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なので 1720 メンバーデザイン

Member Design for Timber Structures according to AS 1720 – 2010


Before you begin

Before you begin the design module, you will need to perform the following extra steps.

  1. 設計コードの荷重組み合わせをインポート.
  2. Assign design code load cases to the load groups in your model.

Design Specific Information



  • 長方形
  • 円形

Integrated section database of common sections for sawn timber, GluLam と LVL.


  • Sawn timber, 味付けと無味付け
  • GluLam
  • Pole timber
  • LVL (coming)

Integrated material database of sawn timber, GluLam and pole timber.



詳細 tab you can enter your project details so that they are displayed on your report, however they are not required.



DEFINITION: Design Member: メンバー, or group of connected members with the same section and material.

会員 tab contains several tables:

  1. デザインメンバー テーブル: 下記参照.
  2. 材料 テーブル: for your reference to review the materials used in your design.
  3. セクション テーブル: also for reference.

デザインメンバー table allows you to add, remove and edit the design members deflection limit and parameters. If you are using the S3D integration version this information will be automatically filled with default values.

会員 編集できるタブ:

  1. メンバーID(s) 分野: you can add multiple members to a single design member to simplify your design. Enter the member ids separated by commas.
  2. DefL 分野: choose an appropriate deflection limit, これは、たわみ利用率の計算に必要です。.
  3. パラメータID 分野: the ID that links your design member to the パラメータ table in the パラメーター タブ, パラメータ設定の詳細については、以下をお読みください.

注意: Entering items like members or nodes as a comma separated list is a useful feature used widely in SkyCiv. 例えば: when modelling you can apply the same loads to multiple members by entering a comma separated list of the member ids in the メンバーID 分野.



Due to the number of parameters required for calculations in AS 1720, we’ve made it easier for you to enter them by creating a parameter table that links to the デザインメンバー テーブル. If you have design members which are similar you don’t need to re-enter the same parameters for each one, just assign them the same Parameter ID.

パラメータID is entered in the デザインメンバー table under the 会員 タブ, 上記を参照.

注意: The bulk of parameters have been hiddento access them, クリック 編集 icon under More Parameters 見出し.

パラメーター 編集できるタブ:

  1. k4 分野: 部分調味料.
  2. k6 落ちる: 温度係数.
  3. ファイ 落ちる: 容量係数.
  4. g13 落ちる: 有効長さ係数.
  5. Description 分野: for your reference, does not appear in report.


When the edit icon is clicked is opened, you will see parameters are grouped:

  1. Intermediate Restraints タブ: for bending and compression buckling.
  2. ポール タブ: 円形セクションの場合.
  3. Strength Sharing タブ: for bending checks on rectangular sections.
  4. テンション タブ: for bolted members.

Intermediate Restraints Parameters

If you would like to apply these parameters, please set the 適用する toggle to on.

Intermediate Restraints 編集できるタブ:

  1. 長軸 落ちる: type of restraint against major axis buckling.
  2. L 分野: distance between discrete restraints.
  3. Minor Axis 落ちる: type of restraint against minor axis buckling and lateral-torsional buckling.
  4. Minor Axis Position drop-down position of the restraint on the section, positive if the restraint is on the top edge of a normally orientated beam.
  5. Lay 分野: the distance between discrete restraints, if the Minor Axis field is set to Discrete this is required.
  6. Fly Braces 落ちる: partial restraint against lateral-torsional buckling.
  7. La-φ 分野: The distance between fly braces.


Pole Parameters

If you would like to apply these parameters, please set the 適用する toggle to on.

On this tab you can edit:

  1. Species Class 分野: for k20 and k21, the standard provides a method for calculating the values for Eucalypts and Corymbias, と針葉樹. Other hardwoods must be estimated.
  2. j9 分野: immaturity rigidity factor.
  3. k20 分野: immaturity strength factor.
  4. k21 落ちる: shaving factor.
  5. k21b, k21cl, k21cp,v, そして k21t fields: shaving factors for various strength properties.
  6. k22 落ちる: processing type.

Strength Sharing Parameters

If you would like to apply these parameters, please set the 適用する toggle to on.

Strength Sharing 編集できるタブ:

  1. Parallel System 分野: choose a combination of discrete and combined.
  2. Ncom 落ちる: number of elements combined into a discrete unit.
  3. Nmem 落ちる: number of discrete units the the system.
  4. 間隔 分野: centre-to-centre spacing of discrete units.
  5. スパン長 分野: effective span of the parallel members.


Tension Parameters

If you would like to apply these parameters, please set the 適用する toggle to on.

テンション 編集できるタブ:

  1. Number of bolts 分野: number of bolts at the critical cross-section.
  2. Bolt diameter 分野: ボルトの直径.
  3. Bolt hole 公差フィールド: 許容範囲.

注意: The calculation of A assumes that the bolts are through the smallest cross-section and are evenly spaced. 最小間隔またはエッジ距離は考慮されていません.



All materials are affected by creep (連続荷重下での要素の変形の、時間の経過に伴うゆっくりとした微細な増加). Timber has a significant creep effect unlike other common construction materials like concrete and steel, timber creep is orders of magnitude more. これにより、木造構造物への荷重の設計がやや複雑になります。, the duration of load needs to be considered for every load combination.

To account for this effect AS 1720 provides a factor for duration of load for strength (k1) and guidance on the appropriate factors to use for load combinations from AS 1170. These are automatically filled into the load combinations parameters based on the load duration units select.

負荷 tab contains:

  1. タブ: for strength load combinations.
  2. 保守性 タブ: 保守負荷の組み合わせ用.
  3. Unallocated タブ: ユーザー定義の荷重の組み合わせは、いずれかに移動できます または 保守性 タブ.


注意: カスタム荷重の組み合わせを割り当てるには, 移動先の荷重組み合わせタイプのボタンをクリックするだけです. その後, 適切なタブで負荷の組み合わせ要因を確認します.


  1. 名前 落ちる: select the name of the load combination to be displayed.
  2. Description 分野: for reference, does not appear in report.
  3. Duration Units 落ちる: 秒, 分, 時間, 日々, months or decades, these correspond with the k1 factor table.
  4. Nominal Load Modification Factor 落ちる: なし, short-term, 長期, 地震, combination or custom.
  5. Nominal Load Modification Factors fields for each load group: to edit select the ‘custom’ から Nominal Load Modification Factor drop-down custom type, otherwise these will be automatically filled with AS 1170 値.



保守性 編集できるタブ:

  1. 名前 落ちる: select the name of the load combination to be displayed.
  2. Description: not required, does not appear in report.
  3. Nominal Load Modification Factor drop down: なし, short-term, 長期, 地震, combination or custom.
  4. The fields in the Greater than 1 Year, 5 月, 5 Days and Less then 1 日 コラム: these factors are proportions of the load case that is equal to the each respective load duration.

注意: Each factor load duration proportion must be ≤ 1 and the sum of all load duration proportions on each row must be ≤ 1.



Once you have completed all of the above steps you can now check your design by clicking the デザインを確認する ボタン. The software will alert you if you have missed any required fields, otherwise you will be taken to the Results tab.

構造が非線形の振る舞いを示す場合、非線形または2次の静的解析が適しています 結果 tab you have an overview of the utility ratios of the important checks in the design code in the Member Design Ratios テーブル, if you’d like more detail you can click on the 設計の概要 button for a summary report.

In this member design module, individual reports are also available by clicking on the report icon in the 報告する column of the Member Design Ratios テーブル.


最後に, you can see the overall governing results for each member by checking results displayed on the Wire-frame Model on the left.


はい 番号