Increasing the roughness of fishway, using another lower opening in the spillway of the check dam to get more flow in fishway, using upside down trapezoidal cross section steel bar to substitute circular cross section can improve the functions of the fishway.

提出魚道內(nèi)增加粗糙度黄色网站免费入囗、利用防砂壩開口低槽增加魚道內(nèi)水量、建議改用倒梯形斷面鋼棒取代圓形斷面熟女操B视频，并配合結(jié)論說明魚道設(shè)計(jì)上之缺失與建議修正方法bbixx国产av。

The prestressed concrete simple beam compares reinforced concrete beam to compare, the merit includes: Uses the high marking concrete, section minification, the dead weight reduces, may increase the spanning ability; Uses the high strength steel bar, may save the steel products; But raises the sorghum body large scale the crack resistance, increases beam's durability, the concrete total cross-section bearing, has fully displayed the concrete resistant to compression performance superiority, also enhanced Liang's rigidity.

預(yù)應(yīng)力混凝土簡支梁較鋼筋混凝土梁相比，優(yōu)點(diǎn)有：采用高標(biāo)號混凝土久久婷婷香蕉热狠狠综合，截面尺寸減小国产吞精口爆一区二区，梁體自重減輕，可以增大跨越能力国产乱伦视频免费观看；采用高強(qiáng)度的鋼筋国产高中三级视频，可節(jié)約鋼材；可大幅度提高梁體的抗裂性亚洲专区第一页，增加梁的耐久性最新国产小视频在线观看，混凝土全截面受壓，充分發(fā)揮了混凝土抗壓性能的優(yōu)勢又大又硬视频，也提高了梁的剛度波罗一级黄色视频。

The R/C frame structures were modeled with bar system and the column was modeled with multi-springs. The concrete and steel bars in column were considered as springs in order to reflect the coupling influence between the axial force and the moment-rotation relationship, the hysteresis of springs is based on the material properties and the rotation of column section is followed the plane assumption. The moment-rotation of beam section was modeled with trilinear hysteresis model.

混凝土框架分析模型采用桿系模型，其中柱采用多彈簧模型91亚洲国产在人线播放午夜，柱端的混凝土和鋼筋作為彈簧考慮以便反映柱軸力與彎矩－曲率的耦合關(guān)系免费无码在线小视频，彈簧的滯回關(guān)系根據(jù)材料特性確定，柱截面的轉(zhuǎn)動(dòng)符合平截面假定日韩精品试看把，梁截面彎矩－轉(zhuǎn)角關(guān)系采用三折線滯回關(guān)系模型天天天色色色。

With the advancement of technology, people's growing demand for the bar, its accuracy is also getting higher and higher, before people parallel roller leveler straightening tubes, rods and other circular cross-section of the build, round-wood in hand Direct the process of rotation is easy to produce, and only straightening roundwood roll axis perpendicular to the longitudinal section on the bend.

隨著科技的進(jìn)步，人們對棒材的需求量越來越大国产A片址一网、對其精度要求也越來越高，以前人們采用平行輥矯直機(jī)矯直管黄色网站国产精品、棒等圓形斷面條材亚洲sanji在线，圓材在矯直過程中容易產(chǎn)生自轉(zhuǎn)現(xiàn)象www.99riav.m3u8，并且只能矯直圓材垂直于輥軸的縱向剖面上的彎曲。

The objectives of this paper were to investigate the simulation and design of continuous multiple-station rolling forming process for a U-Section Steel Bar by CAE software-DEFORMTM Due to the limitation of elements number using a short strip 120mm went through all the stations to simulate the real continuous rolling forming on factory The roller gap was fixed as 0 30mm roll speed was 20 rad/sec and progressive angles were all equal for each rolling process which were the formed angle divided by by the number of station Three rolling processes were selected with 6 9 and 12 stations respectively During simulation processes two cases occurred Case A the strip was through a single station Case B the strip across two stations Because the strip laterals side was stretched and twisted during the process The model of case B closer to the practical process than case A and the calculated stress and strain on the tip of U section for case A were lower than these for case B by up to 15% From the result of case B for each process the stress for 12-station process was smallest 9-station process second and 6-station process next Because less-station can save larger cost and forming time but the bigger stress and strain for 6-station caused wrinkles on lateral sides not found on 9-station and 12-station Therefore 9-station process was a more suitable design than 12-station process smaller stretched and twisted and stress The progressive angles for 12-station was 7 5?

