附件二方案二屋盖结构选型及主要计算结果

附件二（方案二）屋盖结构选型及主要计算结果一、结构选型及主要构件本工程屋盖结构由14榀直接支承于基础之上的巨型空腹门式刚架组成，每榀间距为4米。刚架梁柱均为4肢组合的格构式构件。其中，格构横梁尺寸为4.0米x2.55米，上下弦均采用φ203的圆形钢管，上下弦间的腹杆则根据受力的不同由φ102x5到φ68x6不等。上下弦平面内的斜腹杆从φ146x10到φ83x6不等，直腹杆则采用H100x75x4.0x6的H型钢（同时可以兼作屋面系统和马道结构的檩条）,门式刚架的格构柱平面尺寸为4.0x2.45米，4肢均为φ245x7.0的钢管混凝土构件，斜向缀条为φ102x5和φ114x5两种，横向缀条也采用H100x75的H型钢（同时兼做墙面结构的墙梁）。为了控制在竖荷载作用下的挠度，对门式刚架长短跨最不均匀处施加了部分预应力，预应力钢筋采用φj7*55的钢索，控制张拉应力为破断应力的1/3到1/4之间。通过施加部分预应力，可以使结构的最大挠度比控制在1/420左右，小于《门式刚架轻型房屋技术规范》（CECS102:2002）中所规定的1/180的限值。相邻的两榀刚架之间在下弦平面内设置满堂布置的面内支撑(φ102x6)，使相对分散的平面门式刚架结构形成为一个较为紧密的整体。主要计算结果见附图材料表见附表二、结构分析及主要计算结果附图1：振型1(2.09535Hz)附图2：振型2(2.1253Hz)附图3：振型3(2.3346Hz)附图4：振型4(2.4279Hz)附图5：振型5(2.54025Hz)附图6：振型6(2.66438Hz)附图7：振型7(2.84631Hz)附图8：振型8(2.88015Hz)附图9：振型9(2.89421Hz)附图10：振型10(3.02562Hz)附图11：立面示意图附图12：恒+活+雪的柱脚反力附图13：X向位移（X向风荷载工况）附图14：Y向位移（Y向风荷载工况）附图15：Z向位移（X向风荷载工况）附图16：Z向位移（Y向风荷载工况）附图17：Z向位移（半跨活荷载+雪载工况1）附图18：Z向位移（半跨活荷载+雪载工况2）附图19：Z向位移（恒荷载工况）附图20：Z向位移（满跨活荷载+雪载工况）附图21：Z向位移（预应力工况）材料表质量体积长度数目类型截面kgmm3mm 1:PIP245x7..09.47E+0041.21E+1102.31E+006904梁空心钢管2:PIP114x5..03.61E+0044.60E+0092.69E+006916桁架空心钢管3:PIP203x6..03.74E+0044.76E+0091.28E+006512梁空心钢管4:PIP203x6..51.40E+0041.78E+0094.45E+005180梁空心钢管6:PIP203x7..51.01E+0041.29E+0092.79E+005112梁空心钢管7:PIP203x8..01.08E+0041.38E+0092.81E+005100梁空心钢管8:PIP203x9..01.49E+0041.90E+0093.46E+005140梁空心钢管9:PIP203x100.04.91E+0046.25E+0091.03E+006416梁空心钢管10:PIPP2033x110.01.99E+0042.53E+0093.51E+005140梁空心钢管11:PIPP2033x114.04.16E+0045.30E+0096.38E+005256梁空心钢管12:PIPP2033x116.09.68E+0031.23E+0091.31E+00548梁空心钢管13:PIPP1522x55.09.73E+0031.24E+0095.37E+005168桁架空心钢管14:PIPP83x6..54.37E+0035.57E+0083.56E+005112桁架空心钢管15:PIPP73x6..04.41E+0035.62E+0084.45E+005140桁架空心钢管16:PIPP68x6..07.75E+0039.87E+0088.45E+005276桁架空心钢管17:PIPP83x4..04.88E+0036.21E+0086.26E+005188桁架空心钢管18:PIPP1022x77.01.51E+0041.93E+0099.23E+055312桁架空心钢管19:PIPP1022x66.02.77E+0043.53E+0091.95E+006461桁架空心钢管20:PIPP95x6..51.59E+0042.03E+0091.12E+006388桁架空心钢管21:PIPP83x6..01.80E+0042.29E+0091.58E+006532桁架空心钢管22:PIPP57x5..08.80E+0031.12E+0091.37E+006464桁架空心钢管23:PIP102x5..04.90E+0046.25E+0094.10E+0061270桁架空心钢管24:H1000x75xx4.00x666.01E+0047.66E+0096.08E+0062300梁H型钢25:PIPP1211x77.55.79E+0037.38E+0082.76E+00588桁架空心钢管26:PIPP1333x77.51.54E+0041.96E+0096.62E+005208桁架空心钢管27:PIPP1400x88.01.85E+0042.36E+0097.11E+005224桁架空心钢管28:PIPP1466x110.01.22E+0041.55E+0093.62E+005112桁架空心钢管29:c24452.43E+0051.01E+1112.41E+006944梁实心圆形30:c20032.67E+0041.11E+1104.23E+005168梁实心圆形31:c15522.04E+