1、西南交通大學土木工程西南交通大學土木工程橋梁工程課程設計――預應力混凝土簡支梁橋――預應力混凝土簡支梁橋設計計算書姓名：學號：班級：指導教師：3.正常使用極限狀態(tài)下荷載長期效應組合.....................................144.持久狀況應力計算時的荷載效應組合.........................................155.短暫狀況應力計算時的荷載效應組合............

2、.............................15第四章預應力鋼束設計....................................................................................16一、1號梁鋼束估算...................................................................................1

3、61.按正截面抗彎承載力估算.............................................................162.按正常使用狀態(tài)估算.....................................................................163.預應力鋼筋估算值...................................................

4、......................17二、1號梁鋼束的布置...............................................................................17三、預應力損失計算..................................................................................181.預應力鋼束與管道壁之

5、間的摩擦損失.........................................192.由錨具變形、鋼筋回縮和接縫壓密引起的預應力損失.............193.混凝土彈性壓縮引起的預應力損失.............................................204.預應力鋼筋的應力松弛引起的預應力損失.................................205.混凝土收縮和徐變引起

6、的預應力損失.........................................21四、各階段的有效預應力及鋼束效應......................................................22第五章主梁驗算............................................................................................

7、....23一、承載能力驗算......................................................................................231.正截面抗彎承載力驗算...................................................................232.斜截面抗剪承載力驗算.........................

8、..........................................24二、抗裂性驗算..........................................................................................241.正截面抗裂性驗算...................................................................

9、........242.斜截面抗裂性驗算...........................................................................25三、持久狀況預應力混凝土構件應力驗算..............................................261.混凝土正截面壓應力和預應力鋼筋拉應力驗算。.......................262.混凝土主壓應力

10、和主拉應力驗算...................................................27四、短暫情況預應力混凝土構件應力驗算..............................................28五、剛度驗算........................................................................................

11、......29第六章結(jié)論........................................................................................................30第七章參考文獻..............................................................................................