本文主要是以DEFORMTM有限元素軟體模擬U型鋼片連續(xù)道次成型與單一道次成型以確認(rèn)單一道次模擬的是否可取代連續(xù)道次模擬之研究美女黄色视频A毛片。因DEFORMTM 軟體對於網(wǎng)格元素上的限制故使用較短素材120mm通過所有的成型站以模擬工廠實(shí)際連續(xù)成形方法国产白拍一国产专区。輥輪間隙固定為0 3mm；輥輪轉(zhuǎn)速為20 rad/sec人人操人人上人人看；彎曲角度的方法為將成型角度平均除以成型站數(shù)午夜不卡巨屌。有三種輥輪成型方式被選擇分別為6站，9站色五月激情四射，與12站亚洲一区少妇视频。在模擬的過程中有兩種現(xiàn)象會(huì)產(chǎn)生 Case A，素材通過單一成型站午夜视频黄色。Case B精品国产AV天天更新，素材會(huì)通過兩個(gè)成型站。因?yàn)樵谀M過程中素材的兩端會(huì)有拉應(yīng)力與扭力久久九九re精品国产三级。Case B的模擬比Case A像實(shí)際的制程黄色视频在线观看免费网，并計(jì)算應(yīng)力與應(yīng)變在U型斷面的Tip部中可發(fā)現(xiàn)Case A比Case B低約15%。從Case B的每站的結(jié)果可以得知91国语露脸精品国产电话，12站的成型應(yīng)力最小亚洲黄色精品网站，9站次之，6站最后亚洲日韩欧美另类一区二区全部。

Bar frame section 14 x 5mm black bar, 12 x 3mm for top braces, bottom angles 12 x 12 x 3mm.

酒吧幀第14 x 5mm的黑條精品视频网站,国产视频网，12，底部角度12 × 12 × 3mm的上方括號x 3mm的色哟哟夜夜操。

KYN28-12 metal-clad enclosed switchgear is suitable for 3-phase AC 50Hz/7.2-12kV single bus bar and single bus bar section electric power system.,with the function of "five preventions".

KYN28-12鎧裝式金屬封閉開關(guān)設(shè)備（以下簡稱KYN28-12開關(guān)柜）適用于三相交流50Hz玖玖玖re96在线视频、7.2~12kV單母線及單母線分段電力系統(tǒng)，具有&五防&功能日本羞羞网站。

Thickness and density of defects lying in cross section of end bar is larger than in slot bar.

端部線棒剖面上的缺陷厚度和局部缺陷密度比槽部線棒大亚洲香蕉视频综合在线，分析認(rèn)為熱機(jī)應(yīng)力是形成脫殼的重要原因，機(jī)械應(yīng)力是形成分層的重要原因在线免费观看你懂的。

Bar and Bar Section Plant, Handan Iron and Steel Group Co, Handan 056015, Hebei, China

邯鄲鋼鐵集團(tuán)公司型棒材廠人人操人人干人人揉日日揉日日操，河北邯鄲 056015

Rav4 original section before the bar, installed, not only reflects the suv off-road style, but also can protect the pre-bar to prevent pipe cleaner and reduce the harm to third parties

rav4原廠款前杠，安裝后日韩免费一级一欧美一级毛，不僅體現(xiàn)suv越野的風(fēng)格浓毛欧美老妇乱人伦视频在线，還可以保護(hù)前杠，避免管擦和減少對第三方的傷害