CN1007917B - 组合预应力结构构件 - Google Patents
组合预应力结构构件Info
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- CN1007917B CN1007917B CN86103048A CN86103048A CN1007917B CN 1007917 B CN1007917 B CN 1007917B CN 86103048 A CN86103048 A CN 86103048A CN 86103048 A CN86103048 A CN 86103048A CN 1007917 B CN1007917 B CN 1007917B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
- E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/06—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed for the production of elongated articles
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
- E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
- E04B5/29—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal
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- Physics & Mathematics (AREA)
- Rod-Shaped Construction Members (AREA)
- Bridges Or Land Bridges (AREA)
- Joining Of Building Structures In Genera (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Panels For Use In Building Construction (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Compressor (AREA)
Abstract
一种组合预应力结构构件,包括一个模制的上混凝土平板及下金属支持构件。混凝土平板由连接件固定到金属支持构件上。金属支持构件上有凸缘,该凸缘位于或接近相对于倒置的金属支持构件的竖向挠曲中性轴处,并且远离相对于直立的该组合预应力结构构件的竖向挠曲中性轴。
Description
本发明关于组合预应力结构构件。
在建造组合预应力结构构件的领域里,有很多预加应力的方法可以使用。特别是一种在美国专利号4,493,177内显示的将这类组合构件预加应力的方法。在这里,预加应力是透过将组合构件倒转过来形成而获得的。该倒转形成包括将组合构件的钢梁连接到模子的上方,使抗剪结合器向下伸进模子内。钢梁及模子被连接及支持,使得模子的挠曲引致钢梁的平行挠曲。当模子被填充混凝土时,钢梁与模子会因为梁、模子及混凝土的重量而向下挠曲;从而将梁预加应力。倒转子的梁的上凸缘(在直立时是下凸缘)接受一个压力的预加应力。当混凝土结固后,模子会被移走;已连接的梁及混凝土平板会倒转使组合构件直立。在直立位置时,梁的底凸缘接受一个拉力,该拉力会由倒转模制时所得的压力预应力所减少。混凝土当然接受压力。
这种预加应力产生了由浇注混凝土本身所得的改良预应力。毋须分开的预加应力工作。此外,最顶的或表面的混凝土是在模子底部形成的混凝土,混凝土的表面比没有倒转的混凝土结构有较低的渗透性,并更坚硬。更进一步的是在一个预应力关系中的这种预应力效果是基于混凝土的重量分配及梁的结合。这种预应力关系比由千斤顶所产生的将更多预应力集中在一点的预应力关系改进了很多。
