结构通用说明

General Notes on Structural Design & Construction 1. General 1.1 Indoor structural floor level 0.000 of this project equals to Yellow Sea elevation 3.700m. Level difference between indoor floor and outdoor ground is 300mm. 1.2 Structural type: framed structure. 1.3 Unless otherwise indicated, all dimensions are in millimeter (mm) and levels in meter (m). 1.4 Natural conditions: 1.4.1 Basic wind load: 0.45KN/m2     Basic snow load: 0.40KN/m2 1.4.2 Underground water has no corrosion to concrete. Liquefied soil do not exist in foundation bed. Ground roughness is of Category B. 1.4.3 Basic earthquake intensity: Grade 6. Building anti-seismic design: based on Category C, Grade 6. Basis acceleration: 0.05g Anti-seismic design: based on 1st group Site category: Category III. Design characteristic interval: 0.45 sec. 1.5 The structural design is based on service life of 50 year, structural safety grade 3, structure importance factor 0= 1.0 and foundation design Grade C. 1.6 Masonry construction quality control grade is Grade B. 1.7 Fire resistance rating of the building is Grade 2. 1.8 Frozen soil depth: not considered. 2. Design Basis 2.1 Environment category: Category I, II(a) and II (b). 2.2 Codes, regulations and standards - “Building Structure Loading Codes” GB50009-2001 - “Concrete Structure Design Codes” GB50010-2002 - “Building Anti-seismic Design Codes” GB50011-2001 - “Building Foundation Design Codes” GB50007-2002 - “Masonry Structure Design Codes” GB50003-2001 - “Technical Regulation for Pile Foundation” JGJ94-94 - “Construction Structure Construction Quality Acceptance Codes” GB50204-2002 - “Foundation Construction Quality Acceptance Codes” GB50202-2002 - “Building Structure Reliability Design Standards” GB50068-2001 - “Technical Regulation for Rebar Mesh Concrete” JGJ/T114-97 - “Integral Plane Drafting Rules and Details for Structure Construction Drawings”     03G101-1 - “Anti-seismic Construction Detail”03G329-1 2.3 “Soil Survey Report”A-2004-014 dated Feb., 2004 prepared by South-west Survey Design institute. 2.4 Input and requirement from other disciplines and minutes of design liaison meetings and communications with the Client. 2.5 Software: PKPM new codes version. EDRI’ user codes is S621. 3. Design Loads 3.1 Live load 1st floor architectural floor,    : 10.0KN/m2 3.2 Live load 2nd floor    : 2.0 KN/m2 (Office area)     Roof    : 0.5 KN/m2; 2.0 KN/m2    3.3 Live load staircase    : 3.5KN/m2     Toilet    : 8.0KN/m2 4. Materials 4.1 Steel 4.1.1 Strength design value of grade HPB235 Bar (indicated as ): fy = fy = 210N/mm2 4.1.2 Strength design value of grade HRB335 Bar (indicated as ): fy = fy = 300N/mm2 4.1.3 Strength design value of grade HRB400 Bar (indicated as ): fy = fy = 360N/mm2 4.1.4 Welded mesh: GradeLL550 cold rolled ribbed bar (indicated as R), to be fabricated according to “Technical Regulations for Welded Bar Mesh Concrete”. 4.1.5 Welding rod: E43xx type welding rod will be used for welding between no. Q235 bard and between HPB235 bars, and between HPB235 bar and HRB335 bar and HRB400 bar; E50xx type welding rod will be used for lap electric arc welding between HRB335 bars. 4.1.6 Hooks for each pre-fabricated members and hanging hooks shall be fabricated with HPB235 bar without cold-treatment. 4.1.7 Physical features and chemical composition of steel bars, steel plates, shaped steel and welding rod must meet national standards. 4.2 Concrete (unless otherwise indicated) 4.2.1 Concrete C10: for bedding course 4.2.2 Concrete C35: for tie-column, lintel, coping beam. 4.2.3 Concrete C25: for isolated foundation; Concrete C30: for strip foundation 4.2.4 Concrete C30: for column, beam, slab. 4.3 Masonry (unless otherwise indicated) 4.3.1 Unless otherwise indicated on drawing, sintered solid brick will be used below 0.000 and sintered porous brick used above 0.000. Strength grade MU10. 4.3.2 Mortar for wall masonry (unless otherwise indicated): Cement mortar with strength of M7.5 will be used below damp proof course of foundation. Mixed mortar with strength of M5 will be used above damp proof course of foundation. 4.3.3 Damp proof course for wall: use 20mm thick 1:2 cement mortar (mixed with inorganic aluminum salt waterproof agent weighing 3% of the cement) at level of –0.060m. When the top level of RC foundation beam or ring beam is above –0.100m, the damp proof course could be cancelled. When it is below –0.100m, the damp proof course is required. 