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Deformation-decoupled connections between a pultruded GFRP frame and three-layer 3D-printed walls

Field of Science:MultidisciplinaryMultidisciplinary
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International Scientific Journal Science and Innovation

International Scientific Journal Science and Innovation

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Pultruded glass-fiber-reinforced polymer (GFRP) frames and additively manufactured wall panels respond differently to temperature, shrinkage, and interstory drift. A rigid link between them can make a nominally non-load-bearing wall participate in the lateral system and can initiate brittle damage around fasteners or printed interlayers. This paper develops an analytical design procedure for a deformation-decoupled interface in which wall weight, out-of-plane restraint, and in-plane movement are assigned to separate components. The study is deliberately numerical; no laboratory results are reported. A reproducible two-story benchmark building in Tashkent is used to demonstrate the procedure. Loads are derived from stated geometry, densities, and design combinations rather than introduced as free numerical inputs. The original four-bolt U1 detail is reassessed against bearing, net-section tension, shear-out, cleavage, block-shear, bolt-shear, and local interlaminar-screening limit states. With EN 13706 E23 minimum properties and ASCE/SEI 74-23 resistance factors, a conventional hollow-wall through-bolt arrangement is inadequate because the tube-wall bearing reduction governs. A revised seated cleat with internal backing plates, spacer sleeves, and two M16 bolts on each of two symmetric side plates satisfies the short-duration 35.0 kN reaction and the sustained-load check; the highest sustained-load utilization is 0.94. For a 3.6 × 3.0 m wall module, the factored weight is 22.95 kN and the reaction at each of four lower supports is 7.46 kN. A stated wind-load envelope gives 1.20 kPa and 3.24 kN per side anchor. The required one-sided travel is 37.52 mm when no unverified elastic allowance is deducted, leading to a 95 mm slot. A 10% wall-participation limit is derived from a 5% cap on period reduction rather than adopted as an unexplained constant. The paper separates analytical conclusions from the tests still required before construction use.

AUTHORS

D.Akbarov

Mustaqil tadqiqotchi

K.Akramov

"TOSHKENT ARXITEKTURA-QURILISH UNIVERSITETI" DAVLAT MUASSASASI

Tags

# pultruded GFRP# concrete 3D printing# bolted connection# sliding anchor# interstory drift# deformation compatibility# non-load-bearing wall# limit-state design

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