20m简支装配式后张法预应力混凝土空心板配束计算(手算).doc
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1、anti-concentrated immune period full implementation whole village advance work, participate in whole village advance work concentrated immune of village level epidemic prevention member per person daily grants 100 Yuan, district animal health supervision by will organization personnel for immune den
2、sity, immune archives, situation on Township, and village and the farmers for has field check and assessment, found problem, timely processing; while, tie good Township implementation good the control measures, ensure major animal blight control work in place. Four, there is a problem (a) prevalence
3、 of animal diseases is complex I is located in the citys political, economic and cultural center, is the flow of livestock and poultry and its products distribution center, complex animal epidemic diseases, pathogens, mobility. One is convenient, cross-province and cross State and municipal transpor
4、tation of livestock and poultry and its products become the norm, cross county, imported cases are on the rise. Second, higher risk major animal disease outbreaks occur, from pathogen surveillance and epidemiological investigations in recent years, foot and mouth disease and highly pathogenic avian
5、influenza, highly pathogenic blue-ear pig disease hidden large outbreaks, goat pox. Third, free-range livestock farmers share in the autonomous region, controlling and cleaning measures are difficult to implement, and porcin circle virus, Parvovirus, Pseudorabies pathogen distribution and disease pa
6、thogen mixed infection atypical, more prominent. Four rabies, tuberculosis in dairy cows and other zoonotic diseases are on the rise, studies show that 70% animal diseases can be transmitted to humans, 75% of human emerging infectious diseases from animal or animal-derived foods, does not enhance th
7、e prevention and control of animal epidemics, would seriously endanger public health and safety. (B) animal disease control, challenging folks . Constraints have become more prominent. (C) to strengthen the team construction of present, my basic veterinary facilities and team weaknesses, staff short
8、age, low technology, social services are still not high, animal husbandry and veterinary technicians and veterinary technical services and not adapted to management needs, live animal cross-district allocation and market access mechanism is not perfect, animal disease control still faces many diffic
9、ulties and problems. (D) the coordination segment of the sector needs to be strengthened the township (town) awareness and organization in place, with no support among community cadres, not fulfilling publicity and mobilization responsibilities farmers hear from immunization, prevention of sub is a