4.3.4 Refer to relevant drawings for specification of anti-corrosion materials. 5. Foundation 5.1 Foundation type adopted in this project: 独立基础：    Isolated foundation 桩承台：    Pile cap 桩筏：    Pile raft 筏基：    Raft foundation 砼条基：    Strip foundation 5.2 Isolated foundation: support stratum for the foundation is stratum 2 clay soil, which have a bearing capacity of 200Kpa. The foundation bottom shall be extended to support stratum by no less than 200mm. If the support stratum is not found at designed excavation level, the excavation shall be continued at 1:2 slope till 200mm below support stratum and foundation shall be deepened accordingly. If the pit for isolated foundation is deepened by 500mm, backfill the pit with C15 rubble concrete to designed level. If it is deepened by >500mm, the designer shall be consulted for appropriate solution. 6.3 During foundation construction measures shall be taken to drain pit water and lower underground water level and prevent rainwater or ground water from entering the pit. Unless otherwise indicated, upon foundation completion, soil shall be back filled and rammed layer by layer. 6.4 For cast-in-situ foundation without side forms, effective measures shall be taken to avoid concrete running-away. 6.5 Slag course with width of 100~150mm and width of 1.5 times beam width shall be filled at bottom of foundation beam. 6.6 Footing for non-bearing brick wall not indicated on structural plan shall be in accordance with architectural drawings and as the following details show. When the footing bottom level is at the backfilling layer, the pit backfilling shall be rammed carefully with compaction factor of no less than 0.94. 防潮层     Damp proof course 混凝土     Concrete 120非承重墙基础    120 non-bearing wall footing0 7. Wall 7.1 Wall masonry shall follow “Building Anti-seismic Details” 03G329. 7.2 Opening on wall (including brick footing): RC lintel to be provided on opening top when opening width is 600mm. And Flat course brick lintel as indicated to be provided on opening top when opening width is <600mm and no concentrated load present on top. 墙体 Wall 水泥砂浆 Cement mortar 8. Reinforced Concrete Member 8.1 Thickness of concrete covering for stressed rebar (unless otherwise indicated): 8.1.1 Normal indoor environment: Slab, wall    : 15mm Beam    : 25mm Column    : 30mm. 8.1.2 Foundation (including equipment pad): 40mm (with bedding), or 70mm (without bedding). 8.1.3 In conformity with the minimum thickness as specified in page 33, 03G101-1 unless otherwise indicated. 8.2 Size of hoop bar and S-shaped bar is based on inner diameter and that of bent bar based on outer diameter. 8.3 135 hook shall be provided for the hoop bars of frame column and beam for anti-seismic purpose. Straight section of the hook end shall have a length of 10d (d is hoop bar diameter) or 75mm, whichever is the bigger, as indicated below: 梁、柱封闭箍筋     Closed hoop bar of beam/column 较大值    Bigger value 拉筋    Tie bar 拉筋紧靠纵向钢筋并钩住箍筋    Tie bar abutting upon vertical bar and hooking hoop bar 8.4 Unless otherwise indicated, first hoop bar in beam shall be located 50mm away from the bearer edge and bending end point of bent bar shall be 50mm from the bearer edge as indicated: 弯起终点    Bending end point 支座    Bearer 第一箍筋    First hoop bar 图中角度当梁高300~800mmo 45, 当梁高>800mm 为60 = 45 when beam height is 300~800mm and = 60 when beam height is > 800mm 9. Miscellaneous 9.1 Unless otherwise indicated on drawing, all exposed iron members shall be applied with red lead primer and two coats of gray mixed paint. Non-exposed parts (except that buried in concrete) shall be applied with two coats of red lead paint. 9.2 Unless otherwise indicated on drawing, all wooden members which contact with brick wall or concrete shall be coated with asphalt for anti-corrosion purpose. 9.3 Practical anti-tip measures shall be taken during construction for relevant members such as canopy, cantilever beam, cantilever eaves, etc.. Bottom of cantilever members can not be removed until concrete strength of hanging members reaches 80%. All bottom forms can not be removed if above members such as canopy, cantilever beam, etc. are used as supporting of upper forms. And efficient measures shall be taken for foundation of support form of ground floor in order to prevent against foundation sinking. 