-MIN-7.57E+03-4.87E+02-2.65E+03J--1.58E+00-1.14E+02JFX-MAX-1.57E+002.04E+04JFX-MIN-1.58E+00-5.54E+02JFZ-MAX-1.57E+002.04E+04JFZ-MIN-1.58E+00-5.54E+02JMY-MAX-1.57E+002.04E+04JMY-MIN-1.58E+00-5.54E+02J--1.58E+00-1.04E+02JFX-MAX-1.57E+002.02E+04JFX-MIN-1.59E+00-5.46E+02JFZ-MAX-1.57E+002.02E+04JFZ-MIN-1.59E+00-5.46E+02JMY-MAX-1.57E+002.02E+04JMY-MIN-1.59E+00-5.46E+02J--1.32E+00-8.56E+01JFX-MAX-1.30E+002.15E+02JFX-MIN-1.32E+00-5.25E+029.05E+03JFZ-MAX-1.30E+002.15E+02JFZ-MIN-1.32E+00-5.25E+029.05E+03JMY-MAX-1.30E+002.15E+02JMY-MIN-1.32E+00-5.25E+029.05E+03J--1.32E+00-7.53E+01JFX-MAX-1.30E+002.23E+02JFX-MIN-1.32E+00-5.17E+028.81E+03JFZ-MAX-1.30E+002.23E+02JFZ-MIN-1.32E+00-5.17E+028.81E+03JMY-MAX-1.30E+002.23E+02JMY-MIN-1.32E+00-5.17E+028.81E+03J--7.62E+03-8.86E+01-9.97E+02JcLCB10FX-MAX-7.62E+036.90E+012.71E+03JcLCB10FX-MIN-7.62E+03-3.01E+02-2.04E+03JcLCB10FZ-MAX-7.62E+036.90E+012.71E+03JcLCB10FZ-MIN-7.62E+03-3.01E+02-2.04E+03JcLCB10MY-MAX-7.62E+036.90E+012.71E+03JcLCB10MY-MIN-7.62E+03-3.01E+02-2.04E+03JcLCB11FX-MAX-7.62E+034.57E+00JcLCB11FX-MIN-7.62E+03-2.07E+02-1.68E+03JcLCB11FZ-MAX-7.62E+034.57E+00JcLCB11FZ-MIN-7.62E+03-2.07E+02-1.68E+03JcLCB11MY-MAX-7.62E+034.57E+00JcLCB11MY-MIN-7.62E+03-2.07E+02-1.68E+03JcLCB12FX-MAX-7.62E+034.39E+03JcLCB12FX-MIN-7.62E+03-3.95E+02-2.40E+03JJcLCB12FZ-MAX-7.62E+034.39E+03JcLCB12FZ-MIN-7.62E+03-3.95E+02-2.40E+03JcLCB12MY-MAX-7.62E+034.39E+03JcLCB12MY-MIN-7.62E+03-3.95E+02-2.40E+03位置组合名称类型I--1.35E+012.26E+03IFX-MAX-1.13E+013.68E+03IFX-MIN-2.23E+019.86E+022.13E+03IFZ-MAX-1.13E+013.68E+03IFZ-MIN-2.23E+019.86E+022.13E+03IMY-MAX-1.13E+013.68E+03IMY-MIN-2.23E+019.86E+022.13E+03I--1.37E+012.16E+03IFX-MAX-1.14E+013.60E+03IFX-MIN-2.24E+019.45E+022.04E+03IFZ-MAX-1.14E+013.60E+03IFZ-MIN-2.24E+019.45E+022.04E+03IMY-MAX-1.14E+013.60E+03IMY-MIN-2.24E+019.45E+022.04E+03I--1.14E+018.96E+02IFX-MAX-9.13E+003.32E+03IFX-MIN-2.01E+018.18E+02IFZ-MAX-9.13E+003.32E+03IFZ-MIN-2.01E+018.18E+02IMY-MAX-9.13E+003.32E+03IMY-MIN-2.01E+018.18E+02I--1.16E+018.45E+02IFX-MAX-9.31E+003.24E+03IIIIII-IIIIIIIIIIIIIIIIIIJ-JJJJJMY-MAX-1.45E+012.04E+037.18E-02JMY-MIN-2.63E+017.18E-02J--1.56E+017.18E-02JFX-MAX-1.47E+012.00E+037.18E-02JFX-MIN-2.64E+017.18E-02JFZ-MAX-1.47E