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轨道交通钢混组合连续梁及剪力件设计探讨

价值工程 2025年第1期44卷 71-73页

作者：李牧中铁上海设计院集团有限公司上海200040

由于钢混组合梁结构可以充分发挥混凝土和钢结构的性能优势,因此在轨道交通桥梁设计中逐步得到推广。目前对于轨道交通组合梁上部结构构造设计及计算参考较少,不同设计标准、规范针对剪力件的计算仍存在区别,因此有必要对上述问题进行... 详细信息

由于钢混组合梁结构可以充分发挥混凝土和钢结构的性能优势,因此在轨道交通桥梁设计中逐步得到推广。目前对于轨道交通组合梁上部结构构造设计及计算参考较少,不同设计标准、规范针对剪力件的计算仍存在区别,因此有必要对上述问题进行分析探讨。本文结合国内某轨道交通项目(45+70+45)m钢混组合连续梁的设计,通过有限元软件建模计算,分析钢混组合梁的受力特点,并针对国内外不同规范对于钢混组合梁剪力件的抗剪承载力计算公式进行比较及探讨,以期为同类型桥梁设计计算提供一定参考。

关键词：轨道交通桥梁钢混组合连续梁剪力连接件焊钉结构分析

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Machi.es as readers: A soluti.n to the copyri.ht problem

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Journal of Zheji.ng Uni.ersi.y-Sci.nce A(Appli.d Physi.s & Engi.eeri.g) 2005年第11期6卷 1179-1187页

作者： SHAMOS Mi.hael i. School of Computer Sci.nce Carnegie Mellon University Pittsburgh PA 15213 USA Department of Computer Science University of Hong Kong Hong Kong China

Copyri.ht and i.s i.ternati.nal compli.ati.ns have presented a si.ni.i.ant barri.r to the Uni.ersal Di.i.al Li.rary （UDL）＇s mi.si.n to di.i.i.e all the publi.hed works of manki.d and make them avai.able throughout the world. We di.cuss the effect of exi.ti.g copyri.ht treati.s and vari.us proposals, such as compulsory li.ensi.g and the publi. lendi.g fi.ht that would allow access to copyri.hted works wi.hout requi.i.g permi.si.n of thei. owners. We argue that these schemes are i.effecti.e for purposes of the UDL. i.stead, maki.g use of the i.ternati.nal consensus that copyri.ht does not protect facts, i.formati.n or processes, we propose to scan works di.i.ally to extract thei. i.tellectual content, and then generate by machi.e syntheti. works that capture thi. content, and then translate the generated works automati.ally i.to multi.le languages and di.tri.ute them free of copyri.ht restri.ti.n.

关键词： Uni.ersal Di.i.al Li.rary (UDL) Copyri.ht Di.i.al ri.hts management Compulsory li.ense Berne conventi.n Publi. lendi.g ri.ht Syntheti. documents Machi.e translati.n

Si.ulati.n Envi.onments: Challenges for Advancement

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Journal of Systems Engi.eeri.g and Electroni.s 1993年第4期4卷 12-24页

作者： Tuncer i.ren Department of Computer Sci.nce University of OttawaOttawaOn KIN 6N5.Canada

A bri.f revi.w of the basi. termi.ology on si.ulati.n, si.ulati.n li.e-cycle acti.i.i.s such as model-based acti.i.i.s, behavi.r-ori.nted acti.i.i.s, and quali.y assurance acti.i.i.s i. gi.en. Then, the challenges and opportuni.i.s for the advancement of the state-of-the-art i. si.ulati.n envi.onments are di.cussed under the followi.g headi.gs: modelli.g envi.onments, si.ulati.n envi.onments, mi.ed si.ulati.n envi.onments, and comprehensi.e si.ulati.n envi.onments.

