合理拱轴线确定方法探讨-李井辉

110166从悬索结构与具有合理拱轴线的拱结构受力相似的角度出发，将悬索结构在荷载作用下的线形沿水平面镜像后作为拱结构的压力线，以5次多项式拟合该压力线，从而确定出受力合理的拱轴线。拱轴线;悬索;压力线U442．5+3A1673－6052201402－0013－03、、－L/2L/2L。、。5。100FH1y=－MqFHxd2ydx2=－qxFH1y—x—FH—qx—。1、。2dxd2zdx2=－qxH2z—x—H—qx—。212、·31·2。23、4342。5。3midasCivil。midasCivil1、、、、。2“//”。3“”。4、。5。6、、“/”“”0。4170.6mf/L=1/5m=1.1681.8m。3.0m。5。511N1N1’N2N2’N3N3’N4N4’N5N5’N6N6’N7N7’kN－795－641－666－666－666－666－666midasCivil2。627、·41·20132XmYmYmemYmem10.000.0000.0000.0090.000－0.00622.050.0560.0100.0100.0580.04334.050.2230.2300.0080.226－0.01046.050.5030.4680.0060.4920.01658.300.8950.9160.0040.901－0.026610.551.4001.3840.0011.4220.024712.802.0182.062－0.0032.054－0.025815.052.7502.760－0.0062.8000.018917.303.5983.669－0.0093.661－0.0301019.554.5634.598－0.0114.6390.0131121.805.6455.739－0.0115.734－0.0291224.056.8466.901－0.0126.9430.0121326.308.1688.268－0.0098.257－0.0321428.559.6139.657－0.0069.659－0.0171530.8011.00111.1140.00111.1280.0001633.0512.48912.5890.00812.6300.0281735.3014.12014.1200.01514.1210.0040.1280.0150.0431.xy62．5y=－0.0144－0.00191x+0.0156x^2－0.000381x^3+0.0000149x^4－0.000000211x^58。2。578、。1.M.1983.2.M.1997.3.M.1982.4.M.2006.5.D．2003.DiscussiononDeterminationMethodofＲeasonableArchAxisAbstractFromtheviewofsimilartolerancebetweensuspensionstructureandarchstructurewithreasonablearchaxisthelinearwhichformsbysuspensionstructureundertheeffectofloadshallberegardedaspressurelineofarchstructureafterhorizontalmirrorimage.Calculatethepressurelineby5orderpolynomialstomakesurethearchaxiswithreasonabletolerance.KeywordsArchaxisSpanwirePressureline·51·2