構造系736 号
日本建築学会構造系論文集 第82巻 第736号，823-829，2017年6月
J. Struct. Constr. Eng., AIJ, Vol. 82 No. 736, 823-829, Jun., 2017
DOI http://doi.org/10.3130/aijs.82.823【カテゴリーⅡ】

単純梁方式曲げ試験による SC 杭の中空部に中詰めした効果の検討ƣōȽȋĲËīë+<? SC û,ƴÐǺ+ƴ¼9 ó,æǎ
SC 杭の変形性能向上に関する研究（1）
SC û,ǿÙųǡöŞ+­?çÀ(1)A STUDY ON EFFECTS OF FILL IN HOLLOW PART OF SC PILESBASEDON SIMPLE
BENDINGTESTA STUDY ON
EFFECTSOF FILLBEAMIN HOLLOWPARTOF SC PILES

Study on improvement
in deformation
capacityof BENDING
steel & concretecomposite pile, Part1
BASEDON SIMPLE
BEAMTEST
Study on improvement in deformation capacity of steel & concrete composite pile, Part1

田中 佑二郎＊，関 口徹＊＊，中 井伸＊＊＊，中 井 正 一＊＊＊＊******
ǅƴȠǚɄ­õToruǁ SEKIGUCHI,ƴx ţ ƴx
ŵz****
YujiroTANAKA,Shin NAKAI

Yujiro TANAKA, Toru SEKIGUCHI,NAKAI and Shoichi NAKAIand ShoichiShin
NAKAI
The objective of this study is to examine the concrete filled effect in the hollow part of SC pile in order to improve the deformation
performance of pile. In the pile foundation structure, the improvement is prompted, assuming secondary seismic design. But, Studyon the deformation capacity of precast concrete pile is not sufficiently advanced. This study focuses on SC pile in precast concrete pile.
SC pile has an excellent bending strength and deformation performance. This study examined the effect of some parameters for
deformation performance of SC pile by simple beam bending test.

Keywords : Precast concrete pile, Deformation capacity, Secondary seismic design, Cyclic loading,´ŸLkHgWûǿÙųǡǚįſßÓ>ȃė(@?ûǏǸÎ(Şû)+Ȫ

1-<8?:
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(=ńǼ*çÀĀB@&*´ŸLkHgWû+­&-JIS ,ǞŜ<0ǜȒåưQkTǌ,
ûęǴƻ,ķǔ,9+ËīëǌǜŠƿ+ĀB@&,īë,:*ȜƿÅǇ¢Ǟ'?ǿÙųǡCǴ?



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6

PHC û,ƴÐǺ+LkHgWCƴ¼9?('ËǿÙųǡöŞ?
(ȉĊ 8),9)

+ƴ¼9CĀ#>SC û<0 PRC û+īëƘ:zǺ°6@&,Ɩ-Ú 400 mm s,ŕÚ'&?ęȼ,ÅǇî=@&&-û,ƴÐǺ

? 3 7)īëƘ?(ƴ¼9ę+ğȪ@?(*)Ơ(&?

SC û-Ăª,ƴÐǺ+LkHgWCǉǝŤŴÙ+<#&ŸƐ@?²ƈýƐǺę'?´ŸLkHgWû,ƴ': SCû-LkHgWĂª,ÊǺĒÑCȯĂªLkHgWCùƒ?(=ËÅǇąËǿÙųǡ+:ȡ@&?(þ=@&ȒçÀ'- SC ûCƙŝ(ɊėȋĲɋĂªôɌĳɀɍƴ¼9ę,[faTËǿÙųǡ+Ȧ?|ÉC¢Ǟ?(CȜƿ(&ƣōȽȋĲ+<?ËīëCĀ#

2-_XMp2- _XgMp

kHgWû,ÅǇǕų<0ǿÙųǡ,Ǵ 1);Ȁĭ"ȽȋĲ+2 7)

ĴĘ+ƞǿÙ

Ĭɂ-Ŗ*?:,9ǚįſß+ǱȬ(*VT,ƲżńǼ'*=@?(Ɩ6'ėËǿÙųǡ+$ &æǎ?û²ƈýƐ(& SC û-ËÅǇǱȬ

Table1 +īëƘzȳTable2 +ęȼŒìƩCıTable1 +ıĳɀǮ-Ǔǝ'œ('¿9ĳɀCû,ĴƦȚż(LkHgWÅǇ,żTable2 +ıgW<0ƴ¼9ę+$ǳ·&ęȼŒìƩ,"LkH&-īëƘ(ǒzīȼ,ęȼīëƩC?Ăª+$ &-ăǻɀǇ-ĂęæĐŜșő(`hNW),ƩdkIÕů-òŚƩCǳ·&&Ú 600 mmô 90 mm (?īëƘ-3īëƘ,[faT-ɊėȋĲɋĂªôɌĳɀɍƴ¼9ę, 4 $([faTËǿÙųǡ+Ȧ?|ÉC¢Ǟ?((ėȋĲ-ŵȋö,7,zȋöÓ>ȃė(ŵǹÓ>ȃė, 2 JP(Ăªô-SC û,ƴ':ğȪǶǇąP(9 mm12 mm , 2 J注 1）