本发明的结构构件以更少的价值提供了更佳的强度及抗弯曲性。
本发明亦提供一组合预应力结构构件,其包括一个模制混凝土上平板及一下金属支持构件在连接件之下延伸及被连接件连接着;所述金属支持构件则连接到所述平板及透过将支持构件连接到模子的上面而被预加应力,使得所述模子的位移引致所述支持件有与模子约略平行的挠曲,而支持构件则被支持着,使模子及支持构件的变位能进行,而通过将模子填充混凝土而成的混凝土板挠曲模子及支持构件,使支
持件会由于挠曲而被预加应力;其中,支持构件位于或邻近相对于倒置支持构件的竖向挠曲的中性轴有凸缘,该凸缘则远离相对于直立组合结构的竖向挠曲的中性轴,从而使组合构件的抗弯能力增加。
一个尤为希望的较下支持件包括第一及第二梁,它们分别有第一及第二凸缘,它们一起形成邻近倒转支持构件的中性轴的凸缘。例如,两条工字梁可以叠起来,而将它们的凸缘焊在一起以形成支持构件。通常,细小的梁的每一重量单位的价值比较大的梁的每一重量单位的价值要低,比起减少钢材量所产生的节约能更进一步将价值降低。
为了使本发明更易于理解,以下透过参考附图以例子形式说明,其中:
图1为用于本发明的构件的两条叠起及连接的梁的部分透视图;
图2为根据本发明的构件而形成的组合预应力结构的横截面;
图3为本发明的构件在一个形成程序中的简略侧视图;
图4为已经可以使用的本发明的构件的简略侧视图;及
图5为根据本发明建造的构件的端视图。
为了进一步了解本发明,在此提出其有关的描述作为参考。
参考图1,本发明的组合预应力结构构件提供一支撑,该支撑包括叠在一起的工字梁11及13。上梁11在其下凸缘15处与下梁13的上凸缘17焊接起来。如图1所示,如果工字梁11及13有足够不同的大小,可在较大的凸缘上提供一个焊接面19。为了要使工字梁11及13相对之间完全固定,必须沿着焊接面19形成连续焊接21(或固定间隔地点焊)。
现在参考图2,当叠起的梁11及13被连接后,它们会被倒转并放入模制器具23内。模制器具包括模子底部25及模子侧面27,形成混凝土被灌入的模子。隔离物29在模子末端将梁11及13支
撑着,使梁有相对于模子底面25的高度。隔离物亦为末端支持***的一部分。抗剪结合器47从梁11的凸缘30向下伸展进模内。
连接组件包括由连接枝35连接的上横梁31及下横梁33,将梁11及13连接到模子。连接组件沿着梁11及13及模子被隔开,使得模子的挠曲会引发梁11及13平行的挠曲。螺帽37分别旋在枝35的相对端以调节地将上横梁31连接到下横梁33。整个连接的模子及横梁在相对末端处由末端支撑39所支撑。
现在参考图3,当连接的模子及梁预备好后,混凝土被倾入模子内引致梁11及13以及模子在支撑39之间向下挠曲。当梁11及13由于梁、模子及湿混凝土的重量而向下挠曲时,倒转的已挠曲的梁的中性轴A-A是位于或接近该连接的中间凸缘15及17。
在混凝土被倾入模子中引致梁及模子挠曲后,混凝土会干固成一混凝土平板41。混凝土平板41由抗剪结合器47将其固定到梁11及13,抗剪结合器47从梁11的凸缘30伸到混凝土平板41。随着混凝土平板41干固后,从混凝土将模子移去,并将组合平板及梁如图4所示转回直立。在使用时,这个组合结构构件会在其末端42及43受到支撑。在组合构件上的恒载及活荷载的弯距使组合构件向下挠曲。相对于直立挠曲的组合构件的中性轴B-B是位于或邻近于梁11的上缘30。由于中性轴B-B邻近凸缘30,凸缘15及17均足够地低于中性轴,比起由单一条适当设计的工字梁所支持的组合构件,本组合构件的断面模量便大大增加。这样便大大改善了组合预应力结构构件的抗弯能力。
本构件中的叠梁11及13的优点在于在一组合的构件中得到高的断面模量,并同时在倾倒混凝土以形成平板41时保持一个低的断面模量。这样可以减少用钢量而同时保持相同或更高的断面模量。此