+012.00E+037.18E-02JFZ-MIN-2.64E+017.18E-02JMY-MAX-1.47E+012.00E+037.18E-02JMY-MIN-2.64E+017.18E-02J--1.29E+015.98E-02JFX-MAX-1.21E+015.98E-02JFX-MIN-2.38E+019.37E+025.98E-02JFZ-MAX-1.21E+015.98E-02JFZ-MIN-2.38E+019.37E+025.98E-02JMY-MAX-1.21E+015.98E-02JMY-MIN-2.38E+019.37E+025.98E-02J--1.32E+019.63E+025.98E-02JFX-MAX-1.22E+015.98E-02JFX-MIN-2.40E+018.97E+025.98E-02JFZ-MAX-1.22E+015.98E-02JFZ-MIN-2.40E+018.97E+025.98E-02JMY-MAX-1.22E+015.98E-02JMY-MIN-2.40E+018.97E+025.98E-02J--1.29E+015.98E-02JcLCB10FX-MAX-1.27E+015.98E-02JcLCB10FX-MIN-1.85E+019.39E+025.98E-02JcLCB10FZ-MAX-1.27E+015.98E-02JcLCB10FZ-MIN-1.85E+019.39E+025.98E-02JcLCB10MY-MAX-1.27E+015.98E-02JcLCB10MY-MIN-1.85E+019.39E+025.98E-02JcLCB11FX-MAX-1.28E+015.98E-02JcLCB11FX-MIN-1.62E+019.56E+025.98E-02JcLCB11FZ-MAX-1.28E+015.98E-02JcLCB11FZ-MIN-1.62E+019.56E+025.98E-02JcLCB11MY-MAX-1.28E+015.98E-02JcLCB11MY-MIN-1.62E+019.56E+025.98E-02JcLCB12FX-MAX-1.25E+015.98E-02JcLCB12FX-MIN-2.09E+019.23E+025.98E-02JcLCB12FZ-MAX-1.25E+015.98E-02JcLCB12FZ-MIN-2.09E+019.23E+025.98E-02JcLCB12MY-MAX-1.25E+015.98E-02JcLCB12MY-MIN-2.09E+019.23E+025.98E-02G1G2G上下上AWAW下N上A-N上e上+N下WA下+N下e下W下可得到上缘和下缘预应力筋的数目:时:n下=Mmax/(e下+K上)fσ虑:得到:n上=-Mmin/(e下+K上)fσ得到:n上=Mmax/(K上-e上)fσ本设计预应力钢束按照桥梁标准图进行布置，共配置钢束名称A1A2A3A4B1B2B3荷载工况预应力预应力预应力预应力预应力预应力预应力预应力张力类型应力应力应力应力应力应力应力应力张拉位置开始点应力结束点应力开始点00000000结束点00000000注浆00000000荷载组预应力1预应力1预应力1预应力1预应力1预应力1预应力1预应力D1D2D3D4预应力预应力预应力预应力预应力预应力预应力预应力预应力预应力预应力预应力预应力预应力预应力应力应力应力应力应力应力应力应力应力应力应力应力应力应力应力0000000000000000000000000000000000000000000001预应力3预应力3预应力3预应力3预应力3预应力3预应力3预应力3预应力3预应力3预应力3预应力3预应力2预应力2预应力2预应力预应力应力0002预应力预应力应力0002预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004预应力预应力应力0004k失σ;混凝土弹性压缩损失σ;预应力索的应力松弛损失σ;混凝土的收缩徐变损（1）预应力筋与管道间的摩察损失σ,-(uθ+kx)]其中u=0.35，k=0.003.应力损失时，认为接缝在第一批钢束锚固后既完摩阻作用，为保守设计，本设计不考虑该项以补偿钢在采用超张拉方法施工中，由钢绞线松弛引起的损失终极值σ=0.045σ,锚下控制CSCS1位置m预应力kNCS4位置m预应力kNCS5位置m预应力kNCS7位置m预应力kN0.2010.7052.2160.2010.7052.2160.2010.7052.2160.2010.7052.2164.2314.2314.2314.2314.7354.7354.7354.7352001.3576.2462008.3276.2466.2466.2462015.3152022.892006.4592002.6882029.8392014.4882010.7138.2612037.1558.2612022.6288.2612018.7948.2618.7652044.0278.7652030.7258.7652026.8838.7659.2759.2759.2759.2759.7769.7769