{'fraction_non_alphanumeric': 0.019438444924406047, 'fraction_numerical': 0.0021598272138228943, 'mean_word_length': 4.75776397515528, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Study on Anchorage Properties of Bundled Bars in Reinforced Concrete Beams

The first part of this paper describes the results of pull-out tests on 31 pieces of concrete specimens with bundled steel bars embedded. Based on the initial pull-out test results, a series of R.C. beam specimens that had been reinforced with bundled longitudinal steel bars were prepared and tested. The bond-anchorage characteristics and the major factors affecting the bond-anchorage properties of bundled steel bars in a R.C. beam, with comparisons to beams reinforced in the regular way, are discussed in detail. Formulas for calculating the required anchorage length of bundled steel bars are proposed. Calculated results from the proposed formulas agree well with the test results, and the design method of using bundled steel bars in beams is proposed. This proposal can be used as a reference for future revision of the Chinese Design Code.