外,由于结合细小的梁的价值低于相同重量的单一条梁的价值,价值的减少更多于节省的钢。
现在参考图5,其显示一组合构件的端视,包括在混凝土平板41的起拱45,使组合构件的中性轴更远离梁11及13的凸缘15及17。起拱45可以将混凝土分两次倾倒而形成。首先,混凝土倾倒入模子之内至一平板的要求高度并容许足够的干固,以便承托着第二次的倾注。新的模板会放置在抗剪结合器47的两边以形成给起拱45的模板空间。起拱45接着被倾注至梁11的凸缘30的高度。抗剪结合器47通过起拱45而伸展至第一倾注层。
虽然上述实施例显示叠放及焊接工字梁,其实很多梁或梁的组合均有接近梁的中性轴的凸缘;可以达到当梁在预加应力时,有低的断面模量,并在组合构件时有高的断面模量。例如,T形梁可以焊接一块中间板(中性轴凸缘)以得到一个梁断面模量与组合构件断面模量有所需要的比例。
以下的计算是跨度为18.29米并附有宽度为3.25米及厚度为0.178米的平板的两个组合构件设计的详情。例1是两条表面电镀的单一工字梁(W24×55)所支持,而例2则由两条叠着的工字梁(上为W24×22,下为W18×35)所支持。该两个结构均如上所述地预加应力及形成的,例1用了在中性轴线没有凸缘的单条梁。
以下为标号的简述:
I=惯性矩(米4)
fb,f1=负载时顶缘或底缘的计算应力(帕斯卡)
(C)=压应力(帕斯卡)
(T)=拉应力(帕斯卡)
LL=活荷载
N=钢的弹性模量与混凝土的弹性模量之比(短期活
荷载为7,而长期恒载则为21)
fc=混凝土的计算应力(帕斯卡)
M=弯矩(牛顿米)
例1:
1.钢的中性轴 =0.264米
2.一条大梁的重量 =每米97公斤
3.一条大梁的惯性矩 =7.14×10-4米4
4.大梁的顶的断面模量 =2.06×10-3米3
5.大梁的底的断面模量 =2.70×10-3米3
6.混凝土强度 =3.448×107帕斯卡
7.平板的顶加固钢枝 =15枝4号钢枝
8.平板底的加固钢枝 =8枝4号钢枝
9.N之值 =7
10.中性轴的位置 =0.60米
11.组合断面的惯性矩 =5.29×10-3米4
12.混凝土的断面模量 =0.028米5
13.顶缘的断面模量 =0.558米3
14.底的断面模量 =8.78×10-3米3
15.N之值 =21
16.中性轴的位置 =0.51米
17.组合断面的惯性矩 =4.10×10-3米4
18.混凝土的断面模量 =0.0145米3
19.顶缘的断面模量 =0.039米3
20.底的断面模量 =0.008米3
21.预应力fb= 734.4/(2(2.7×10-3)) =1.36×105帕斯卡
ft= 737.48/(2(2.06×10-3)) =1.79×105帕斯卡
22.反转fb= 1336/0.008 =1.67×105帕斯卡
表层fb= 124/0.008 =1.55×104帕斯卡
LL+I)fb= 1317/(8.78×10-3) =1.50×105帕斯卡
∑fb=(-1.36+1.67+0.155+1.50)×105=1.965×105帕斯卡(T)>1.86×105帕斯卡
23.0.105×105= ((M))/(2(2.7×10-3)) - ((M))/0.008
M=174.46牛顿米(额外需要的预应力弯矩)
24.ft=1.79× 1634.8/(2(2.06×10-3)) - ((1473.2+164.8))/0.039 - 1116/0.558 =(1.79+0.40-0.42-0.02)×105
ft=1.75×105(T)<1.86×105帕斯卡
25.倒转+表层+预应力fc= 78.3/(0.0145(21)) =0.054×105(C)
(LL+I)fb= 187.6/(0.028(7)) =0.067×105(C)
∑fc=0.12×105(C)<0.14×105
例2.