9.4 Construction during winter or special climate or other conditions shall be executed according to relevant standards, regulations and codes. 9.5 Penetration in the floor slab shall be made in accurate position and without cutting rebar of the slab rib. 9.6 The current national construction and acceptance codes as listed below shall be strictly followed. Acceptance and quality appraisal standards shall be also be strictly followed and examination and acceptance recodes of hidden works shall be well kept. - “Building Construction Quality Acceptance Standards”GB500300-2001 - “Construction and Acceptance Codes for Ground Base and Foundation”     GB50202-2002 - “Construction Quality Acceptance Codes for Brickwork “GB50203-2002 - “Construction Quality Acceptance Codes for Concrete Structure” GB50204-2002 - “Construction Quality Acceptance Codes for Steel Structure” GB50205-2002 - “Construction Quality Acceptance Codes for Wooden Structure” GB50206-2002 - “Construction Quality Acceptance Codes for Roof Works” GB50207-2002 - “Construction Quality Acceptance Codes for Underground Waterproof Works”     GB50208-2002 9.7 Structure construction shall be in close coordination with architectural (A), HVAC (H), water supply & drainage (W), gas utility (G), electrical (E) drawings for penetrations in floor slab or shear walls and special attention shall be paid to accurate position of embedded parts in members and preformed penetrations. Avoid to make penetration in beam or column., 9.8 Lightning Protection (see electrical drawings for details) 9.8.1 Two whole length bars in diagonal in every column will be used as electrical bars, which will be welded to reinforcement in foundation slab with 100mm long welding seam. For floor equipotential connection, steel plate embedded in the column (see electrical drawings for location) shall be welded to the electrical bars in the column. Embedded bolts in steel column, steel roof beam shall be welded to the bars in column or beam. 9.8.2 All foundation beams and upper frame beams shall have two upper corner bars as electrical bars and welded to electrical bars in column with 100mm long welding seam. Mesh reinforcement in cast-in-situ roof slab shall be welded to electrical bars in peripheral columns. Refer to electrical drawings for welding details. 9.8.3 Each pile shall have two bars as electrical bars welded to mesh reinforcement in foundation slab with 00mm long welding seam. 9.8.4 See architectural and electrical drawings for lightning protection details of roof parapet. 9.9 If any conflicts between this General Notes and Notes on individual drawings, the notes on the drawings shall prevail. 10. Anti-seismic Details and Construction Requirement 10.1 Vertical bars of in the top of side frame column and corner column shall be in accordance with details (anti-seismic)on page 37 and details (non-anti-seismic) on page 43, 03G101-1 10.2 See following details for vertical construct bar and tie bar in beam side: 注：Notes: 1. Provide vertical construct bar along the length at both sides of beam (a 200) when     hw450. 2. When hw450, vertical construct bar is 14mm in diameter, with same strength grade as     main bar in the beam, unless otherwise indicated on drawings. 3. Spacing of tie bars is two time of spacing of hoop bars in non-densified area. In case of     more than one rows of tie bars, the upper row and lower row shall be staggered. 4. Construct bar is 16mm in diameter when beam width is 550b750. 5. Notes on individual drawings shall prevail. 构造配筋    Construct bar 10.3 梁附加吊(箍)筋构造    Additional hanger bar (hoop bar) of beam 注Notes: 1.    Within “S” scope imposed by concentrated load, regular hoop bars or hoop bars for     densified area shall be provided as normal. 2. Refer to detail (1) when” is indicated and refer to detail (2) when “ ” is     indicated. 3. Notes on individual drawings shall prevail. 