10、farmer who is not at home, cant let epidemic prevention. 2016 and 1 to complete the major animal diseases by higher authorities compulsory immunization task. 2, complete antibody superior monitoring and pathogen monitoring tasks. 3, complete disease epidemiology supervisor tasks. 4, animal disease m
11、ortality survey tasks assigned by the superior. 5, serum sample tasks are assigned to the Township, incorporated into the Regional Bureau of animal husbandry and veterinary medicine annual target assessment within the framework of the animal husbandry and veterinary station in villages and towns. 6,
12、 complete, update the Township and village veterinary cold chain facilities. 7, adoption and implementation of animal disease control medium-and long-term planning. 8, develop village-level epidemic prevention staff appraisal management and supervise预应力混凝土公路桥梁通用设计图成套技术 20m简支预应力混凝土空心板预应力混凝土公路桥梁通用图设计成
13、套技术通用图设计计算书20m简支装配式后张法预应力混凝土空心板配束计算(手算)(高速公路和一级公路) 设计计算人: 日期: 复核核对人: 日期:单位审核人: 日期:项目负责人: 日期:编制单位:湖南省交通规划勘察设计院编制时间:二六年三月the implementation of the Township animal husbandry and veterinary medicine. In 2016, we will further improve, fine control, and adhere to the 24 words control policy and further co
14、nsolidate the Foundation, reinforcing the responsibility, innovative mechanisms to more solid style to hold and practice measures for major animal epidemic prevention and control work more success.45湖南省交通规划勘察设计院 目 录1 计算依据与基础资料11.1 标准及规范11.1.1 标准11.1.2 规范11.1.3 参考资料11.2 主要材料11.3 设计要点22 横断面布置22.1 横断面布
15、置图22.2 预制板截面尺寸33 汽车荷载横向分布系数、冲击系数的计算33.1 汽车荷载横向分布系数计算33.1.1 跨中横向分布系数33.1.2 支点横向分布系数53.1.3 车道折减系数53.2 汽车荷载冲击系数计算53.2.1汽车荷载纵向整体冲击系数53.2.2 汽车荷载的局部加载冲击系数54 作用效应组合64.1 作用的标准值64.1.1 永久作用标准值64.1.2 汽车荷载效应标准值74.2 作用效应组合104.2.1 基本组合(用于结构承载能力极限状态设计)104.2.2 作用短期效应组合(用于正常使用极限状态设计)114.2.3 作用长期效应组合(用于正常使用极限状态设计)114
16、.3 截面几何特性计算145 持久状态承载能力极限状态计算165.1 正截面抗弯承载能力165.2 斜截面抗剪承载力验算175.2.1 验算受弯构件抗剪截面尺寸是否需进行抗剪强度计算176 持久状况正常使用极限状态计算196.1 预应力钢束应力损失计算206.1.1 张拉控制应力206.1.2 各项预应力损失206.2 温度梯度截面上的应力计算266.3 抗裂验算276.3.1 正截面抗裂验算276.3.2 斜截面抗裂计算306.4 挠度验算326.4.1 汽车荷载引起的跨中挠度326.4.2 预制板是否设置预拱值的计算337 持久状态和短暂状况构件应力计算357.1 使用阶段正截面法向应力计
17、算357.1.1 受压区混凝土的最大压应力357.1.2 受拉区预应力钢筋的最大拉应力367.2 使用阶段混凝土主压应力、主拉应力计算377.3 施工阶段应力验算398 桥面板配筋计算418.1 荷载标准值计算418.1.1 计算跨径418.1.2 跨中弯矩计算428.1.3 支点剪力438.2 极限状态承载力计算438.2.1 荷载效应组合计算438.2.2 正截面抗弯承载力448.2.3 斜截面抗剪承载力448.3 抗裂计算449 铰接板的混凝土铰缝剪力验算45预应力混凝土公路桥梁通用设计图成套技术通用图计算(20m简支预应力混凝土空心板)1 计算依据与基础资料1.1 标准及规范1.1.1
18、 标准 跨径:桥梁标准跨径20m;计算 跨径(正交、简支)19.26m;预制板长19.96m 设计荷载:公路级 桥面宽度:(路基宽23m,高速公路),半 幅桥全宽11.25m 0.5m(护栏墙)+10.25m(行车道)+ 0.5m(护栏墙)11.25m 结构重要性系数: 1.1 环境条件类,计算收缩徐变时,考虑存梁期为90天1.1.2 规范 公路工程技术标准JTG B01-2003 公路桥梁设计通用规范JTG D60-2004(简称通规) 公路钢筋混凝土及预应力混凝土桥涵设计规范JTG D62-2004(简称预规)1.1.3 参考资料公路桥涵设计手册桥梁上册(人民交通出版社2004.3)1.2
19、 主要材料1)混凝土:预制板及铰缝为C50、现浇铺装层为C40、护栏为C302)预应力钢绞线:采用钢绞线,3)普通钢筋:采用HRB335,1.3 设计要点1)本计算按后张法部分预应力混凝土A类构件设计,偏安全的,桥面板及铺装层混凝土不参与截面组合作用;2)预应力张拉控制应力值。3)环境平均相对湿度RH=80;4)计算混凝土收缩、徐变引起的预应力损失时传力锚固龄期为7d;5)存梁时间为90d。2 横断面布置2.1 横断面布置图(单位:mm)2.2 预制板截面尺寸 边、中板毛截面几何特性 表21板号边板中板几何特性面积抗弯惯性矩截面重心到顶板距离面积抗弯惯性矩截面重心到顶板距离0. 72100.0
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