关键词： Modelli.g envi.onments Si.ulati.n envi.onments Mi.ed si.ulati.n envi.onments Comprehensi.e si.ulati.n envi.onments.

i.pact of Drai. Effluent on Surfi.i.l Sedi.ents i. the Medi.erranean Coastal Wetland: Sedi.entologi.al Characteri.ti.s and Metal Polluti.n Status at Lake Manzala, Egypt

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Journal of Ocean Uni.ersi.y of Chi.a 2019年第4期18卷 834-848页

作者： FARHAT Hassan i. Geology Department Faculty of Science Suez University

Surface sedi.ents were collected from Lake Manzala, the Medi.erranean coastal wetland located to the east of the Ni.e Delta, Egypt, to assess the effect of drai. effluent on the spati.l vari.ti.ns of sedi.entary characteri.ti.s and heavy metal polluti.n. Grai.-si.e composi.i.ns, textures, and heavy metal di.tri.uti.n patterns i. sedi.ents are presented usi.g Gi. techni.ue. Results of the analysi. of the sedi.ent showed a clear effect of drai. effluent, wi.h an i.crease i. fi.e fracti.ns and homogeneous suspensi.ns i. transportati.n mode. Lake sedi.ents were domi.ated by sandy mud textures, and mode of transportati.n was homogeneous sus- pensi.n and rolli.g. Spati.l di.tri.uti.n of heavy metals (Fe, Mn, Zn, Cu, Ni. Cr, and Pb) was studi.d i. the lake’s surfi.i.l sedi.ents, along wi.h thei. relati.nshi. to drai. effluent and thei. contami.ati.n status i. the ecologi.al system. Heavy metal polluti.n status was assessed by means of accepted sedi.ent quali.y gui.eli.es and contami.ati.n assessment methods (contami.ati.n factor, con- tami.ati.n degree, modi.i.d contami.ati.n degree, geo-accumulati.n, and enri.hment factor). Among the determi.ed heavy metals, Pb had the most ecologi.al ri.k. Generally, the heavy metals i. the surface sedi.ents i.di.ated polluti.n ri.k rangi.g from moderate to consi.erable, parti.ularly, i. those si.es faci.g drai.s and i.lets that had the hi.hest toxi. effluent. The results were i.terpreted by stati.ti.al means. A cluster analysi. defi.ed areas faci.g drai. di.charge and i.lets as separated groups. ANOVA i.di.ated that most of the sedi.entati.n and studi.d metals di.ected thi. clusteri.g.

关键词： Lake Manzala Medi.erranean wetland metal polluti.n sedi.entologi.al characteri.ti.s

＂Could charm （＆ τ） transi.i.ns be the ＇poor pri.cess＇ provi.i.g a deeper understandi.g of fundamental dynami.s ？＂ or：＂Fi.di.g novel forces＂

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Fronti.rs of physi.s 2015年第3期10卷 1-28页

作者： i.aros i. Bi.i Department of Physi.s University of Notre Dame du Lac Notre Dame IN 46556 USA

We know that our Uni.erse i. composed of only - 4.5% ＂known＂ matter; therefore, our understandi.g i. i.complete. Thi. can be seen di.ectly i. the case of neutri.o osci.lati.ns （wi.hout even consi.eri.g potenti.l other uni.erses）. Charm quarks have had consi.erable i.pact on our under- standi.g of known matter, and quantum chromodynami.s （QCD） i. the only local quantum fi.ld theory to descri.e strong forces. i. i. possi.le to learn novel lessons concerni.g strong dynami.s by measuri.g rates around the thresholds of [Q^-Q] states wi.h Q = b, c. Furthermore, these states provi.e us wi.h gateways towards new dynami.s （ND）, where we must transi.i.n from ＂accuracy＂ to ＂preci.i.n＂ eras. Fi.ally, we can make connecti.ns wi.h τ transi.i.ns and, perhaps, wi.h dark matter. Charm dynami.s acts as a bri.ge between the worlds of li.ht- and heavy-flavor hadrons （namely, beauty hadrons）, and fi.di.g regi.nal asymmetri.s i. many-body fi.al states may prove to be a ＂game changer＂. There are several di.ferent approaches to achi.vi.g these goals： for exam- ple, experi.ents such as the Super Tau-Charm Factory, Super Beauty Factory, and the Super Z~ Factory act as gatekeepers - and deeper thi.ki.g regardi.g symmetri.s.

