1、桥墩抗震计算报告解读1、荷载 22、地震计算参数 23、工况组合 44、计算软件及模型 45、桥墩截面尺寸 56、计算结果 66.1 E1地震作用纵、横桥向桥墩强度计算（抗震规范7.3.1）： 66.2 E2地震作用桥墩桩、柱抗震强度验算 136.2.1 墩柱有效抗弯刚度计算（抗震规范第6.1.6条） 136.2.2 E2地震作用下能力保护构件计算（抗震规范6.8条） 146.2.3 E2地震作用下墩柱抗震强度验算（抗震规范7.3.4） 176.3 E2地震作用变形验算（抗震规范第7.4条） 176.3.1 墩顶位移验算（抗震规范第7.4.6条） 176.4 E2地震作用下支座验算（抗震规范7
2、.5.1） 216.5延性构造细节设计(抗震规范8.1条) 237、抗震计算结论 23主线桥左幅桥30+35+31.501m连续箱梁下部桥墩抗震计算报告1、荷载考虑上部箱梁自重及二期恒载包括桥面铺装和栏杆，下部桥墩自重，程序自动考虑，混凝土容重取26kN/ m3，计算时将荷载转化为质量。2、地震计算参数按中国地震动参数区划图（GB18306-2001）、福建省区划一览表、福州绕城公路西北段线路工程地震安全性评价补充报告，根据规范表3.1.2判定本桥梁抗震设防类别为B类。桥址所在地抗震设防烈度为度，场地类型为类，根据抗震细则的9.3.6条规定，混凝土梁桥、拱桥的阻尼比不宜大于0.05，因此在这里
3、取阻尼比为0.05。设防目标：E1地震作用下，一般不受损坏或不需修复可继续使用；E2地震作用下，应保证不致倒塌或产生严重结构损伤，经临时加固后可维持应急交通使用。按抗震规范6.1.3，本桥为规则桥梁，抗震规范表6.1.4：本桥E1、E2作用均可采用SM/MM分析计算方法。抗震分析采用多振型反应谱法，水平设计加速度反应谱S由下式（规范5.2.1）确定：式中：Tg特征周期(s)； T结构自振周期(s)；水平设计加速度反应谱最大值；Ci抗震重要性系数；Cs场地系数；Cd阻尼调整系数；A水平向设计基本地震加速度峰值。反应谱拟合的相关参数见下表：反应谱拟合相关参数表TgCiCsCdAE1地震0.40.5
4、 1.0 1.0 0.1gE2地震0.4 1.7 1.0 1.0 0.1g E1地震作用加速度反应谱E2地震作用加速度反应谱3、工况组合1、永久作用，包括结构重力（恒载）、预应力、土压力、水压力。2、地震作用，地震动作用和地震土压力、水压力。E1地震作用：永久作用+地震作用；E2地震作用：永久作用+地震作用+支座摩阻力；4、计算软件及模型30+33.5+31.5m箱梁，单箱六室，梁高2m，抗震计算采用空间模型，模型依据规范6.3条建模原则考虑上下部的共同刚度。采用盆式支座时，支座和桥墩刚度串联计算。固定盆式支座刚度可视为无限大；活动盆式支座刚度参考JTG/TB02-01-2008中初始剪切刚性
5、k=F/x计算。（F为摩阻力F=uR,u为滑动摩擦系数，一般取值0.02，R为支座反力。x一般取0.0020.005，本计算取值0.002）纵桥及横桥向剪切刚度计算值为K=7000*0.02/0.002=70000kN/m，竖向刚度视为无限大。 支座计算刚度桥墩底偏于保守的采用固结，暂未考虑桩基础的影响。具体模型见下图。抗震计算结构模实体模型 E2地震作用建立整体分析模型及局部（墩柱）弹塑性模型，进行静力弹塑性(PUSHOVER)分析。5、桥墩截面尺寸 桥墩立面侧面图6、计算结果6.1 E1地震作用纵、横桥向桥墩强度计算（抗震规范7.3.1）：E1地震顺桥向弯矩包络图桥墩顺桥向最大弯矩对应结果
6、表单元荷载位置轴向 (kN)剪力-y (kN)剪力-z (kN)扭矩(kN*m)弯矩-y (kN*m)弯矩-z (kN*m)79顺桥向I404-8129.5330.67218.48123.63450.5267.8780顺桥向I405-8063.8530.6218.44123.63232.72237.381顺桥向I406-7998.1330.56218.46123.63014.98206.7882顺桥向I407-7932.3730.52218.43123.62797.32176.2783顺桥向I408-7866.5630.48218.25123.62579.86145.884顺桥向I409-78
7、00.7230.45217.89123.62362.71115.3585顺桥向I410-7734.8430.41217.34123.62145.9684.9586顺桥向I411-7668.9230.37216.66123.61929.7154.5987顺桥向I412-7602.9830.31215.9123.61714.0124.488顺桥向I413-753730.25215.1123.61498.8810.8389顺桥向I414-747130.18214.28123.61284.3649.3990顺桥向I415-7404.9830.1213.45123.61070.4988.4991顺桥向I
8、416-7338.9330.01212.57123.6857.34127.5692顺桥向I417-7272.8529.92211.6123.6645.02166.5593顺桥向I418-7206.7629.83210.48123.6433.75205.4594顺桥向I419-7140.6529.74209.16123.6224.08244.2695顺桥向I340-6929.0333.63249.848.563846.82246.8396顺桥向I341-6863.5533.55249.6948.563597.6213.3297顺桥向I342-679833.5249.6448.563348.421