.7769.77620.2820.2820.2820.2820.792082.05720.792085.56820.792081.48120.792016.97221.2942028.09721.2942032.29921.2942028.58821.29421.7972021.40421.7972024.97121.7972021.32221.79722.3012013.77722.3012016.15322.3012012.49822.30122.8052006.80122.8052007.95122.8052004.322.80523.30823.30823.30823.30823.81223.81223.81223.81224.31624.31624.31624.31624.8224.8224.8224.8225.32425.32425.32425.32425.82725.82725.82725.82726.33126.33126.33126.33126.83526.83526.83526.83527.33927.33927.33927.33927.84227.84227.84227.84228.2228.2228.2228.2228.59828.59828.59828.59828.97628.97628.97628.97629.35329.35329.35329.353CS1位置m预应力kNCS2位置m预应力kNCS3位置m预应力kNCS4位置m预应力kN000011112222333344444.3754.3754.3754.3754.754.754.754.7566666.1256.1256.1256.1256.3756.3756.3756.3756.8756.8756.8756.87588889999梁中预应力筋分为两种，一种是预制梁内已有的配束第五章全桥应力验算根据承载能力极限状态组合的结果，判定截11hh式中：ξy=18.3cmcc位置最大/最小组合名称类型验算rMv(kN.m)Mn(kN.m)1-----1-----1J[2]FX-MAX2243.3631J[2]FX-MIN724.54482FX-MAX2243.3632FX-MIN724.54482J[3]FX-MAX4100.632J[3]FX-MIN3FX-MAX4100.633FX-MIN3J[4]FX-MAX5593.2833J[4]FX-MIN4FX-MAX5593.2834FX-MIN4J[5]FX-MAX6728.6494J[5]FX-MIN2277.7695FX-MAX6728.6495FX-MIN2277.7695J[6]FX-MAX7511.5615J[6]FX-MIN2533.866FX-MAX7511.5616FX-MIN2533.866J[7]FX-MAX7948.1626J[7]FX-MIN2662.9847FX-MAX7948.1627FX-MIN2662.9847J[8]FX-MAX8045.9547J[8]FX-MIN2648.3988FX-MAX8045.9548FX-MIN2648.3988J[9]FX-MAX7813.8268J[9]FX-MIN2485.9179FX-MAX7813.8269FX-MIN2485.9179J[10]FX-MAX7262.0459J[10]FX-MIN2175.54FX-MAX7262.045FX-MIN2175.54J[11]FX-MAX6402.262J[11]FX-MINFX-MAX6402.262FX-MINJ[12]FX-MAX5261.636J[12]FX-MINFX-MAX5261.636FX-MINJ[13]FX-MAX3893.587J[13]FX-MIN339.1331FX-MAX3941.168839.826FX-MIN372.38728839.826J[14]FX-MAX2426.0117434.426J[14]FX-MIN-669.915FX-MAX2425.9827433.326FX-MIN-669.936J[15]FX-MAX871.86746626.426J[15]FX-MIN-2046.794698.528FX-MAX871.87876626.561FX-MIN-2046.784685.258J[16]J[16]-244.226J[16]J[16]-244.226-3413.71FX-MINh0—通过斜截面受压区顶端截面上的有效高度，自受拉p在使用荷载（组合Ⅰ)作用下，全预应力梁截面受拉边缘由预加力引起的预压应h应力计算，其结果表明受拉区（组合Ⅰ)都未出现拉应力。jj=QgQpSjj；在oo上的τp+g2=QgQpSoo；pτ—预加力引起的剪应力，由钢束锚固时产生的和σys式中：σ—预加力和使用荷载在计算主应力点上产生的混凝土法向应力σ—在计算主应力点上由预加应力（扣除全部应力损失）产生的混凝土hsp0yp对于钢束载使用荷载作用下，预应力钢束的应力位置J[93]J[93]J[94]J[94]J[95]J[95]J[96]J[96]J[97]最大/最小验算类型验算rVd(kN)Vn(kN)验算FX-MINFX-MAXFX-MIN