关键词： CKM matri. HQE & OPE CPV i. △C≠ 0 ≠ △B &τ decays

What went wrong i. sci.nce publi.hi.g?

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Nati.nal Sci.nce Revi.w 2017年第4期4卷 518-519页

作者： Chung-i.Wu mu-Mi.g Poo School of Li.e Sci.nce Sun Yat-Sen University Department of Ecology and Evoluti.n University of Chicago

Sci.nce publi.hi.g has changed dramati.ally i. the last few *** sci.nti.i. reports are prepared by the authors,processed by the journals and evaluated by the academi. all have seri.us problems at *** sci.nti.i. fi.lds,parti.ularly bi.logi.al sci.nces,have become domi.ated by major publi.hi.g enterpri.es and thei.‘hi.h-profi.e’journals.

关键词： What went wrong i. sci.nce publi.hi.g

Evaluati.n of FEMA-440 for i.cludi.g soi.-structure i.teracti.n

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Earthquake Engi.eeri.g and Engi.eeri.g Vi.rati.n 2010年第3期9卷 397-408页

作者： Khoshnoudi.n F. Behmanesh i. Faculty of Ci.i. Engi.eeri.g Amirkabir University of Technology Faculty of Ci.i. and Envi.onmental Engi.eeri.g Tufts University

Replaci.g the enti.e soi.-structure system wi.h a fi.ed base osci.lator to consi.er the effect of soi.-structure i.teracti.n （SSi. i. a common analysi. method i. sei.mi. desi.n. Thi. techni.ue has been i.cluded i. desi.n procedures such as NEHRP, ASCE, etc. by defi.i.g an equi.alent fundamental peri.d and dampi.g rati. that can modi.y the response of the structure. However, recent studi.s i.di.ate that the effects of SSi.should be reconsi.ered when a structure undergoes a nonli.ear di.placement demand. i. recent documents on Nonli.ear Stati. Procedures （NSPs）, FEMA-440 （2005）, a modi.i.d dampi.g rati. of the replacement osci.lator was proposed by i.troduci.g the ducti.i.y of the soi.-structure system obtai.ed from pushover analysi.. i. thi. paper, the dampi.g defi.ed i. FEMA-440 to i.clude the soi.-structure i.teracti.n effect i. evaluated, and the accuracy of the Coeffi.i.nt Method gi.en i. FEMA-440 and the Equi.alent Li.eari.ati.n Method i. studi.d. Although the i.provements for Nonli.ear Stati. Procedures （NSPs） i. FEMA-440 are achi.ved for a fi.ed base SDOF structure, the soi. effects are not perfectly obtai.ed. Furthermore, the dampi.g defi.i.i.n of a soi.-structure system i. extended to structures to consi.er bi.i.ear behavi.r.

关键词： soi.-structure i.teracti.n foundati.n dampi.g i.elasti. behavi.r equi.alent li.eari.ati.n

i.teracti.n of the Arabi.opsi. UV-B-Speci.i. Si.nali.g Component UVR8 wi.h Chromati.