主梁     Main beam 次梁     Sub beam 边支座    Side bearer 中间支座    Middle bearer 直径同主梁箍筋    Diameter same as hoop bar of main beam 附加箍筋构造(一)     Additional Hoop Bar Detail (I) 一级次梁    Grade 1 sub beam 二级次梁    Grade 2 sub beam 直径同主梁箍筋    Diameter same as hoop bar of main beam 附加箍筋构造(二)     Additional Hoop Bar Detail (II) 附加吊筋    Additional hanging bar 附加箍筋每侧4组    Additional hoop bars 4 pairs each side 直径同主梁箍筋    Diameter same as hoop bar of main beam 主梁     Main beam 梁上柱下梁加筋节点大样    Detail of Additional Bars in Beam at connection with Column 10.4 Detail drawings of beam/column reinforcement for this project are based on national standards 03G101-1 “Integral Plane Drafting Rules and Details for Structure Construction Drawings”.  Unless otherwise indicated in General Notes or notes on individual drawings, reinforcement details for beam, column, etc.. shall follow 03G101-1 according to anti-seismic intensity and grade of this project. 10.5 Strengthen belt: Use JM-III modified cement to substitute 12% normal cement by weight in the concrete. Construction and curing of the strength belt must be in strict accordance with JM-III modified cement manufacturer’s instruction. 11. Wall Details 11.1 墙与钢筋混凝土柱连接    Connection between Wall and RC Column 砖块高    Brick height 框架柱    Frame column 且不小于墙长的1/5    And no less than 1/5 of wall length 混凝土墙    Concrete wall 11.2 框架填充墙当墙长>4m时，须在墙中间增设构造柱，如下图： When frame filler wall is longer than 4m, tie column shall be provided in the middle of the wall as the following details indicates: 梁中预留钢筋或埋钢板    Embedded rebar or steel plate in beam 搭接或与钢板焊接    Lapped or welded to steel plate 梁中预留    Embedded in beam 构造柱示意图    Tie column sketch 当构造柱为角柱    In case of corner column 上、下部伸入梁、板内各30d    Top and bottom extended into beam, slab by 30d    respectively 墙厚    Wall thickness 且不小于墙长的1/5    And no less than 1/5 of wall length 砖块高    Brick height 隔墙和构造柱做法    Connection between partition wall and tie column 11.3 Tie column as above indicated shall be provided for roof parapet, both sides of door & window with width 3000mm, wall under continuous window or wall under metal stud wall. Spacing of the tie columns shall be 3000mm. 11.4 框架填充墙墙顶与框架梁(或板)连接如下图： Connection between frame filler wall top and frame beam (or slab) is as follows: 墙长度>5米     Wall Width >5m 墙长度5米     Wall Width 5m 砖墙顶部与梁连接做法(一)    Connection Detail between Brick Wall Top and Beam(1) 梁或板    Beam or slab 待下部平砌砖墙沉实(至少7天)后再75%斜砌墙，砌筑时应砂浆饱满逐块顶 75% sloped brickwork with full mortar, to be masoned upon settlement (for at least 7 days) of flat brickwork. 11.5 For framed filler wall with length between 5m and 7m or no less than 4m, horizontal wall beam with whole length rebar connected to column shall be provided at door lintel. The wall beam shall be constructed with C20 concrete and with following section sizes and reinforcement: 用于拐角首跨    For first span at turning 通长    Whole length 过梁加筋当门窗洞口宽度1800时为     214 additional rebar for lintel when opening width 1800 过梁加筋当门窗洞口宽度>1800时为220     220 additional rebar for lintel when opening width >1800 墙厚    Wall thickness 水平墙梁     Horizontal wall beam 12. 其他构造    Other Details 主梁    Main beam 一级次梁    Primary sub-beam 锚固长度    Anchorage length 二级次梁    Secondary sub-beam 梁相同高度时构造大样    Detail of Beams with Same Height 楼板    Floor slab 砼梁    Concrete beam 板面高低差处板面钢筋锚固    Slab Rebar Anchorage at Level Deviation Location 附加钢筋每侧214(216)    Additional rebar 214(216) each side 位于下部    At bottom 板洞口加筋大样(洞口靠梁一侧不加筋)    Additional Rebar at Slab Opening (without     additional rebar at the side adjacent to beam) 墙    Wall 金属止水带    Metal water stop 钢板厚    Steel plate thickness 砼底板    Concrete bottom slab 砼墙与底板止水带做法    Water Stop Belt for Concrete Wall and Bottom Slab 砼垫层    Concrete bedding 防潮层    Vapor barrier 板    Slab 梁    Beam 120厚砖    120 brick 夯实土层    Rammed soil 地面梁板模板大样图    Grade Beam/slab Formwork Detail 注：防潮层见建筑做法    See architectural drawings for vapor barrier details 钢筋    Rebar 框架梁或次梁主筋    Frame beam or main rebar of sub-beam 箍筋    Hoop bar 附加钢筋    Additional rebar 后浇施工带    Post-cast belt 注Notes： Post-cast belt shall be poured with concrete two grades higher in strength than concrete used for superstructure and micro-expansion cement shall be used. The belt shall be poured 40 days after superstructure completion and under temperature similar to superstructure construction. 13. Steel Rebar Anchorage Length Schedule 钢筋直径    Rebar diameter 砼标号    Concrete grade HPB 235级钢筋     HPB 235 rebar