This article discusses the problem in three aspects: relation between pensionable age and Chinese average life span and healthy expectancy life span; pensionable age around the world; effects on labor market.

本文分析了幾個被廣泛關注的因素：中國人口平均壽命與健康預期壽命變化在线免费播放黄色视频，世界的退休年齡變化趨勢以及退休年齡變化對于勞動力市場的影響。

In this paper, basted on the sum-up and investigation of simulation calculation of long-span bridge construction in nation and international, the detailed approach of imitated calculation of long-span CFST arch bridge is given out, and the reason why the general backward analysis is not suitable for the application of the rib-hoisting of CFST arch bridge is analyzed. And an applied method for forward analysis based on iterative theory is put forward.

本論文通過對國內外橋梁施工仿真計算成果的總結和研究国产午夜福利无码精品大秀在线，給出了大跨度鋼管混凝土拱橋仿真計算的具體步驟日韩区小视频.免费，分析了一般的倒退仿真計算方法不適合應用于鋼管混凝土拱橋吊裝的原因，并為此提出了基于迭代理論的前進分析實用方法人人摸人人爱人人操。

Now this type of bridge is applied to more and more medium and small-span bridges in cities, even large-span bridges over rives.

目前在我國鸥美理论在线，越來越多的城市中小型橋梁，乃至跨江河的大橋都采用這種橋型方案欧美色亚洲。

With the development of science and the improvement of the suspend capacity, there has been a noticeable trend in the enlargement of span range and the standardization of medium and small-span bridge design. But the test researches and the whole loading process analysis on the simply supported continuous P.C.

目前簡支連續(xù)預應力混凝土多箱式橋梁的應用日趨廣泛网站看黄，隨著科技的進步及吊裝能力的提高，跨徑范圍的增大以及在中小跨徑領域內設計標準化的趨勢十分明顯日韩电影精品午夜在线播放。

As a compress-bend structure, with increasing of the span, length slender ratio and carrying load of arch increase, lateral rigidity and width span ratio of arch ring minish relatively. During construction and service stages, lateral stability becomes more important and a control factor of arch bridge design.

拱肋作為壓彎結構一级黄色片在线观看，隨著跨徑的增大，桿件的長細比及所承受的荷載也隨之增大女人被爽到呻吟的网站，拱圈橫向剛度欧美三级手机在线看、寬跨比相對減小，在施工階段及使用階段橫向穩(wěn)定問題特別突出日本强伦姧人妻一区二区，常常成為拱橋設計的控制因素日韩午夜三级片。

As a structure that is compressed and bended, with increasing of the span, length slender ratio and carrying load of arch increase, lateral rigidity and width span ratio of arch ring minish relatively. During constructing and bring to bear, lateral stability becomes especially severity and a control factor of arch bridge design.

拱作為壓彎結構亚洲激情国产一区精品，隨著跨徑的增大，桿件的長細比及所承受的荷載也隨之增大十八女毛片一区二区三区，拱圈橫向剛度一级特黄AAA大片兔费app、寬跨比相對減小，在施工階段及使用階段橫向穩(wěn)定問題特別突出国产啊a片视频在线，常常成為拱橋設計的控制因素免费的毛片网站。

The article is based on the 6m-span girder bridge in the Country Road 312, using ANSYS to analyze the model of no bearing and simple-supported plate girder bridge, which with width-span ratio of 2 and continuous deck.

以國道312線跨徑6m的板梁為例，用ANSYS對寬跨比為2且橋面連續(xù)的無支座簡支板梁橋進行模態(tài)分析国产精品h片在线观看网站。

To reduce the vibration from blasting and ensure the safety of flood-control wall,the controlled blasting program of non-electric defonation circuit,span-by-span collapse and multilayer delay was adopted.

為減少拆除建筑結構倒塌著地振動亚洲色大网站www永久网站，確保近側防汛墻的安全，采用了非電復式起爆網路日韩精品妓女网页在线，逐跨倒塌或多層爆口延期的控制爆破方案人人干人人操人人舔。

The paper discussed proportion between side span and middle span in three spans prestressed continuous box beam bridge.

本文對三跨預應力連續(xù)箱梁橋的邊跨與中跨比例問題進行了初步的探討。

The one that need to emphasize is, advanced science and technology brings the extension of people's life-span, if beneficiary that the life-span lengthens' thinking stops but can only be looked after, Then even his unwilling death society will execute the bill of euthanasia , Old people's existence can't deprive children's existence .

需要強調的是，高技術帶來人壽命的延長，倘若壽命延長之受益人思維停頓而只能受照顧又黄又湿的网站，那么即使他不愿死亡社會也將強制執(zhí)行安樂死的法案一级大黄片电影，老年人的生存不能剝奪兒童的生存免费在线观看人成视频。