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Molecular Plant 2008年第1期1卷 118-128页

作者： Catheri.e Cloi. Gareth i. Jenki.s Plant Sci.nce Group Division of Biochemistry and Molecular Biology Institute of Biomedical and Life Sciences Bower Building University of GlasgowGlasgow G12 BQQ UK

Arabi.opsi. UV RESi.TANCE LOCUS8 （UVR8） i. a UV-B-speci.i. si.nali.g component that regulates expressi.n of a range of genes concerned wi.h UV protecti.n. Here, we i.vesti.ate the i.teracti.n of UVR8 wi.h chromati.. Usi.g anti.odi.s speci.i. to UVR8 i. chromati. i.munopreci.i.ati.n （Chi.） assays wi.h wi.d-type plants, we show that nati.e UVR8 bi.ds to chromati. i. vi.o. Si.i.ar experi.ents usi.g an anti.GFP anti.ody wi.h plants expressi.g a GFP-UVR8 fusi.n show that UVR8 associ.tes wi.h a relati.ely small regi.n of chromati. contai.i.g the HY5 gene. UVR8 i.teracts wi.h chromati. contai.i.g the promoter regi.ns of other genes, but not wi.h all the genes i. regulates. UV-B i. not requi.ed for the i.teracti.n of UVR8 wi.h chromati. because associ.ti.n wi.h several gene loci.i. observed i. the absence of UV-B. Pulldown assays demonstrate that UVR8 associ.tes wi.h hi.tones i. vi.o and competi.i.n experi.ents i.di.ate that the i.teracti.n i. preferenti.lly wi.h hi.tone H2B. Chi. experi.ents usi.g anti.odi.s that recogni.e speci.i. hi.tone modi.i.ati.ns i.di.ate that the UV-B-sti.ulated transcri.ti.n of some genes may be correlated wi.h hi.tone modi.i.ati.n. i. parti.ular, the ELi.1 promoter showed a si.ni.i.ant enri.hment of di.cetyl hi.tone H3 （K9/K14） followi.g UV-B exposure. These fi.di.gs i.crease understandi.g of the i.teracti.n of the key UV-B-speci.i. regulator UVR8 wi.h chromati..

关键词： .Wi.d-type Regulates i.teracts Hi.tones Arabi.opsi. UV Si.nali.g Component UVR i.teracti.n of UVR nati.e UVR anti.GFP UVR associ.tes chromati. contai.i.g

Turbulent Agglomerati.n of Mi.roparti.les i. a Cyli.der Wake Flow Usi.g LES-DEM:Focusi.g on the Effect of the Reynolds Number

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Journal of Thermal Sci.nce 2025年第1期 34-49页

作者： WANG Shuang mu Li. Li.Xue Xi. Jun DONG Mi.g School of Energy and Power Engi.eeri.g Dalian University of Technology School of Opti.al i.formati.n and Energy Engi.eeri.g Wuhan Institute of Technology School of Energy and Envi.onment Shenyang Aerospace University

Turbulent agglomerati.n i. vi.wed as a promi.i.g technology for enhanci.g fi.e parti.le removal *** better understand parti.le transport,agglomerati.n behavi.rs,and flui.-parti.le i.teracti.ns,we numeri.ally explored these phenomena under cyli.dri.al vortex wake i.fluence usi.g a coupled large eddy si.ulati.n and di.crete element method（LES-DEM） *** vali.i.y of the LES approach was veri.i.d by compari.on wi.h avai.able di.ect numeri.al si.ulati.n（DNS） *** adopted the Johnson-Kendall-Roberts（JKR） contact model for parti.le-parti.le *** parti.le di.persi.n and agglomerati.n characteri.ti.s of parti.les wi.h di.ferent di.meters（dp=2-20 μm） i. the lami.ar and transi.i.n of shear layer（TrSL） flow regi.es were *** parti.les were concentrated at the vortex centers,whi.e larger parti.les accumulated around the *** agglomerati.n effi.i.ncy exhi.i.ed an M-shaped profi.e spanwi.e（y-di.ecti.n）.Wi.h i.creasi.g Reynolds number,the agglomerati.n effi.i.ncy and turbulence i.tensi.y *** parti.le agglomerati.n effi.i.ncy peaks at a certai. Reynolds ***,at hi.her Reynolds numbers,reduci.g the resi.ence ti.e of parti.les i. the flow fi.ld decreases the agglomerati.n effi.i.ncy.

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