本論文の一部は日本建築学会大会学術講演梗概集（2015 年） に発表した。

　　　＊ȒɅǽ,zǺ-ǜȒåư¥ƞ¥Ŋā~üł(2015ǟ)Ƶ 1)+ǧǳ 　ジャパンパイル㈱ 修士（工学）JAPAN PILE Corporation, M. Eng.
　　＊＊　
千葉大学大学院工学研究科
准教授・博士（工学）
Assoc.
Prof.,
Graduate M.
SchoolJAPANPILECorporation,
Eng.of Engineering, Chiba University, Dr. Eng.
Oc[k[Fh§ĲĵľĢ(ø¥)*＊＊＊
　千葉大学大学院工学研究科 大学院生
Grad. Student, Graduate School of Engineering, Chiba University
Assoc.
Prof.,
Graduate
Schoolof Engineering, Chiba University, Dr. Eng.
Ɓȫƞ¥ƞ¥{ø¥çÀŋÇĻǦĢ(ø¥)**＊＊＊＊　千葉大学 名誉教授・工博
Prof. Emeritus, Chiba University, Dr. Eng.
Grad.
Stud.,
Graduate
SchoolofEngineering, Chiba UniversityƁȫƞ¥ƞ¥{ø¥çÀƞ¥{ŷ******* Ɓȫƞ¥ȘȧÇĻøǦProf. Emeritus., Chiba University, Dr. Eng.

─ 823 ─

構造系736 号

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B7ƞ*?(ûǗȚ(ÍƷę©ŘƞǿÙ6'īëCĀSFhQakWŃǂ@?(=ƴ¼9ę,z$(&SčğȪ&īëƘPC ĂȏCÍƷėâC&ĳɀǓǝCĀ,Ƒ+ǤƮƴ¼9ę+<?ȅÅ-ȅÅ*SFhQakWLkHg
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1     Fig.1 +īëƏƮ<0ßƓȬCıJIS A 537310)+Ō&─ 824 ─((+<#&ŷ?C¢Ǟ?

,ȝƠĦƾ@&9ŵūƴ, Py -ſßăǻŇ?ſßăǻŇ-òŚƩ(LkHgW,ſß²ŌÅǇ105 N/mm2LkHg
W,dkIÕů40000 N/mm2Ăª,ſß²ŌÅǇ325 N/mm2
Ăª,dkIÕů205000 N/mm2) CȪŲð+&ėCĀ&¿9

Py 6'-Ň,ï- δy C²Ō(&ǿtŲð+&ėCÓ>ȃėůCǿtƧ'ŵǹ 3 (Ň,¾á*ƺ<0ĳɀȄĭǷǡ+*#?((ȋĲ-ƫǭƴ,û,ɀŢƜ(v*?(!īëƘ S001 ,7-Ǵ@?Ëǿδy -ſßăǻŇĮ,īëƘƴǺ,ƹǿt'

Ā#

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構造系

736 号
īëƘ SL0(ƴ¼9ę*)'-ėǄǗƑ,Ăª+Ì*ƼǊĒÑǧŷȀƑ,ėǄƹ+&Ăª,®Ȑǧŷ(Photo1(a))ĂªCķ>&7?(Ăª,®ȐǧŷŐ+&ûƘLkHgWǥȲLkHgWȀû,

ƴÐǺ+Ȋ@Ȳ"&ǒtƮ+&ŵǹÓ>ȃė,|É(ĥB@?0Ţ,ûƘLkHgW,p¢Ǟ@6ėǄ¬,ŞȚ+ǆ>}Ľȋö+Ë/0¦@¢Ǟ@}ǍÙŢƦȚ,$1@+<?ĳȋö,/0¦@:¢Ǟ@(Photo1(b),(c))
 īëƘ SLS(ƴ¼9ęSFhQakW)'-īëƘ SL0 (Ǯ3&ƞ*ƼǊĒÑǧŷ #"$(#,  #"īëƘ SL0 'ǧŷ<*ėǄƹ',Ăª,®Ȑ-¢Ǟ@*#(Photo1(d))ûƘLkHgW-Ăª,ƼǊĒÑ&p&?(¢īëƘ SL0 (ǒȩ+ûƘLkHgW+-ė

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Photo1 +īëƘ SL0, SLS, SLC ,ėīëŁȺï,ǣŢÈCı6ǫu+¢Ǟ@(Photo1(e))pLkHgWȀCķ>œ

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SFhQakW+ƔŔ*

(C¢Ǟ(Photo1(f))

:,CıīëƘ SLC(ƴ¼9ęLkHgW)'-ėǄǗƑ+&pň?*ƴ¼9ę+<?ȅÅCĀ#&*īëƘ(S001,

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S00, SL0, SL0t, SH0)-«ŢÈ45ǒȩ'#,'īëƘǞ@*#&SLS, SLC (ǒĳɀšä'ƞ?īëƘ SL0 CƝǳ(&ı !