9、79.8698顺桥向I343-6732.433.46249.5648.563099.33146.4299顺桥向I344-6666.7533.44249.3748.562850.41113100顺桥向I345-6601.0533.42249.0248.562601.7579.6101顺桥向I346-6535.333.4248.5248.562353.4646.22102顺桥向I347-6469.5133.37247.8948.562105.6312.88103顺桥向I348-6403.6733.35247.1648.561858.34-19.89104顺桥向I349-6337.7933.3224
10、6.3748.561611.65-13.19105顺桥向I350-6271.8733.28245.5148.561365.641.44106顺桥向I351-6205.9133.24244.5848.561120.3916.07107顺桥向I352-6139.9233.2243.5548.56876.0230.68108顺桥向I353-6073.8933.15242.3948.56632.7345.25109顺桥向I354-6007.8233.1241.0448.56390.8559.78188顺桥向I421-6707.4816.99196.8992.043205.27195.91189顺桥向I
11、422-6642.8416.94196.6492.043009.16179190顺桥向I423-6578.1516.9196.5292.042813.12162.12191顺桥向I424-6513.416.86196.4192.042617.17145.26192顺桥向I425-6448.5916.83196.2392.042421.37128.43193顺桥向I426-6383.7316.8195.9392.042225.8111.64194顺桥向I427-6318.8116.76195.592.042030.5494.88195顺桥向I428-6253.8316.71194.9592.04
12、1835.6678.19196顺桥向I429-6188.816.65194.3292.041641.2461.97197顺桥向I430-6123.716.59193.6392.041447.31106.61198顺桥向I431-6058.5516.51192.8992.041253.96171.57199顺桥向I432-5993.3416.43192.0792.041061.26236.53200顺桥向I433-5928.0616.34191.1692.04869.3301.43201顺桥向I434-5862.7216.25190.1192.04678.23366.24202顺桥向I435-5
13、797.316.15188.9192.04488.19430.95203顺桥向I436-5731.8116.06187.5292.04299.37495.57204顺桥向I438-5302.2748.67190.6834.123116.68362.4205顺桥向I439-5237.5348.62190.3334.122926.96313.82206顺桥向I440-5172.7448.57190.1434.122737.34265.26207顺桥向I441-5107.8848.54189.9934.122547.85216.73208顺桥向I442-5042.9648.51189.7834.12
14、2358.52168.23209顺桥向I443-4977.9848.47189.4734.122169.42119.76210顺桥向I444-4912.9448.43189.0334.121980.6471.32211顺桥向I445-4847.8348.38188.4934.121792.2522.96212顺桥向I446-4782.6748.33187.8734.121604.31-24.94213顺桥向I447-4717.4448.26187.1834.121416.89-12.04214顺桥向I448-4652.1548.19186.4334.121230.0621.23215顺桥向I4
15、49-4586.7948.1185.634.121043.954.5216顺桥向I450-4521.3748.01184.6734.12858.5387.7217顺桥向I451-4455.8847.92183.6134.12674.07120.82218顺桥向I452-4390.3247.83182.4134.12490.68153.84219顺桥向I453-4324.6847.73181.0734.12308.55186.76220顺桥向I455-8968.6355.25192.0424.33119.45396.74221顺桥向I456-8902.9955.18191.7624.32928.