1.钢的中性轴 =0.38米
2.一条大梁的重量 =每米84.8公斤
3.一条大梁的惯性矩 =7.03×10-4米4
4.一条大梁的顶断面模量 =1.68×10-3米3
5.一条大梁的底断面模量 =1.85×10-3米3
6.混凝土强度 =3.448×102帕斯卡
7.顶钢 =15枝4号钢枝
8.底钢 =8枝4号钢枝
9.N之值 =7
10.中性轴位置 =0.78米
11.组合断面的惯性矩 =6.08×10-3米4
12.混凝土断面模量 =0.032米3
13.顶缘的断面模量 =0.428米3
14.底的断面模量 =7.76×10-3米3
15.N之值 =21
16.中性轴位置 =0.68米
17.组合断面的惯性矩 =4.75×10-3米4
18.混凝土断面模量 =0.016米3
19.顶缘的断面模量 =0.039米3
20.底的断面模量 =0.007米3
21.预应力fb= ((66.22+118.27+551.93))/(2(1.85×10-3)) =1.98×10(C)
ft= 735.84/(2(1.68×10)) =2.19×105(T)
22.倒转fb= 1344/0.007 =1.92×105(T)
表层fb= 144/0.008 =0.18×105(T)
(LL+I)fb= 1311.44/(7.76×10-3) =1.69×105(T)
∑fb=1.81×105(T)<1.86×105帕斯卡
23.倒转+表层ft= 1443/0.039 =0.37×105(C)
(LL+I)ft= 12.84/0.428 =0.03×105(C)
∑fX=1.79×105(T)<1.86×105帕斯卡
24.倒转+表层fc= 1478/(00.016(21)) =0.044×105(C)
(LL+I)fc= 1331/(0.032(7)) =0.059×105(C)
∑fc=0.99×104(C)<0.14×105帕斯卡
以上两个设计均为可接受的,因为它们的最终应力非常相似。但是,使用叠梁的例子明显地优胜,因为它用更少钢材、无须额外的预应力弯矩、有更低的混凝土应力并会挠曲更少。其中一种决定叠梁例子与表面电镀滚轧梁(工字梁)的例子那一个较优胜的办法是比较它们的组合与非组合断面模量。
例子1的断面模量比例为
(8.78×10-3)/(2×2.70×10-3) =1.63
而例子2的断面模量比例为
(7.76×10-3)/(2×1.85×10-3) =2.09
Claims (4)
1、一种组合预应力结构构件,包括一个模制的上混凝土平板及一下金属支持构件,混凝土平板由连接件固定到金属支持构件上,其特征在于:金属支持构件上有凸缘,该凸缘位于或接近相对倒置的金属支持构件的竖向挠曲中性轴处,并且远离相对于直立的该组合预应力结构构件的竖向挠曲中性轴。
2、如权利要求1所述的组合预应力结构构件,其特征在于所述的金属支持构件是在所述凸缘处叠合并连接的第一梁及第二梁。
3、如权利要求2所述的组合预应力结构构件,其特征在于所述的第一及第二梁分别有第一及第二凸缘,它们一起形成所述的凸缘。
4、如权利要求3所述的组合预应力结构构件,其特征在于所述的凸缘是由第一及第二凸缘焊接而成的。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/719,339 US4646493A (en) | 1985-04-03 | 1985-04-03 | Composite pre-stressed structural member and method of forming same |
US719339 | 1985-04-03 |
Publications (2)
Publication Number | Publication Date |
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CN86103048A CN86103048A (zh) | 1986-12-17 |
CN1007917B true CN1007917B (zh) | 1990-05-09 |
Family
ID=24889684
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Application Number | Title | Priority Date | Filing Date |
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CN86103048A Expired CN1007917B (zh) | 1985-04-03 | 1986-03-29 | 组合预应力结构构件 |
Country Status (9)
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US (1) | US4646493A (zh) |
EP (1) | EP0198600B1 (zh) |
JP (1) | JPS61274907A (zh) |
CN (1) | CN1007917B (zh) |
AT (1) | ATE50528T1 (zh) |
AU (1) | AU5504986A (zh) |
BR (1) | BR8601492A (zh) |
CA (1) | CA1259813A (zh) |
DE (1) | DE3669124D1 (zh) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4785600A (en) * | 1988-02-16 | 1988-11-22 | Ting Raymond M L | Buildup composite beam structure |
US5152112A (en) * | 1990-07-26 | 1992-10-06 | Iota Construction Ltd. | Composite girder construction and method of making same |
US5144710A (en) * | 1991-02-28 | 1992-09-08 | Grossman Stanley J | Composite, prestressed structural member and method of forming same |
CA2134644C (en) * | 1993-04-01 | 1998-06-16 | Min Se Koo | Method to construct the prestressed composite beam structure and the prestressed composite beam for a continuous beam thereof |
