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木材耐震壁設計ソフトウェア
Design segmented wood shear walls to NDS® and SDPWS fast, 正確に, and code compliant with this free version of our wood shear wall design software.
The software allows you to design wood shear walls split into full height panels between openings. The timber shear wall segments share the storey shear based on their stiffness and common wall displacement, and each is then checked against six utility ratios, including wall shear, hold down tension, column tension, column compression, sill crushing, and drift.
A ratio of exactly 0 for column compression or sill crushing means the chord is in net uplift at that load, so the check does not apply. It does not mean the check is comfortably satisfied.
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About the NDS® Wood Shear Wall Design Software
Wood Shear Wall Design Software Hypotheses
- The software only supports the design of timber shear walls using the segmented method; perforated shear walls are not covered.
- Segments are defined in the openings table and are numbered left to right.
- Chords are braced out of plane by the sheathing and the stud wall, so column slenderness uses the full stud depth rather than the built-up post's least dimension.
- The size factor C_F is looked up on a single ply, not on the full built-up chord.
- Nails are considered as common nails, at the lengths SDPWS Table A1 tabulates.
- The shear-distribution provisions of SDPWS 4.3.5.5 are limited to a line whose walls share the same sheathing materials. This calculator does not use that exception: it solves 4.3.5.5.1 自体, giving every segment the same calculated deflection, which is a rational analysis that holds whether or not the assemblies match.
- The full tributary width of the wall resists uplift in the tension post, but only half the stud spacing amplifies compression in the compression post.
Wood Shear Wall Calculator Limitations
- Unblocked walls are limited to 16ft in length.
- Simultaneous uplift and shear is currently not validated.
- When a wall has double sheathing on both sides, the software considers that both are identical (same grade, 厚さ, and nailing).
- Anchoring of the sill plate is not included. Uplift and linear shear forces are not transferred to the substrate. Please see the output for the governing magnitude for each segment.
- Sill crushing is unbounded above F_cp. Nothing caps the bearing overstress ratio, so a badly overloaded post produces a very large deflection.
- Framing width is not modelled. Every stud is a single 2x, and only the chords stack plies, so where SDPWS 4.3.7.1(5) calls for 3 in nominal framing and staggered nailing at adjoining panel edges, the software will raise a warning.
- Header and trimmer/king stud design is excluded. Only the wall panels between openings are designed here; the lintel spanning an opening and the studs framing it are not sized.
- Column compression is checked for the lateral load combination only.
Wood Shear Wall Software Design Checks
The wood shear wall software completes the following design checks, where each check is demand divided by capacity, evaluated per segment in every direction solved.
- 小切手 1: Wall Shear. Determined against the SDPWS Table 4.3A nominal capacity for that segment's own sheathing assembly, modified by the following parameters:
- Ω_D (2.0 風, 2.8 地震)
- φ_aspect, the aspect ratio factor for slim shear walls (1.25 - 0.125 h/b above 2:1).
- φ_framing, the specific gravity adjustment 1 - (0.5 - G) for framing lighter than Douglas-Fir-Larch or Southern Pine.
- φ_pos, a 0.92 reduction when the hold-down carrying tension is on the inside face of the end post (注意 10). The note grants this to assemblies with 10d common nails only.
- C_ub for unblocked shear walls.
- 小切手 2: Hold-down Tension. Determined against the selected model's rated capacity, rescaled from the specific gravity the catalogue tabulates it at (0.43 SPF/HF, 0.50 DF/SP) to the framing species chosen.
- 小切手 3: Column Tension. In the tension chord, against F_t'.
- 小切手 4: Column Compression. In the compression chord, against F_c'.
- 小切手 5: Sill Crushing. The compression chord bearing across the grain into the sill plate, against F_cp' with the bearing area factor C_b. This is also the term driving the nonlinear part of the deflection, so failing it and a large drift tend to arrive together.
- 小切手 6: ドリフト. The service displacement of the wall line against the selected allowable storey drift. It is a property of the line rather than of any one panel, so the same value repeats across every segment of a direction.
As stated earlier, a ratio of exactly 0 on column compression or sill crushing means the chord is in net uplift at that load, so the check does not apply. It does not mean the check is comfortably satisfied.
Selecting the Wood Shear Wall Drift Limit
- 風: H/400 (デフォルト), H/500, H/600.
- 地震: H/40, H/50 (デフォルト), H/66.7, H/100, H/150.
Wood Shear Wall Software References
- 木造建築に関する国家設計仕様書 2018
- NDS® Supplement: Design Values for Wood Construction 2018
- Special Design Provisions for Wind and Seismic 2021
- ASCE 7: 最小設計荷重
- ASTM D143: Standard Test Methods for Small Clear Specimens of Timber
SkyCiv 設計ソフトウェア
SkyCiv は、幅広いクラウド構造解析およびエンジニアリング設計ソフトウェアを提供します, 含む:
- SkyCiv クイックデザイン
- 鋼製 I ビーム耐荷重計算機
- AS / NZS 1664 アルミデザイン
- AS / NZS 4600 母屋のデザイン
- なので 3600 コンクリートせん断壁の設計
- なので 2870 勾配設計上の住宅スラブ
- AS / NZS 1576 足場の設計
- なので 4055 風荷重計算機
- なので 4100 ボルトグループ計算機
- なので 4600 冷間成形鋼設計カリキュレータ
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SkyCiv は、シームレスな統合を特徴とするカスタマイズされたソリューションです, 簡単な実装, 自動レポートとスケーラブルな設計とアーキテクチャ.
