Fire resistance of ultra high strength concrete filled steel tubular columns

... the fire resistance of high strength tubular steel columns infilled with ultra- high strength concrete with compressive strength up to 160MPa Although research work has been done on concrete filled ... effects of strengths of steel and concrete on the fire resistance time of CFST columns Analysis results showed that the fire resistance time of...

Ngày tải lên: 08/09/2015, 18:17

... depends on the relative areas of the column and the core and on the amount of transverse reinforcement provided Following spalling of the cover concrete, the load-carrying capacity of columns generally ... confined concrete area and more uniform distribution of the confining pressure, thereby improving the effectiveness of the confining reinforcement In the...

Ngày tải lên: 24/10/2014, 17:26

... 1.1—Scope This standard describes acceptable methods for determining the fire resistance of concrete and masonry assemblies and structural elements including walls, floor and roof slabs, beams, ... types of concrete, or of lay- Fig 2.1 Fire resistance of two-layer concrete walls, floors and roofs ers of concrete, concrete masonry and/ or clay mas...

Ngày tải lên: 24/10/2014, 17:40

... test methods, and the preparation and handling of test specimens Additional general GUIDE TO QUALITY CONTROL AND TESTING OF HIGH-STRENGTH CONCRETE information on the inspection of concrete is contained ... salt of a naphthalene sulfonate GUIDE TO QUALITY CONTROL AND TESTING OF HIGH-STRENGTH CONCRETE thawing and deicer scaling should be evaluat...

Ngày tải lên: 24/10/2014, 21:59

... summary, the selective area growths of InGaN QDs on dielectric patterns defined by the self-assembled diblock copolymer were carried out by MOCVD The use of selective area approach resulted in ultra-high ... doi:10.1186/1556-276X-6-342 Cite this article as: Liu et al.: Selective area epitaxy of ultra-high density InGaN quantum dots by diblock cop...

Ngày tải lên: 21/06/2014, 04:20

... comparative study of thermal behavior of iron and copper nanofluids J Appl Phys 2009, 106:064307 56 Murshed SMS, Leong KC, Yang C: Determination of the effective thermal diffusivity of nanofluids by ... the effective thermal conductivity of nanofluids J Heat Transfer Trans ASME 2006, 128:588 26 Yu W, Choi SUS: The role of interfacial layers in the enhanced thermal co...

Ngày tải lên: 21/06/2014, 05:20

... quality control, concrete properties, structural design, economic considerations, and applications Keywords: concrete properties; economic considerations; high-strength concrete; material selection; ... polymer-impregnated concrete, epoxy concrete, ultra-high-performance concrete; concrete with artificial, normal, and heavyweight aggregates; and reactive powder concrete In addit...

Ngày tải lên: 28/06/2014, 00:20

... ãđơã ô - ãắããơĐ đ - ạ đ - ẵá - ũ íôơã - ắằ ằăằđẵ - ẳ âáằ đằĐãạ ô ơáằđ - ẵããẵơ - ẳ ẵẳ - ẳằêằằẳ ắĐ ơáằđ ắẳã - ẳ ãẵđđơằẳ ắĐ đằằđằẵằ áằđằã - ẵằ - ẵá ơằđã Đ ắằ ẳããằẳ đ ằẳằẳ đ ơãằ ơãằ - - ôằơ ơáằ ... - ãơằẳằẳ - đằđ - ơơã đ âđđơĐ ơáằ ơáằ òằđãẵ - ãơôơằ ơằằ - đôẵơã đ Đ ơáằđ ằ - ằẳ áằđằãụ ơáơ ơá - ãđơã - - ãơú ắằ đ Đ ạằằđ đ đơãẵôđ - đ đằằẳ đ...

Ngày tải lên: 24/10/2014, 17:05

... 318 allows concrete mixtures to be proportioned HIGH-STRENGTH CONCRETE WITH PORTLAND CEMENT AND FLY ASH setting, h) method of placement, and i) workability 211.4R-3 high-strength concretes are ... of the cement and fly ash In Tables 4.3.5(a) and (b), recommended maximum w/(c+p) are given as a function of maximum-size aggregate HIGH-STRENGTH CONCRETE WITH...

Ngày tải lên: 24/10/2014, 17:40

... conventional reinforced concrete panels, steel fibre reinforced concrete panels, profiled steel sheeting reinforced concrete panels, steel- air -steel sandwich panels and steel -concrete- steel sandwich panels ... used as blast and impact protection panels or armour They include metal air sandwich panels or cellular metal panels, steel- concretesteel sa...

Ngày tải lên: 09/09/2015, 08:15

... the performance of a recording system and study the optimal write head and media designs for ultra high density and ultra high data rate magnetic recording using micromagnetic simulation National ... and grain boundary when conducting computer modeling and simulation for ultra- high density perpendicular recording processes It is expected that micr...

Ngày tải lên: 15/09/2015, 17:10

... ng thép nh i bê tơng ch u nén úng tâm Aa, Ac : di n tích m t c t ngang ng thép lõi bê tơng Ia, Ic : mơmen qn tính c a ti t di n ng thép ti t di n lõi bê tơng Ea, Ec : mơ un àn h i c a thép bê ... nhi u ng thép tròn c nh i bê tơng liên k t v i b ng b n thép (hình 5) ng thép c ch t o t thép t m theo ph ng pháp cu n tròn hàn d c ho c cu n d ng lò xo Hi u qu làm vi c c...

Ngày tải lên: 04/04/2014, 11:16

... are the turned, bored and milled dimensions Machinability and Surface Integrity ‘full’ production operational machining, meaning that with some degree of confidence, manufacturing dictates and ... in these doubtful situations, rather than ‘working blindly’ – with no relevant cutting data, to base the applied cutting conditions upon Several of these ‘ranking’ non -machining te...

Ngày tải lên: 21/06/2014, 22:20

... present in a data set into ‘components’ Each ‘component’ is attributed to an identifiable cause, or source of variation; in addition, one ‘component’ represents the variation due to uncontrolled ... meaningful machinability assessment 7.2 Machined Roundness Roundness is a condition of a surface of revolution’ , which can take the form of a: cylinder, cone, or sphere, where all th...

Ngày tải lên: 21/06/2014, 22:20

... magnitude of the output of a system with respect to that of the input – the conditions of operation and measurements must be specified’ (Smith, 1993, et al.) of increasing the frictional contact ... tooling with the greatest possible diameter with the minimum of tool overhang By way of a caution concerning chatter frequency, this normally occurs near the most flexible vi...

Ngày tải lên: 21/06/2014, 22:20