US5617599A (en) * | 1995-05-19 | 1997-04-08 | Fomico International | Bridge deck panel installation system and method |
US6416693B1 (en) | 1996-07-01 | 2002-07-09 | William D. Lockwood | Method of strengthening an existing reinforced concrete member |
US5894003A (en) * | 1996-07-01 | 1999-04-13 | Lockwood; William D. | Method of strengthening an existing reinforced concrete member |
US5978997A (en) * | 1997-07-22 | 1999-11-09 | Grossman; Stanley J. | Composite structural member with thin deck portion and method of fabricating the same |
US6588160B1 (en) | 1999-08-20 | 2003-07-08 | Stanley J. Grossman | Composite structural member with pre-compression assembly |
US6857156B1 (en) | 2000-04-05 | 2005-02-22 | Stanley J. Grossman | Modular bridge structure construction and repair system |
KR100427405B1 (ko) * | 2001-03-07 | 2004-04-17 | 박재만 | 피에스에스씨 합성거더 |
US20030093961A1 (en) * | 2001-11-21 | 2003-05-22 | Grossman Stanley J. | Composite structural member with longitudinal structural haunch |
US7370452B2 (en) * | 2002-09-16 | 2008-05-13 | Rogers Melissa B | Mat assembly for heavy equipment transit and support |
CA2575746C (en) * | 2004-08-02 | 2011-03-01 | Tac Technologies, Llc | Engineered structural members and methods for constructing same |
US7930866B2 (en) * | 2004-08-02 | 2011-04-26 | Tac Technologies, Llc | Engineered structural members and methods for constructing same |
US8065848B2 (en) | 2007-09-18 | 2011-11-29 | Tac Technologies, Llc | Structural member |
US8266856B2 (en) * | 2004-08-02 | 2012-09-18 | Tac Technologies, Llc | Reinforced structural member and frame structures |
US7721496B2 (en) * | 2004-08-02 | 2010-05-25 | Tac Technologies, Llc | Composite decking material and methods associated with the same |
US7600283B2 (en) * | 2005-01-21 | 2009-10-13 | Tricon Engineering Group, Ltd. | Prefabricated, prestressed bridge system and method of making same |
US8161691B2 (en) | 2008-05-14 | 2012-04-24 | Plattforms, Inc. | Precast composite structural floor system |
US8297017B2 (en) | 2008-05-14 | 2012-10-30 | Plattforms, Inc. | Precast composite structural floor system |
US8381485B2 (en) | 2010-05-04 | 2013-02-26 | Plattforms, Inc. | Precast composite structural floor system |
US8453406B2 (en) | 2010-05-04 | 2013-06-04 | Plattforms, Inc. | Precast composite structural girder and floor system |
US20120090254A1 (en) * | 2010-10-14 | 2012-04-19 | Mr. Venkata Rangarao Vemuri | Method of forming flat strip stepped slab floor system of reinforced concrete |
CN103128851B (zh) * | 2013-03-06 | 2015-03-25 | 中铁二十五局集团建筑安装工程有限公司 | 一种适用不同跨度的非标准t型梁的制造方法 |
CN103273567B (zh) * | 2013-06-06 | 2015-04-22 | 浙江金筑交通建设有限公司 | 一种带可调节顶托的活动钢台座及施工方法 |
US10895047B2 (en) | 2016-11-16 | 2021-01-19 | Valmont Industries, Inc. | Prefabricated, prestressed bridge module |
CN108943359B (zh) * | 2018-08-20 | 2020-07-24 | 西平县华鼎电气装备有限责任公司 | 一种混凝土电杆生产方法 |
CN109537787B (zh) * | 2018-12-28 | 2024-02-13 | 上海建工五建集团有限公司 | 装配式预应力大板反拱度自调整***及其使用方法 |