#$

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構造系

736 号

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ăǻ,ǨƻCĀ

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Fig.6(b)<>ŏµĆų+­&-īëƘ SL0t(Ăªô12 mm)

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ęȼŒìƩCȪ

&ŁÊĮ+ĩ?6'ƦȚ,/7ƴȸĳ=,Ãȶ+Ǯɂuar;lN?ƦFig.6(c)<>ËbakW,ēƞƩ+­&-īëƘ S00(ĳ>ýŴȬƉ(ûƘLkHgW, Ăª, ƴ¼9ę),

ɀ0kN)ē:ŕīëƘ SL0(ĳɀ2800kN)(īëƘ SH0(ĳ?ǾȚȄĭ,ƻ+²%ƦȚź12,13)

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1) Ïģ İƴxŵzöxƬ½Ǭşŵ¶Ǿŉ ȕnǺŀƨƞƫũĮ+ƙ?ƚũųǡǴ,Ʃ)-ėȋĲ+<#&v*?zȋöÓ>ȃė'-ŵǹ
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9+-ėȋĲ+ŵǹÓ>ȃėCĕȪ?(Ȏ6ƞ¥Ŋā~üłýƐɎpp.435-4362015.23) ƸɉɆǰțƢ÷ţïrȓ¯´ŸLkHgWû,ËǿÙųǡ+pp.757-7582016.84) ŻƂzŧƃxȭz´ŸLkHgWû,ËǿÙųǡ+­?çÀ
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, 4ǜȒåư¥ƞ¥Ŋā~üłýƐɎpp.763-7542016.87) ƭɇƞȆ3) û,ƴÐǺCƴ¼9ę+<?ȅÅCĀ#&*&óŕHgWû,ǿÙųǡ+­?çÀ , 1 , 2ǜȒåư¥ƞ¥Ŋā~üłýƐɎpp.731-742016.88) ċŵŶİɆǅ śŕɁĉȔñțġɃŞǅȍŴĳɀ(ŭǾɀCīĺ?ąÅǇ PC û,ɀ¥ƿųŢ+­?ĴëąÅǇ PC û,ƚɀ<>SFhQakW+<?ȅÅC

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ĴĘ,û'-ûǏžĈǺ;ƫǭ=Ț'ė@?ɀÙĲ'Ǆ=Ǆ+Î?,+ƙ&īëƘ,û'-ėŢƜ'ė@?ɀÙĲ(*#&?ĴĘ,û(ƣōȽȋĲ+<?Ëīë,īëƘ('-ėǄ,ɀÙĲv*?(=ĴĘ,û'-Ăª,®Ȑ,<,Æ@ŕ(þ=@?6*ÊŐƿ*ǣīëƏƮ,Ųî+<>īë

Ƙ2Ȧ?('?ǿtȿ+îƩ─ 828 ─Ȟ ƊĹöȣĠǅĔ úŰȒÔřƞǘŕǅ×¸´Ÿû(SC ûPRC û),ǿÙųǡ+­?ĴëƿçÀ´ŸLkīëƘ+&ĂªôCô?(-û,ËǿÙųǡ,öŞ+ƙ

ȒçÀ+9,´ŸLkHgWû,ËÅǇ(ǿÙǕųǜȒåư¥¹ŊȉĊł Ɵ 21 ¨ Ɵ 47 ćpp.95-982015.22) ƃxȭzțƢ÷ţ»ƂǖȇSC û,ËDƦīëǜȒåư¥­?çÀ , 1ǜȒåư¥ƞ¥Ŋā~üłýƐɎ2) Ëīë'ǔ=@?īëƩ(ËbakW<0Ëȷ,ēƞĀ#īëƘ'-ēŁ,ǣŢÈ6'¢ǞCĀ&#9ƴ¼9ę+9) ċŵŶİȑxŗǦɆǅ śɁ ŹȤŕɁĉȔǆȂ ôñțġɃŞǅȍŴąÅǇ PC û,ƴÐǺ+ƴ¼9 ó+­?çÀ
ąÅǇ PC û,ƚɀ<0ǿÙųǡöŞ+­?çÀ 2ǜȒåư¥ýƐÜɅǽȉĊłƟ 390 ćpp.134-1411988.810) JIS A 53732016\iGcPW\iPWiPWLkHgWŸǵ11) ǜȒåưýƐ¹ŊĶÄû²ƈ,ƚũſßCþ? pp.39-401997.1112) LkHgW[Fhåſ¹ŊÄ´ŸLkHgWû-²ƈýƐſß_YeEh(åưȁ) 2009.513) ǜ Ȓ å ư ¥  . å ư ƚ ũ ſ ß +   ? Ȅ Ȣ ƚ ɀ ( ǿ Ù ų ǡ (1990) pp.136-1501990.10
jƵ 1) ŕȗŪĤǅƴȠǚɄű zƴx ţ­õ ǁƴxŵzƣōȽȋĲ+<? SC û, M-m ­Õ,Ǵ(, 1) (, 2)ǜȒåư¥ƞ¥Ŋā~üłýƐɎpp.429-4322015.9

