工程建设标准强制性条文cpecs-b-7房屋建筑部分英文版

工程建设标准强制性条文cpecs-b-7房屋建筑部分英文版内容摘要：

ken to protect the supportingprotecting framework and existing buildings. 1) The maximum horizontal bitshift of supportingprotecting framework of the foundation pit is already larger than 1/200 (1/300) of dug depth of the pit, or more than 3mm/day (2 mm) for three continuous days. 2) Individual element of the supporting rod ( or anchoring rod) system of the supporting protecting framework of the foundation pit is bearing a stress that is increasing suddenly, or there is sign showing that the element is yielded, cracked, loosen or drawn off. 3) Uneven sink of the construction (differential sink) is already more than the permitted sink difference that is specified in the existing specification for earth foundation designing。 or inclination has been more than H/d for three continuous days(H = height of the construction. 4) A crack seam with width of 3mm() appears in the building block of existing construction, or crack seam with width more than 15mm (10mm) appears in adjacent earth surface. — 6 — 5) Sign that may lead to a shearing damage appears at the bottom of the foundation pit, or other sign that may affect security appears. 6) circumstance that, according to the local experience, must be monitored extensively appears. Note：② If the adjacent constructions where people are always gathering, or are cultural relics, historical memorial construction, or locate at key munication ways, or there are critical pipe work or underground facilities to be protected, the data in the brackets shall be used as limit.) 2. Appraisal for earthquakeresistance of house Basis of appraisal of defense against earthquake Standard for appraisal for construction GB 5002395 The existing constructions shall be divided into 4 categories, for which the checking putation and appraisal for structure shall meet the following requirements: Category A: checking putation for earthquake resistance and structure shall be practiced in accordance with rules specially decided. Category B: checking putation for earthquake resistance may be practiced in accordance with defensive intensity。 for earthquakeproof structure, it may be one degree higher than normal, excluding that is 9 degree. Category C: Both checking putation for earthquake resistance and structure shall be in accordance with the requirement of earthquake resistance defensive intensity. Category D: At 7~9 degree, requirement of checking putation may be lower and earthquakeproof structure may be lowered by one degree. It is not necessary to do appraisal for those lower than 6 degree. General rules Standard for appraisal for construction GB 5002395 Appraisal for earthquake resistance of the existing construction shall include the following content and requirement: The initial information such as survey report, construction drawings, finishing drawings, and documents for acceptance of the project shall be collected。 remedy shall be done in case information is not sufficient. Survey how the existing circumstance of the construction meets the initial information and the situation of construction property and maintenance, to reveal concerned defects on nonresistance of earthquake. According to factors such as specialty, structure arrangement, framework and earthquakeresistance load bearing capability of various constructions structures, corresponding — 7 — appraisal method shall be adopted to make analysis of prehensive earthquake resistance capability. Evaluation of entire capability of earthquake resistance of existing construction shall be made. To those that do not meet requirement in appraisal, a treatment plan on earthquake resistance and hazardreducing shall be provided. The basic content and requirement for macrocontrol and structure appraisal for existing construction shall meet the following rules: When the horizontal and vertical surface, quality, rigidity distribution and sideload bearing elements such element brick wall of the construction are significantly not symmetric in the arranged plane, an analysis of hazard factor of earthquake torque effect shall be carried out. When there is discontinuity between upper and lower parts of the element or a mutation of rigidity distribution along the height exist, it is necessary to find out the weak location, which is then to be appraised in accordance with corresponding requirement. When the structure system is being inspected, it is necessary to find out the ponent or element, whose failure may lead to the whole system lost earthquake resistance capability or lost load bearing capability. When there is a house whose floor planes of the same story are at different elevations, or different types of structure systems are to be connected, requirement for earthquake resistance capability of the corresponding location shall be higher. For those elements of degree 6, checking putation for earthquake resistance is not necessary. For those of 8 to 9 degree, if the site of construction is located at a poor location such as an extruding hill mouth, high and isolated hill, nonrocky steep slope, river bank or edge of a side slope, evaluation shall be performed on the stability in earthquake, earth foundation slipping tendency, and possible danger of the construction. For category B constructions located at river bank or sea shore, when liquefied layer inclines towards river center or sea shore, an identifying judgement for danger of soil slipping or cracking after liquidation. When checking putation for load bearing capability of existing natural earth foundation is performed, a designing value of static load bearing capability of a long period pressedtodense base earth shall be used instead of design value of static earth load bearing capability. The former is resulted from the latter m。