大连市马栏河星海大桥计算书Word下载.docx
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大连市马栏河星海大桥计算书Word下载.docx
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四.桥梁总体布置及构造
1.上部结构形式:
马栏河星海大桥位于马栏河出海口,连接星海广场与滨海路。
根据设计委托书的要求与多种方案的反复选择论证,经有关部门领导批准,确定本桥结构为变高度的预应力砼T型刚构桥。
根据桥址处河床断面测量数据及委托书的要求,确定桥梁总长为123.8m,每跨净跨径为60.75m。
桥的两端靠近岸边主梁的下方,设宽为2米的人行通道。
根据桥梁横断面布置要求,主梁采用现浇预应力砼单箱5室箱形截面,梁宽25m,梁高为1.8~3.3m,悬臂宽度为2.5m,箱梁顶板厚20cm,底板厚度从20cm加厚到50cm。
为满足桥下通航要求与主梁根部的承载力要求,主梁竖曲线半径为1800m,以增加河中间位置的通航能力。
T构的根部张拉横向预应力筋。
桥面铺装采用8cm厚的沥青混凝土。
2.下部结构形式:
桥址处的地形起伏较大,地貌单元属于回填的海漫滩,场地的地质条件主要由杂填土、砂卵石、卵石、粘土混碎石、强风化石英岩板岩互层组成。
根据地质资料及桥址处的地形条件,下部结构采用桩径为φ1.4m的钻孔灌注桩基础,0#、2#台处为单排5根桩。
1#墩处为两排6根桩,上设2.5m厚的承台。
桩长均需根据地质钻探情况而定,桩长估计为20m左右。
桥台处安装板式橡胶支座。
五.建筑材料
1.钢筋采用I,II级钢筋,应符合国标GB13013-91和GB1499-91。
2.预应力筋采用φj15.24,强度为1860Mpa的低松弛钢铰线,应符合ASTMA416-92技术标准。
锚具采用HVM型号,并采用相应配套的锚下垫板及螺旋筋,力筋管道采用镀锌波纹管。
3.主梁采用C50混凝土,墩及承台采用C30砼,桥墩部分的砼达到抗冻F300。
桩基采用C25,桥面铺装采用8cm厚的沥青混凝土(5cm粗粒,3cm中粒)。
六.构计算模型和荷载
1.计算模型
整体受力计算按平面杆系结构来分析。
其中主梁单元号为1~122。
2.荷载及其组合
计算荷载如下:
1)自重
2)预应力
3)活载
行车道:
4车道,汽-超20级
人行道:
3.5KN/m2
4)整体温差:
降温35℃;
升温15℃
5)桥面日照温差+5℃
荷载组合如下:
组合Ⅰ:
自重+预应力+汽车+人群+砼收缩+砼徐变
组合Ⅱ:
自重+预应力+汽车+人群+砼收缩+砼徐变+温度影响力
七.计算结果
1.主梁应力
主梁应力如表一、表二所示,从图中数据可知,主梁应力满足规范要求。
表一荷载组合I时主梁应力(Mpa)
--------------------------------------------------
单上缘下缘
元最大最小最大最小
号压应力压应力压应力压应力
--------------------------------------------------
11.711.716.056.05
11.251.216.636.59
21.181.126.736.62
22.552.115.545.04
32.522.095.655.16
33.793.034.553.68
43.793.034.563.70
44.953.903.542.33
54.953.903.562.35
56.034.702.621.09
65.564.235.754.22
66.074.485.473.63
76.024.435.653.81
76.885.064.922.80
86.865.045.002.88
87.675.624.311.94
97.665.624.341.97
98.386.133.741.13
107.905.666.904.29
108.075.636.924.09
118.015.577.164.33
118.646.026.633.59
128.605.996.763.73
129.276.506.172.95
139.256.486.243.03
139.927.015.632.24
149.906.995.692.30
1410.577.525.081.53
1510.107.058.204.65
1510.197.028.234.54
1610.146.978.424.73
1610.617.338.004.18
1710.587.308.094.27
1711.017.627.723.77
1811.007.617.753.80
1811.347.857.463.40
1911.347.857.483.42
1911.598.027.283.12
2011.598.027.293.14
2011.758.127.182.94
2111.758.117.192.96
2111.838.147.162.86
2211.858.167.072.78
2211.858.127.122.79
2311.888.157.012.67
2311.798.047.142.78
2411.808.057.102.74
2411.627.877.312.95
2511.627.877.292.92
2511.367.627.593.23
2611.377.637.563.20
2611.027.307.943.61
2711.037.317.913.58
2710.596.918.374.09
2810.606.928.334.04
2810.116.488.854.62
2910.136.508.784.56
299.656.079.285.12
309.696.129.114.95
309.325.819.475.37
319.385.869.245.15
319.526.098.724.81
329.806.375.922.01
329.305.976.172.48
339.305.986.142.44
338.705.506.472.99
348.715.516.422.94
348.014.966.823.56
358.065.016.653.39
357.694.806.673.64
368.165.263.91.88
367.284.564.501.70
377.294.564.481.68
376.363.815.092.53
386.383.844.992.43
385.513.145.533.19
395.533.175.403.06
395.012.805.613.45
405.213.003.371.22
404.182.094.152.14
414.182.094.142.13
413.141.154.913.03
426.094.104.422.54
425.553.634.712.92
435.733.814.552.76
435.013.125.053.31
445.543.652.72.98
444.482.613.561.86
454.492.623.551.86
453.451.594.362.70
463.451.604.362.70
462.43.535.183.50
475.093.194.562.88
474.292.355.163.46
484.422.475.123.42
483.421.425.884.15
495.933.945.353.62
495.233.185.824.07
505.363.315.794.04
504.412.296.484.69
514.442.326.474.68
513.511.327.125.29
525.973.786.594.76
525.263.007.035.17
535.373.117.005.14
534.412.087.645.74
544.452.127.635.73
543.531.138.226.29
555.973.577.685.75
555.282.838.066.10
565.412.968.026.06
564.572.048.526.53
574.612.098.516.52
573.781.208.986.96
583.801.228.986.96
583.02.389.407.36
593.04.409.407.35
592.30-.399.797.72
602.32-.379.787.72
601.61-1.1310.148.05
611.61-1.1310.138.05
61-.35-3.3511.829.54
62-.45-3.4511.909.62