構造系736 号

A STUDY ON EFFECTS OF FILL IN HOLLOW PART OF SC PILESA STUDY ON EFFECTS OF FILL IN HOLLOW PART OF SC PILESBASED ON SIMPLE BEAM BENDING TESTBASED ON SIMPLE BEAM BENDING TESTStudy on improvement in deformation capacity of steel & concrete composite pile, Part1

Study on improvement in deformation capacity of steel & concrete composite pile, Part1

Yujiro TANAKA*, Toru SEKIGUCHI**, Shin NAKAI*** and Shoichi NAKAI****
Yujiro TANAKA ＊, Toru SEKIGUCHI ＊＊, Shin NAKAI ＊＊＊＊＊＊＊* JAPANPILE Corporation,Eng.
and Shoichi
NAKAIM.

** Assoc. Prof., Graduate School of Engineering, Chiba University, Dr. Eng.
JAPAN PILE
Corporation,M. Eng.
*** Grad. Stud., Graduate
Schoolof Engineering,Chiba University
Assoc. Prof., Graduate School of Engineering, Chiba University, Dr. Eng.
＊＊＊
Prof. Graduate
Emeritus.,
ChibaofUniversity,Dr.Chiba
Eng. University
Grad.****Student,
SchoolEngineering,＊＊＊＊
Prof. Emeritus, Chiba University, Dr. Eng.
＊＊＊

The objective of this study is to examine the concrete filled effect in the hollow part of SC pile in order to improvethe deformation performance of pile. In the pile foundation structure, the improvement is prompted, assuming
secondary seismic design. But, Study on the deformation capacity of precast concrete pile is not sufficiently advanced.
The bending tests of plie are carried out on a daily basis for performance assessment. The purposes of the test is theconfirmation of the flexural strength. Therefore, the test data accumulation is not enough to discuss the deformation
performance of pile.
This study focuses on the SC pile in precast concrete pile. The SC pile is a cylindrically shaped member
manufactured by centrifugal casting with concrete placed in the hollow section of a steel pipe. The SC pile is acomposite pile that utilizes the merits of concrete with good resistance against compressive forces and steel shell withgood resistance to tensile forces. Concrete prevents local buckling of the steel pipe, while the steel pipe constrains
concrete; therefore, the SC pile has excellent flexural bearing capacity and deformation capacity.
This study examined effects of some parameters for deformation performance of the SC pile by the simple beam
bending test. Four parameters are set for the test. The parameters are 1) Loading method, 2) Steel pipe thickness, 3)
Axial force, 4) Infilled material. We observed the failure conditions, relations between the load and the displacement,and relations between the bending moment and the curvature.
The knowledge obtained from this study are shown below.
1)

Reinforced by infilling the hollow part of the pile with material, the following effects can be expected: preventionof depression of the steel pipe, prevention of flaking or crush of the pile body concrete, and improvement of thebending deformation performance of the pile. It is more effective to use infilled material with high Compressive
strength and high Elastic modulus.

2)

The results of bending tests of piles, maximum flexural strength and maximum curvature, are influenced byloading method. The results obtained by the one-way cyclic loading are greater than those obtained by thepeak-to-peak alternate cyclic loading. Test value obtained by the one-way cyclic loading is on dangerous side as
the evaluation of the deformation performance of the pile. Therefore, it is desirable to adopt the peak-to-peakalternate cyclic loading for appropriate evaluation of the deformation performance of the pile.

3)

It is effective to increase the thickness of the steel pipe for the improvement of the flexural strength of the pile.
But, it is not effective to increase the thickness of the steel pipe for the improvement of the deformation
performance of the pile.

4)

With respect to the maximum value of curvature, the test value of the standard specimens is not more than theanalysis value. The test value of the test specimen that was reinforced with soil cement is about equivalent tothe analysis value. The test value of the test specimen that was reinforced with concrete is greater than or equal
to the analysis value.
（2016 年 11 月 4 日原稿受理，2017 年 2 月 20 日採用決定）

─ 829 ─

構造系736 号