16、33341.6222顺桥向I457-8837.2955.14191.6224.32737.3286.49223顺桥向I458-8771.5455.1191.524.32546.38231.41224顺桥向I459-8705.7555.06191.324.32355.63176.36225顺桥向I460-8639.9255.03190.9824.32165.14121.33226顺桥向I461-8574.0554.99190.5224.31974.9866.34227顺桥向I462-8508.1554.95189.9424.31785.2411.41228顺桥向I463-8442.2154.89
17、189.2824.31595.99-43.37229顺桥向I464-8376.2454.83188.5624.31407.29-81.63230顺桥向I465-8310.2554.76187.7824.31219.2-67.67231顺桥向I466-8244.2254.68186.9424.31031.79-53.18232顺桥向I467-8178.1854.59186.0124.3845.16-38.72233顺桥向I468-8112.1154.5184.9824.3659.45-24.33234顺桥向I469-8046.0154.41183.8224.3474.84-10.04235顺桥向
18、I470-7979.954.32182.5224.3291.664.17236顺桥向I356-7057.927.58255.7553.233912.15217.46237顺桥向I357-6993.3627.52255.6353.233656.97189.98238顺桥向I358-6928.7727.47255.5953.233401.82162.54239顺桥向I359-6864.1227.44255.5153.233146.74135.11240顺桥向I360-6799.4227.42255.3153.232891.84107.71241顺桥向I361-6734.6827.4254.9753
19、.232637.1980.32242顺桥向I362-6669.8827.38254.4653.232382.9252.96243顺桥向I363-6605.0427.36253.8353.232129.125.66244顺桥向I364-6540.1427.33253.153.231875.829.57245顺桥向I365-6475.1927.29252.2953.231623.1536.03246顺桥向I366-6410.1927.26251.4253.231371.1662.81247顺桥向I367-6345.1227.21250.4753.231119.9389.58248顺桥向I368-6
20、279.9927.17249.4153.23869.58116.31249顺桥向I369-6214.7927.12248.2153.23620.23142.99250顺桥向I370-6149.527.06246.8353.23372.08169.63251顺桥向I372-6940.8528.41260.6452.693973.44221.19252顺桥向I373-6876.2628.34260.5252.693713.35192.88253顺桥向I374-6811.6128.3260.4852.693453.3164.61254顺桥向I375-6746.928.27260.3952.69319
21、3.32136.36255顺桥向I376-6682.1328.24260.252.692933.51108.13256顺桥向I377-6617.3128.22259.8552.692673.9779.91257顺桥向I378-6552.4428.21259.3552.692414.7951.72258顺桥向I379-6487.528.18258.7152.692156.0823.6259顺桥向I380-6422.5128.16257.9752.691897.9111.77260顺桥向I381-6357.4528.12257.1652.691640.3638.97261顺桥向I382-6292.
22、3328.08256.2752.691383.566.35262顺桥向I383-6227.1428.04255.352.691127.4293.72263顺桥向I384-6161.8727.99254.2252.69872.24121.04264顺桥向I385-6096.5227.9425352.69618.09148.32265顺桥向I386-6031.0827.89251.5952.69365.16175.55266顺桥向I388-6591.2715.33266.347.584036.86156.5267顺桥向I389-6525.9415.25266.1947.583771.11141.2
23、9268顺桥向I390-6460.5415.2266.1447.583505.38126.12269顺桥向I391-6395.0815.16266.0647.583239.75110.98270顺桥向I392-6329.5615.14265.8647.582974.2895.86271顺桥向I393-6263.9815.12265.547.582709.0880.76272顺桥向I394-6198.3415.126547.582444.2565.67273顺桥向I395-6132.6515.08264.3647.582179.950.64274顺桥向I396-6066.9115.05263.6
24、147.581916.136.11275顺桥向I397-6001.1115.02262.7947.581652.9459.33276顺桥向I398-5935.2614.98261.8947.581390.4991.57277顺桥向I399-5869.3714.94260.9147.581128.86123.84278顺桥向I400-5803.4314.9259.8247.58868.18156.08279顺桥向I401-5737.4514.85258.5847.58608.63188.27280顺桥向I402-5671.4214.8257.1647.58350.64220.43桥墩顺桥向强度表项目构件受力性质（kN-m）（kN-m）（kN）-抗力（kN）是否满足最大弯矩及对应内力下拉偏