621.51-1.2310.218.13
631.53-1.2110.218.13
632.23-.469.867.79
642.22-.479.867.80
642.96.329.487.43
652.94.309.487.43
653.721.149.067.04
663.701.129.077.04
664.532.018.596.60
674.511.998.606.61
675.362.918.096.13
685.342.898.106.14
686.253.867.545.61
696.233.847.555.61
697.184.856.945.05
707.144.816.965.06
708.125.866.314.45
718.015.746.354.48
718.746.555.894.07
726.274.086.434.60
727.225.105.773.98
737.165.045.794.00
738.126.075.103.35
747.875.825.173.42
748.306.304.943.22
753.281.296.004.27
754.282.335.243.54
764.152.215.283.58
764.953.054.693.01
772.29.395.313.63
773.311.454.492.83
783.311.454.492.83
784.342.473.691.99
794.342.473.691.99
795.393.502.851.11
804.862.975.183.44
805.593.664.692.90
815.403.484.853.06
815.943.954.562.68
822.991.005.053.17
824.031.944.282.27
834.031.944.292.29
835.072.853.521.36
844.862.655.763.60
845.393.025.553.21
855.362.995.683.34
856.243.695.142.58
866.213.665.242.68
867.144.414.631.83
877.144.414.651.85
878.015.124.061.03
887.554.656.823.79
887.924.866.803.54
897.874.826.983.72
898.575.386.573.09
908.565.366.633.15
909.175.856.292.60
919.165.846.332.63
919.676.246.072.16
929.395.968.874.97
929.255.749.395.30
939.205.689.625.52
939.575.999.255.09
949.525.959.425.26
9410.016.388.924.70
959.996.368.994.76
9510.496.818.464.18
9610.486.808.514.22
9610.927.208.043.71
9710.917.198.073.74
9711.267.527.683.33
9811.257.527.713.36
9811.527.787.413.04
9911.527.777.433.07
9911.707.967.212.85
10011.667.927.352.99
10011.768.047.212.88
10111.738.017.332.99
10111.748.057.282.98
10211.748.067.262.96
10211.678.037.293.05
10311.678.047.273.04
10311.517.947.383.23
10411.517.957.373.21
10411.277.787.563.50
10511.277.787.543.48
10510.937.547.823.88
10610.947.557.803.85
10610.527.248.164.35
10710.547.278.074.26
10710.086.928.484.80
10810.136.978.294.61
10810.046.998.264.72
10910.517.465.141.59
1099.856.945.752.36
1109.876.965.682.30
1109.206.446.293.08
1119.226.466.223.01
1118.565.956.813.78
1128.595.996.673.64
1127.975.547.204.37
1138.035.606.964.14
1137.875.636.934.33
1148.346.103.771.17
1147.635.594.372.01
1157.645.604.341.98
1156.845.025.022.92
1166.865.044.942.84
1166.004.425.673.84
1176.044.465.493.66
1175.554.225.774.24
1186.014.692.641.11
1184.943.893.572.36
1194.943.893.552.34
1193.783.034.563.71
1203.783.034.553.69
1202.522.095.655.16
1212.552.115.535.05
1211.181.126.726.63
1221.251.216.636.59
1221.711.716.056.05
表二荷载组合I时主梁应力(Mpa)
22.602.115.544.98
32.582.095.655.10
33.883.034.553.57
43.883.034.563.59
45.093.903.542.17
55.093.903.562.19
56.204.702.62.88
65.744.235.754.01
66.284.485.473.38
76.234.435.653.56
77.145.064.922.51
87.125.045.002.59
87.965.624.311.60
97.955.624.341.63
98.716.133.74.74
108.245.666.903.90
108.445.636.923.66
118.385.577.163.89
119.056.026.633.11
129.025.996.763.24
129.726.506.172.42
139.706.486.242.50
1310.417.015.631.66
1410.406.995.691.73
1411.107.525.08.90
1510.637.058.204.03
1510.777.028.233.87
1610.726.978.424.05
1611.227.338.003.47
1711.207.308.093.55
1711.667.627.723.00
1811.667.617.753.03
1812.047.857.462.58
1912.037.857.482.60
1912.338.027.282.26
2012.328.027.292.28
2012.538.127.182.04
2112.528.117.192.05
2112.648.147.161.91
2212.678.167.071.83
2212.708.127.121.79
2312.738.157.011.67
2312.688.047.141.73
2412.698.057.101.69
2412.557.877.311.85
2512.567.877.291.83
2512.337.627.592.09
2612.347.637.562.06
2612.037.307.942.42
2712.047.317.912.39
2711.656.918.372.85
2811.666.928.332.81
2811.216.488.853.34
2911.226.508.783.28
2910.786.079.283.79
3010.826.129.113.62
3010.505.819.474.00
3110.555.869.243.77
3110.736.098.723.43
3211.016.375.92.63
3210.545.976.171.09
3310.545.986.141.06
339.965.506.471.60
349.985.516.421.55
349.304.966.822
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