US10718094B1 (en) * | 2019-02-12 | 2020-07-21 | Valmont Industries, Inc. | Tub girders and related manufacturing methods |
CN116787012A (zh) * | 2023-06-27 | 2023-09-22 | 中国航空制造技术研究院 | 一种高效低成本带筋整体板坯的制备方法 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US152794A (en) * | 1874-07-07 | Improvement in girders and columns | ||
US2725612A (en) * | 1955-12-06 | Lipski | ||
AT50958B (de) * | 1911-01-30 | 1911-11-25 | Witkowitzer Bergb Gewerkschaft | Zerlegbare eiserne Brücke. |
US1652056A (en) * | 1927-04-21 | 1927-12-06 | Edward B Selway | Adjustable floor and roof form |
US2382138A (en) * | 1941-07-02 | 1945-08-14 | Porete Mfg Company | Composite beam structure |
US2382139A (en) * | 1941-07-16 | 1945-08-14 | Porete Mfg Company | Prestressed composite structure |
US2373072A (en) * | 1941-08-19 | 1945-04-03 | Ernest M Wichert | Rigid frame bridge and method of making the same |
US3166830A (en) * | 1962-05-02 | 1965-01-26 | Greulich Gerald Gregory | Method of making prestressed girder |
US3305612A (en) * | 1964-06-05 | 1967-02-21 | Conodec Inc | Method for forming a prefabricated truss deck |
BE719675A (zh) * | 1968-08-19 | 1969-02-19 | ||
ES370274A1 (es) * | 1968-08-19 | 1971-04-01 | Lipski | Procedimiento de fabricacion de una viga previamente fle- xionada. |
US4093689A (en) * | 1974-03-14 | 1978-06-06 | Licencia Talalmanyokat Ertekesito Vallalat | Process for producing reinforced concrete building units, especially floor panels having smooth surfaces and coffer-like inner holes, and formwork especially for carrying out the process |
JPS6041404B2 (ja) * | 1975-03-14 | 1985-09-17 | マイエフエール・ソシエテ・アノニム | 絶縁金属線を生産するのに使用する冷却装置 |
US4279680A (en) * | 1978-07-28 | 1981-07-21 | Watson Jr Louis L | Methods for forming thinwall structures |
US4493177A (en) * | 1981-11-25 | 1985-01-15 | Grossman Stanley J | Composite, pre-stressed structural member and method of forming same |
-
1985
- 1985-04-03 US US06/719,339 patent/US4646493A/en not_active Expired - Lifetime
- 1985-09-20 CA CA000491171A patent/CA1259813A/en not_active Expired
-
1986
- 1986-03-14 DE DE8686301876T patent/DE3669124D1/de not_active Expired - Fee Related
- 1986-03-14 AT AT86301876T patent/ATE50528T1/de not_active IP Right Cessation
- 1986-03-14 EP EP86301876A patent/EP0198600B1/en not_active Expired - Lifetime
- 1986-03-24 AU AU55049/86A patent/AU5504986A/en not_active Abandoned
- 1986-03-29 CN CN86103048A patent/CN1007917B/zh not_active Expired
- 1986-04-02 BR BR8601492A patent/BR8601492A/pt unknown
- 1986-04-03 JP JP61077501A patent/JPS61274907A/ja active Pending
Also Published As
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CA1259813A (en) | 1989-09-26 |
BR8601492A (pt) | 1986-12-09 |
AU5504986A (en) | 1986-10-09 |
EP0198600A1 (en) | 1986-10-22 |
ATE50528T1 (de) | 1990-03-15 |
EP0198600B1 (en) | 1990-02-28 |
CN86103048A (zh) | 1986-12-17 |
DE3669124D1 (de) | 1990-04-05 |
JPS61274907A (ja) | 1986-12-05 |
US4646493A (en) | 1987-03-03 |
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